{"id":27782,"date":"2024-01-03T21:53:19","date_gmt":"2024-01-03T19:53:19","guid":{"rendered":"https:\/\/hho-bulgaria.com\/hydrogen-water-vs-milk-breath-hydrogen-levels\/"},"modified":"2024-01-29T21:20:19","modified_gmt":"2024-01-29T19:20:19","slug":"hydrogen-water-vs-milk-breath-hydrogen-levels","status":"publish","type":"post","link":"https:\/\/hho-bulgaria.com\/en\/hydrogen-water-vs-milk-breath-hydrogen-levels\/","title":{"rendered":"Hydrogen Water vs. Milk: Breath Hydrogen Levels"},"content":{"rendered":"<div class=\"jig-ncbiinpagenav\" data-jigconfig=\"smoothScroll: false, allHeadingLevels: ['h2'], headingExclude: ':hidden,.nomenu'\" id=\"ui-ncbiinpagenav-1\">\n<div class=\"fm-sec half_rhythm no_top_margin\">\n<div class=\"fm-flexbox\">\n<div class=\"fm-citation\">\n<div class=\"citation-default\">\n<div class=\"part1\"><span role=\"menubar\"><a href=\"#\" role=\"menuitem\" aria-expanded=\"false\" aria-haspopup=\"true\">Biomark Insights.<\/a><\/span> 2009; 4: 27\u201332. <\/div>\n<div class=\"part2\"><span class=\"fm-vol-iss-date\">Published online 2009 Feb 9. <\/span>  <span class=\"doi\"><span>doi:&nbsp;<\/span><a href=\"\/\/doi.org\/10.4137%2Fbmi.s2209\" target=\"_blank\" rel=\"noopener noreferrer\" ref=\"reftype=other&amp;article-id=2716677&amp;issue-id=180441&amp;journal-id=906&amp;FROM=Article%7CFront%20Matter&amp;TO=Content%20Provider%7CCrosslink%7CDOI\">10.4137\/bmi.s2209<\/a><\/span><\/div>\n<\/div>\n<\/div>\n<div class=\"fm-ids\">\n<div class=\"fm-citation-pmcid\"><span class=\"fm-citation-ids-label\">PMCID: <\/span><span>PMC2716677<\/span><\/div>\n<div class=\"fm-citation-pmid\">PMID: <a href=\"https:\/\/pubmed.ncbi.nlm.nih.gov\/19652760\">19652760<\/a><\/div>\n<\/div>\n<\/div>\n<h1 class=\"content-title\">Breath Hydrogen Produced by Ingestion of Commercial Hydrogen Water and Milk<\/h1>\n<div class=\"half_rhythm\">\n<div class=\"contrib-group fm-author\"><a href=\"https:\/\/pubmed.ncbi.nlm.nih.gov\/?term=Shimouchi%20A%5BAuthor%5D\" class=\"affpopup\" co-rid=\"_co_idm140052516233744\" co-class=\"co-affbox\">Akito Shimouchi<\/a>,<sup>1<\/sup><sup><\/sup> <a href=\"https:\/\/pubmed.ncbi.nlm.nih.gov\/?term=Nose%20K%5BAuthor%5D\" class=\"affpopup\" co-rid=\"_co_idm140052515417024\" co-class=\"co-affbox\">Kazutoshi Nose<\/a>,<sup>1<\/sup> <a href=\"https:\/\/pubmed.ncbi.nlm.nih.gov\/?term=Yamaguchi%20M%5BAuthor%5D\" class=\"affpopup\" co-rid=\"_co_idm140052519132720\" co-class=\"co-affbox\">Makoto Yamaguchi<\/a>,<sup>2<\/sup> <a href=\"https:\/\/pubmed.ncbi.nlm.nih.gov\/?term=Ishiguro%20H%5BAuthor%5D\" class=\"affpopup\" co-rid=\"_co_idm140052503143904\" co-class=\"co-affbox\">Hiroshi Ishiguro<\/a>,<sup>2<\/sup> and  <a href=\"https:\/\/pubmed.ncbi.nlm.nih.gov\/?term=Kondo%20T%5BAuthor%5D\" class=\"affpopup\" co-rid=\"_co_idm140052513573360\" co-class=\"co-affbox\">Takaharu Kondo<\/a><sup>2<\/sup><\/div>\n<div style=\"display:none\" class=\"contrib-group aff-tip\">\n<div id=\"_co_idm140052516233744\">\n<h3 class=\"no_margin\">Akito Shimouchi<\/h3>\n<p><sup>1<\/sup> Department of Etiology and Pathogenesis, National Cardiovascular Center Research Institute, Japan<\/p>\n<div>Find articles by <a href=\"https:\/\/pubmed.ncbi.nlm.nih.gov\/?term=Shimouchi%20A%5BAuthor%5D\">Akito Shimouchi<\/a><\/div>\n<\/div>\n<div id=\"_co_idm140052515417024\">\n<h3 class=\"no_margin\">Kazutoshi Nose<\/h3>\n<p><sup>1<\/sup> Department of Etiology and Pathogenesis, National Cardiovascular Center Research Institute, Japan<\/p>\n<div>Find articles by <a href=\"https:\/\/pubmed.ncbi.nlm.nih.gov\/?term=Nose%20K%5BAuthor%5D\">Kazutoshi Nose<\/a><\/div>\n<\/div>\n<div id=\"_co_idm140052519132720\">\n<h3 class=\"no_margin\">Makoto Yamaguchi<\/h3>\n<p><sup>2<\/sup> Research Center of Health, Physical Fitness and Sports, Nagoya University, Japan<\/p>\n<div>Find articles by <a href=\"https:\/\/pubmed.ncbi.nlm.nih.gov\/?term=Yamaguchi%20M%5BAuthor%5D\">Makoto Yamaguchi<\/a><\/div>\n<\/div>\n<div id=\"_co_idm140052503143904\">\n<h3 class=\"no_margin\">Hiroshi Ishiguro<\/h3>\n<p><sup>2<\/sup> Research Center of Health, Physical Fitness and Sports, Nagoya University, Japan<\/p>\n<div>Find articles by <a href=\"https:\/\/pubmed.ncbi.nlm.nih.gov\/?term=Ishiguro%20H%5BAuthor%5D\">Hiroshi Ishiguro<\/a><\/div>\n<\/div>\n<div id=\"_co_idm140052513573360\">\n<h3 class=\"no_margin\">Takaharu Kondo<\/h3>\n<p><sup>2<\/sup> Research Center of Health, Physical Fitness and Sports, Nagoya University, Japan<\/p>\n<div>Find articles by <a href=\"https:\/\/pubmed.ncbi.nlm.nih.gov\/?term=Kondo%20T%5BAuthor%5D\">Takaharu Kondo<\/a><\/div>\n<\/div>\n<\/div>\n<\/div>\n<div class=\"half_rhythm\">\n<div class=\"togglers fm-copyright-license\"><a href=\"#\" class=\"pmctoggle\" rid=\"idm140052517455168_ai\">Author information<\/a> <a href=\"#\" class=\"pmctoggle\" rid=\"idm140052517455168_cpl\">Copyright and License information<\/a> <a href=\"\/pmc\/about\/disclaimer\/\" style=\"margin-left: 1em\">PMC Disclaimer<\/a><\/div>\n<div class=\"fm-authors-info hide half_rhythm\" id=\"idm140052517455168_ai\" style=\"display:none\">\n<div class=\"fm-affl\" id=\"af1-bmi-2009-027\"><sup>1<\/sup> Department of Etiology and Pathogenesis, National Cardiovascular Center Research Institute, Japan<\/div>\n<div class=\"fm-affl\" id=\"af2-bmi-2009-027\"><sup>2<\/sup> Research Center of Health, Physical Fitness and Sports, Nagoya University, Japan<\/div>\n<div id=\"c1-bmi-2009-027\">Correspondence: Akito Shimouchi, 5-7-1, Fujishiro-dai, Suita, Osaka 565-8565, Japan. Email:<br \/>\n<a href=\"mailto:dev@null\" data-email=\"pj.og.cvcn.ser@cuomihsa\" class=\"oemail\">pj.og.cvcn.ser@cuomihsa<\/a><\/div>\n<\/div>\n<div class=\"fm-article-notes half_rhythm\"><\/div>\n<div class=\"permissions half_rhythm hide\" id=\"idm140052517455168_cpl\" style=\"display:none\">\n<div class=\"fm-copyright half_rhythm\"><a href=\"\/pmc\/about\/copyright\/\">Copyright<\/a> \u00a9 2009 by the authors<\/div>\n<div class=\"license half_rhythm\">This article is an open-access article distributed under the terms and conditions of the Creative Commons Attribution license (<a href=\"http:\/\/creativecommons.org\/licenses\/by\/3.0\/\" data-ga-action=\"click_feat_suppl\" ref=\"reftype=extlink&amp;article-id=2716677&amp;issue-id=180441&amp;journal-id=906&amp;FROM=Article%7CFront%20Matter&amp;TO=External%7CLink%7CURI\" target=\"_blank\" rel=\"noopener\">http:\/\/creativecommons.org\/licenses\/by\/3.0\/<\/a>).<\/div>\n<\/div>\n<\/div>\n<div id=\"pmclinksbox\" class=\"links-box whole_rhythm hidden\" role=\"complementary\" aria-label=\"Related or updated information about this article.\"><\/div>\n<\/div>\n<div class=\"sec\"><\/div>\n<div id=\"abstract-a.e.b.o\" lang=\"en\" class=\"tsec sec\">\n<div class=\"goto jig-ncbiinpagenav-goto-container\"><span role=\"menubar\"><a class=\"tgt_dark page-toc-label jig-ncbiinpagenav-goto-heading\" href=\"#\" title=\"Go to other sections in this page\" role=\"menuitem\" aria-expanded=\"false\" aria-haspopup=\"true\">Go to:<\/a><\/span><\/div>\n<h2 class=\"head no_bottom_margin ui-helper-clearfix\" id=\"abstract-a.e.b.otitle\">Abstract<\/h2>\n<p><!--article-meta--><\/p>\n<div>\n<div id=\"sec-a.e.b.o.a\" class=\"sec sec-first\">\n<h3 id=\"sec-a.e.b.o.atitle\">Objective<\/h3>\n<p class=\"p p-first-last\">To compare how and to what extent ingestion of hydrogen water and milk increase breath hydrogen in adults.<\/p>\n<\/div>\n<div id=\"sec-a.e.b.o.b\" class=\"sec\">\n<h3 id=\"sec-a.e.b.o.btitle\">Methods<\/h3>\n<p class=\"p p-first-last\">Five subjects without specific diseases, ingested distilled or hydrogen water and milk as a reference material that could increase breath hydrogen. Their end-alveolar breath hydrogen was measured.<\/p>\n<\/div>\n<div id=\"sec-a.e.b.o.c\" class=\"sec\">\n<h3 id=\"sec-a.e.b.o.ctitle\">Results<\/h3>\n<p class=\"p p-first-last\">Ingestion of hydrogen water rapidly increased breath hydrogen to the maximal level of approximately 40 ppm 10\u201315 min after ingestion and thereafter rapidly decreased to the baseline level, whereas ingestion of the same amount of distilled water did not change breath hydrogen (p &lt; 0.001). Ingestion of hydrogen water increased both hydrogen peaks and the area under the curve (AUC) of breath hydrogen in a dose-dependent manner. Ingestion of milk showed a delayed and sustained increase of breath hydrogen in subjects with milk intolerance for up to 540 min. Ingestion of hydrogen water produced breath hydrogen at AUC levels of 2 to 9 ppm hour, whereas milk increased breath hydrogen to AUC levels of 164 ppm hour for 540 min after drinking.<\/p>\n<\/div>\n<div id=\"sec-a.e.b.o.d\" class=\"sec sec-last\">\n<h3 id=\"sec-a.e.b.o.dtitle\">Conclusion<\/h3>\n<p class=\"p p-first-last\">Hydrogen water caused a rapid increase in breath hydrogen in a dose-dependent manner; however, the rise in breath hydrogen was not sustained compared with milk.<\/p>\n<\/div>\n<\/div>\n<div class=\"sec\"><strong class=\"kwd-title\">Keywords: <\/strong><span class=\"kwd-text\">breath hydrogen, hydrogen water, milk, colonic fermentation<\/span><\/div>\n<\/div>\n<div id=\"sec-a.f.a\" class=\"tsec sec\">\n<div class=\"goto jig-ncbiinpagenav-goto-container\"><a class=\"tgt_dark page-toc-label jig-ncbiinpagenav-goto-heading\" href=\"#\" title=\"Go to other sections in this page\" role=\"button\" aria-expanded=\"false\" aria-haspopup=\"true\">Go to:<\/a><\/div>\n<h2 class=\"head no_bottom_margin ui-helper-clearfix\" id=\"sec-a.f.atitle\">Introduction<\/h2>\n<p class=\"p p-first\">It is widely accepted that breath hydrogen reflects carbohydrate fermentation in the colon.<sup><a href=\"#b1-bmi-2009-027\" rid=\"b1-bmi-2009-027\" class=\" bibr popnode\" role=\"button\" aria-expanded=\"false\" aria-haspopup=\"true\">1<\/a><\/sup><sup>\u2013<\/sup><sup><a href=\"#b4-bmi-2009-027\" rid=\"b4-bmi-2009-027\" class=\" bibr popnode\" role=\"button\" aria-expanded=\"false\" aria-haspopup=\"true\">4<\/a><\/sup> When unabsorbed carbohydrate enters the colon, it is rapidly fermented to produce short chain fatty acids by anaerobic colonic bacteria and liberates carbon dioxide, hydrogen, and in some people, methane. Analysis of breath hydrogen measures the small bowel transit time,<sup><a href=\"#b5-bmi-2009-027\" rid=\"b5-bmi-2009-027\" class=\" bibr popnode\" role=\"button\" aria-expanded=\"false\" aria-haspopup=\"true\">5<\/a><\/sup> colonic fermentation, abnormal fermentation, galactose and\/or lactose intolerance,<sup><a href=\"#b6-bmi-2009-027\" rid=\"b6-bmi-2009-027\" class=\" bibr popnode\" role=\"button\" aria-expanded=\"false\" aria-haspopup=\"true\">6<\/a><\/sup> and sometimes irritable bowel syndrome.<sup><a href=\"#b4-bmi-2009-027\" rid=\"b4-bmi-2009-027\" class=\" bibr popnode\" role=\"button\" aria-expanded=\"false\" aria-haspopup=\"true\">4<\/a><\/sup> Thus, breath hydrogen has been recognized as \u201ca negative breath marker\u201d.<\/p>\n<p>Recent studies revealed that hydrogen gas plays an important role in inactivating oxidative stresses such as hydroxyl radicals in animal models of cerebral infarction,<sup><a href=\"#b7-bmi-2009-027\" rid=\"b7-bmi-2009-027\" class=\" bibr popnode\" role=\"button\" aria-expanded=\"false\" aria-haspopup=\"true\">7<\/a><\/sup> hepatic injury<sup><a href=\"#b8-bmi-2009-027\" rid=\"b8-bmi-2009-027\" class=\" bibr popnode\" role=\"button\" aria-expanded=\"false\" aria-haspopup=\"true\">8<\/a><\/sup> and myocardial ischemia-reperfusion injury.<sup><a href=\"#b9-bmi-2009-027\" rid=\"b9-bmi-2009-027\" class=\" bibr popnode\" role=\"button\" aria-expanded=\"false\" aria-haspopup=\"true\">9<\/a><\/sup> Very recently, it has been reported that continuous consumption of hydrogen water reduces oxidative stress in the brain, and prevents stress-induced decline in learning and memory caused by chronic physical restraint.<sup><a href=\"#b10-bmi-2009-027\" rid=\"b10-bmi-2009-027\" class=\" bibr popnode\" role=\"button\" aria-expanded=\"false\" aria-haspopup=\"true\">10<\/a><\/sup> These reports suggest that breath hydrogen, originating mostly from colonic fermentation, may be an anti-oxidative marker, provided that molecular hydrogen, produced as a by-product of colonic fermentation, acts as a reducing agent.<sup><a href=\"#b11-bmi-2009-027\" rid=\"b11-bmi-2009-027\" class=\" bibr popnode\" role=\"button\" aria-expanded=\"false\" aria-haspopup=\"true\">11<\/a><\/sup><\/p>\n<p>Since hydrogen solubility in water at 25 \u00b0C is 0.0176 vol gas STP\/vol liquid at 1 atm partial pressure,<sup><a href=\"#b12-bmi-2009-027\" rid=\"b12-bmi-2009-027\" class=\" bibr popnode\" role=\"button\" aria-expanded=\"false\" aria-haspopup=\"true\">12<\/a><\/sup> which is lower than that of oxygen and carbon dioxide and higher than that of nitrogen,<sup><a href=\"#b13-bmi-2009-027\" rid=\"b13-bmi-2009-027\" class=\" bibr popnode\" role=\"button\" aria-expanded=\"false\" aria-haspopup=\"true\">13<\/a><\/sup> it is easily calculated that hydrogen-saturated water contains 0.79 mM of hydrogen at 25 \u00b0C. Countless commercial hydrogen water products are marketed mostly in Japan as health-oriented water. However, clinical evidence regarding hydrogen water is slight, except for a recent clinical trial for type 2 diabetes mellitus,<sup><a href=\"#b14-bmi-2009-027\" rid=\"b14-bmi-2009-027\" class=\" bibr popnode\" role=\"button\" aria-expanded=\"false\" aria-haspopup=\"true\">14<\/a><\/sup> which did not report detailed alterations of breath hydrogen after drinking it and, a comparison was not made with reference foods or changes of breath hydrogen after everyday diet.<\/p>\n<p class=\"p p-last\">In the present study, in order to examine whether ingestion of commercial hydrogen water increased breath hydrogen and the duration for which it was maintained, the effects of hydrogen water on breath hydrogen was examined. The effect of milk ingestion on breath hydrogen was also examined for comparison as milk increases breath hydrogen.<sup><a href=\"#b15-bmi-2009-027\" rid=\"b15-bmi-2009-027\" class=\" bibr popnode\" role=\"button\" aria-expanded=\"false\" aria-haspopup=\"true\">15<\/a><\/sup><\/p>\n<\/div>\n<div id=\"sec-a.f.b\" class=\"tsec sec\">\n<div class=\"goto jig-ncbiinpagenav-goto-container\"><a class=\"tgt_dark page-toc-label jig-ncbiinpagenav-goto-heading\" href=\"#\" title=\"Go to other sections in this page\" role=\"button\" aria-expanded=\"false\" aria-haspopup=\"true\">Go to:<\/a><\/div>\n<h2 class=\"head no_bottom_margin ui-helper-clearfix\" id=\"sec-a.f.btitle\">Materials and Methods<\/h2>\n<div id=\"sec-a.f.b.b\" class=\"sec sec-first\">\n<h3 id=\"sec-a.f.b.btitle\">Materials<\/h3>\n<p class=\"p p-first-last\">Commercial hydrogen water was purchased at the general consumer level and fresh hydrogen water (0.6 mM) was obtained from Blue Mercury Inc. (Tokyo, Japan). Hydrogen water was made by dissolving hydrogen into water under high pressure, as described by Nagata et al.<sup><a href=\"#b10-bmi-2009-027\" rid=\"b10-bmi-2009-027\" class=\" bibr popnode\" role=\"button\" aria-expanded=\"false\" aria-haspopup=\"true\">10<\/a><\/sup> Hydrogen concentration was analyzed for each experiment and ranged from 0.21 to 0.58 mM. Hydrogen water contains sodium 1.4 mg\/dl; calcium 1.3 mg\/dl; potassium 0.4 mg\/dl; and magnesium 1.1 mg\/dl without protein, carbohydrates and lipids (total energy: 0 kcal). Commercial milk was purchased from Morinaga Milk Industry Co. Ltd. (Tokyo, Japan). Milk contains protein 3.3 g\/dl; lipid 3.8 g\/dl; carbohydrates 4.75 g\/dl; sodium 42.5 mg\/dl; and calcium 113.5 mg\/dl (total energy of 66.5 kcal\/dl). Because cold stimulation<sup><a href=\"#b16-bmi-2009-027\" rid=\"b16-bmi-2009-027\" class=\" bibr popnode\" role=\"button\" aria-expanded=\"false\" aria-haspopup=\"true\">16<\/a><\/sup> and cold milk<sup><a href=\"#b17-bmi-2009-027\" rid=\"b17-bmi-2009-027\" class=\" bibr popnode\" role=\"button\" aria-expanded=\"false\" aria-haspopup=\"true\">17<\/a><\/sup> enhance colonic motility and a rise in breath hydrogen, room temperature and test items for ingestion were kept at 25 \u00b0C.<\/p>\n<\/div>\n<div id=\"sec-a.f.b.c\" class=\"sec\">\n<h3 id=\"sec-a.f.b.ctitle\">Subjects<\/h3>\n<p class=\"p p-first-last\">Five healthy adult volunteers (two men and three women: mean age 29 \u00b1 14 years) participated in this study. They did not have any specific diseases based on detailed questionnaires and examination by physicians. The subjects randomly volunteered to be assigned to consecutive studies from experiment one to three. All the subjects eventually showed lactose deficiency as described below, possibly due to the high incidence of lactose deficiency in Japanese people.<sup><a href=\"#b18-bmi-2009-027\" rid=\"b18-bmi-2009-027\" class=\" bibr popnode\" role=\"button\" aria-expanded=\"false\" aria-haspopup=\"true\">18<\/a><\/sup><\/p>\n<\/div>\n<div id=\"sec-a.f.b.d\" class=\"sec\">\n<h3 id=\"sec-a.f.b.dtitle\">Experimental protocol<\/h3>\n<p class=\"p p-first\">The subjects refrained from food, supplements and drugs, except water, for at least 15 hours before the experiments. On the day of the experiment, the subjects rested in the sitting position for at least 30 min and then drank 300 ml of milk, hydrogen water or distilled water within one min. Immediately after drinking, the subjects rinsed their oral cavity with 50 ml of distilled water. End-alveolar breath was obtained in a breath sampling bag (300 ml volume, Otsuka Pharm. Co. Ltd, Tokyo, Japan) every 5 min from 30 min before drinking until the end of each experiment as described below. All subjects underwent training to obtain end-alveolar breath before these experiments.<\/p>\n<div id=\"sec-a.f.b.d.c\" class=\"sec\">\n<h4 id=\"sec-a.f.b.d.ctitle\" class=\"inline\">Experiment 1 <\/h4>\n<p class=\"p p-first-last\">For the dose-response experiment, hydrogen water for general consumers was used within one week after shipping. Hydrogen concentration was 0.40 \u00b1 0.07 mM (N = 18). Three subjects had hydrogen water in volumes of 100, 200 and 300 ml every hour, with two repetitions.<\/p>\n<\/div>\n<div id=\"sec-a.f.b.d.d\" class=\"sec\">\n<h4 id=\"sec-a.f.b.d.dtitle\" class=\"inline\">Experiment 2 <\/h4>\n<p class=\"p p-first-last\">To confirm that breath hydrogen originates from hydrogen water, five subjects had 300 ml of distilled water and then changes in breath hydrogen were observed for 90 min. After an hour , the same subject ingested hydrogen water (0.4 mM).<\/p>\n<\/div>\n<div id=\"sec-a.f.b.d.e\" class=\"sec sec-last\">\n<h4 id=\"sec-a.f.b.d.etitle\" class=\"inline\">Experiment 3 <\/h4>\n<p class=\"p p-first-last\">To compare the hydrogen-producing capability of hydrogen water and milk, four subjects had 300 ml of milk and their breath hydrogen was monitored for up to 540 min. On separate experimental days, the same two subjects drank 300 ml of hydrogen water and repeated the same protocols at three different concentration levels (0.21, 0.41 and 0.58 mM) of hydrogen water.<\/p>\n<\/div>\n<\/div>\n<div id=\"sec-a.f.b.e\" class=\"sec\">\n<h3 id=\"sec-a.f.b.etitle\">Breath sampling and analysis<\/h3>\n<p class=\"p p-first-last\">The breath was immediately transferred to a gas-tight glass syringe and 1 ml was injected into the gas chromatograph with a semiconductor detector (TRIlyzer mBA\u20133000, Taiyo Ltd, Osaka, Japan) to measure breath hydrogen. Breath concentrations of each gas were calculated by subtracting ambient air collected in the same sampling bag. Hydrogen concentration of the milk, distilled or hydrogen water at 25 \u00b0C were measured for each subject by head-space gas sampling in a sealed glass vial with a small amount of the materials. Analysis was performed using the same sensor as mentioned above.<\/p>\n<\/div>\n<div id=\"sec-a.f.b.f\" class=\"sec sec-last\">\n<h3 id=\"sec-a.f.b.ftitle\">Statistics<\/h3>\n<p class=\"p p-first-last\">Statistical values are expressed as the mean \u00b1 standard deviations of the mean. Statistical analysis was performed by a paired t-test or two-way analysis of variance and significance was accepted at p &lt; 0.05.<\/p>\n<\/div>\n<\/div>\n<div id=\"sec-a.f.c\" class=\"tsec sec\">\n<div class=\"goto jig-ncbiinpagenav-goto-container\"><a class=\"tgt_dark page-toc-label jig-ncbiinpagenav-goto-heading\" href=\"#\" title=\"Go to other sections in this page\" role=\"button\" aria-expanded=\"false\" aria-haspopup=\"true\">Go to:<\/a><\/div>\n<h2 class=\"head no_bottom_margin ui-helper-clearfix\" id=\"sec-a.f.ctitle\">Results<\/h2>\n<div id=\"sec-a.f.c.b\" class=\"sec sec-first\">\n<h3 id=\"sec-a.f.c.btitle\">Experiment 1<\/h3>\n<p class=\"p p-first-last\">Hydrogen water significantly increased both hydrogen peak (r = 0.735, p = 0.001) and the area under the curve (AUC) of breath hydrogen (r = 0.855, p &lt; 0.001) in a dose-dependent manner (<a href=\"https:\/\/www.ncbi.nlm.nih.gov\/pmc\/articles\/PMC2716677\/figure\/f1-bmi-2009-027\/\" target=\"figure\" class=\"fig-table-link figpopup\" rid-figpopup=\"f1-bmi-2009-027\" rid-ob=\"ob-f1-bmi-2009-027\" co-legend-rid=\"lgnd_f1-bmi-2009-027\" rel=\"noopener\"><span>Fig. 1<\/span><\/a>).<\/p>\n<p><!--fig ft0--><!--fig mode=article f1--><\/p>\n<div class=\"fig iconblock whole_rhythm\" id=\"f1-bmi-2009-027\" co-legend-rid=\"lgnd_f1-bmi-2009-027\"><a href=\"https:\/\/www.ncbi.nlm.nih.gov\/pmc\/articles\/PMC2716677\/figure\/f1-bmi-2009-027\/\" target=\"figure\" rid-figpopup=\"f1-bmi-2009-027\" rid-ob=\"ob-f1-bmi-2009-027\" rel=\"noopener\"><!--fig\/graphic|fig\/alternatives\/graphic mode=\"anchored\" m1--><\/a><\/p>\n<div class=\"figure\" data-largeobj=\"\" data-largeobj-link-rid=\"largeobj_idm140052519028848\"><a href=\"https:\/\/www.ncbi.nlm.nih.gov\/pmc\/articles\/PMC2716677\/figure\/f1-bmi-2009-027\/\" target=\"figure\" rid-figpopup=\"f1-bmi-2009-027\" rid-ob=\"ob-f1-bmi-2009-027\" rel=\"noopener\"><\/a><a class=\"inline_block ts_canvas\" href=\"\/core\/lw\/2.0\/html\/tileshop_pmc\/tileshop_pmc_inline.html?title=Click%20on%20image%20to%20zoom&amp;p=PMC3&amp;id=2716677_bmi-2009-027f1.jpg\" target=\"tileshopwindow\" rel=\"noopener\"><\/p>\n<div class=\"ts_bar small\" title=\"Click on image to zoom\"><\/div>\n<p><img decoding=\"async\" loading=\"lazy\" alt=\"An external file that holds a picture, illustration, etc.\nObject name is bmi-2009-027f1.jpg\" title=\"Click on image to zoom\" class=\"tileshop\" src=\"https:\/\/hho-bulgaria.com\/wp-content\/uploads\/2024\/01\/bmi-2009-027f1.jpg\"><\/a><\/div>\n<div class=\"largeobj-link align_right\" id=\"largeobj_idm140052519028848\" style=\"display: none;\"><a target=\"object\" rel=\"noopener\" href=\"https:\/\/www.ncbi.nlm.nih.gov\/pmc\/articles\/PMC2716677\/figure\/f1-bmi-2009-027\/?report=objectonly\">Open in a separate window<\/a><\/div>\n<div class=\"icnblk_cntnt\" id=\"lgnd_f1-bmi-2009-027\">\n<div><a class=\"figpopup\" href=\"https:\/\/www.ncbi.nlm.nih.gov\/pmc\/articles\/PMC2716677\/figure\/f1-bmi-2009-027\/\" target=\"figure\" rid-figpopup=\"f1-bmi-2009-027\" rid-ob=\"ob-f1-bmi-2009-027\" rel=\"noopener\">Figure 1<\/a><\/div>\n<p><!--caption a7--><\/p>\n<div class=\"caption\">\n<p>Increase in breath hydrogen and the area under the curve (AUC) of breath hydrogen for 60 min after ingestion were significantly correlated to hydrogen dosage (r = 0.735, p = 0.001; r = 0.855, p &lt; 0.001, respectively). The data were obtained from 3 subjects in duplication by ingestion of 100, 200 and 300 ml of hydrogen water. Hydrogen concentrations of ingestion water for each subject were measured simultaneously.<\/p>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<div id=\"sec-a.f.c.c\" class=\"sec\">\n<h3 id=\"sec-a.f.c.ctitle\">Experiment 2<\/h3>\n<p class=\"p p-first-last\">Effects of distilled and hydrogen water on breath hydrogen were compared. Ingestion of hydrogen water (0.4 mM) rapidly increased breath hydrogen to the maximal level of 36 ppm 15 min after ingestion and thereafter rapidly decreased to the baseline level, whereas the same amount of distilled water ingestion did not change breath hydrogen (ANOVA, p &lt; 0.001, <a href=\"https:\/\/www.ncbi.nlm.nih.gov\/pmc\/articles\/PMC2716677\/figure\/f2-bmi-2009-027\/\" target=\"figure\" class=\"fig-table-link figpopup\" rid-figpopup=\"f2-bmi-2009-027\" rid-ob=\"ob-f2-bmi-2009-027\" co-legend-rid=\"lgnd_f2-bmi-2009-027\" rel=\"noopener\"><span>Fig. 2<\/span><\/a>).<\/p>\n<p><!--fig ft0--><!--fig mode=article f1--><\/p>\n<div class=\"fig iconblock whole_rhythm\" id=\"f2-bmi-2009-027\" co-legend-rid=\"lgnd_f2-bmi-2009-027\"><a href=\"https:\/\/www.ncbi.nlm.nih.gov\/pmc\/articles\/PMC2716677\/figure\/f2-bmi-2009-027\/\" target=\"figure\" rid-figpopup=\"f2-bmi-2009-027\" rid-ob=\"ob-f2-bmi-2009-027\" rel=\"noopener\"><!--fig\/graphic|fig\/alternatives\/graphic mode=\"anchored\" m1--><\/a><\/p>\n<div class=\"figure\" data-largeobj=\"\" data-largeobj-link-rid=\"largeobj_idm140052520883424\"><a href=\"https:\/\/www.ncbi.nlm.nih.gov\/pmc\/articles\/PMC2716677\/figure\/f2-bmi-2009-027\/\" target=\"figure\" rid-figpopup=\"f2-bmi-2009-027\" rid-ob=\"ob-f2-bmi-2009-027\" rel=\"noopener\"><\/a><a class=\"inline_block ts_canvas\" href=\"\/core\/lw\/2.0\/html\/tileshop_pmc\/tileshop_pmc_inline.html?title=Click%20on%20image%20to%20zoom&amp;p=PMC3&amp;id=2716677_bmi-2009-027f2.jpg\" target=\"tileshopwindow\" rel=\"noopener\"><\/p>\n<div class=\"ts_bar small\" title=\"Click on image to zoom\"><\/div>\n<p><img decoding=\"async\" loading=\"lazy\" alt=\"An external file that holds a picture, illustration, etc.\nObject name is bmi-2009-027f2.jpg\" title=\"Click on image to zoom\" class=\"tileshop\" src=\"https:\/\/hho-bulgaria.com\/wp-content\/uploads\/2024\/01\/bmi-2009-027f2.jpg\"><\/a><\/div>\n<div class=\"largeobj-link align_right\" id=\"largeobj_idm140052520883424\" style=\"display: none;\"><a target=\"object\" rel=\"noopener\" href=\"https:\/\/www.ncbi.nlm.nih.gov\/pmc\/articles\/PMC2716677\/figure\/f2-bmi-2009-027\/?report=objectonly\">Open in a separate window<\/a><\/div>\n<div class=\"icnblk_cntnt\" id=\"lgnd_f2-bmi-2009-027\">\n<div><a class=\"figpopup\" href=\"https:\/\/www.ncbi.nlm.nih.gov\/pmc\/articles\/PMC2716677\/figure\/f2-bmi-2009-027\/\" target=\"figure\" rid-figpopup=\"f2-bmi-2009-027\" rid-ob=\"ob-f2-bmi-2009-027\" rel=\"noopener\">Figure 2<\/a><\/div>\n<p><!--caption a7--><\/p>\n<div class=\"caption\">\n<p>Changes in breath hydrogen after ingestion of distilled water (300 ml, open circle) and hydrogen water (300 ml, 0.4 mM hydrogen, closed circle) in 5 subjects. The difference between the two groups is significant (p &lt; 0.001, two-way analysis of variance).<\/p>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<div id=\"sec-a.f.c.d\" class=\"sec sec-last\">\n<h3 id=\"sec-a.f.c.dtitle\">Experiment 3<\/h3>\n<p class=\"p p-first-last\">Effects of hydrogen water and milk on breath hydrogen for up to 540 min are shown in <a href=\"https:\/\/www.ncbi.nlm.nih.gov\/pmc\/articles\/PMC2716677\/figure\/f3-bmi-2009-027\/\" target=\"figure\" class=\"fig-table-link figpopup\" rid-figpopup=\"f3-bmi-2009-027\" rid-ob=\"ob-f3-bmi-2009-027\" co-legend-rid=\"lgnd_f3-bmi-2009-027\" rel=\"noopener\"><span>Figure 3<\/span><\/a>. Ingestion of milk exhibited a delayed and sustained increase of breath hydrogen in subjects with hypolactasia for up to 540 min, during which subjects complained of few bowel symptoms, except normal evacuation in one subject, while those who had hydrogen water showed only an initial increase in breath hydrogen. (<a href=\"https:\/\/www.ncbi.nlm.nih.gov\/pmc\/articles\/PMC2716677\/figure\/f3-bmi-2009-027\/\" target=\"figure\" class=\"fig-table-link figpopup\" rid-figpopup=\"f3-bmi-2009-027\" rid-ob=\"ob-f3-bmi-2009-027\" co-legend-rid=\"lgnd_f3-bmi-2009-027\" rel=\"noopener\"><span>Fig. 3<\/span><\/a>). To assess hydrogen production, AUC of breath hydrogen for 540 min after ingestion, subtracting the baseline breath hydrogen, was calculated. Hydrogen water produced breath hydrogen at AUC levels of 2 to 9 ppm hour, whereas milk significantly increased breath hydrogen to AUC levels of 164 ppm hour for 540 min after drinking.<\/p>\n<p><!--fig ft0--><!--fig mode=article f1--><\/p>\n<div class=\"fig iconblock whole_rhythm\" id=\"f3-bmi-2009-027\" co-legend-rid=\"lgnd_f3-bmi-2009-027\"><a href=\"https:\/\/www.ncbi.nlm.nih.gov\/pmc\/articles\/PMC2716677\/figure\/f3-bmi-2009-027\/\" target=\"figure\" rid-figpopup=\"f3-bmi-2009-027\" rid-ob=\"ob-f3-bmi-2009-027\" rel=\"noopener\"><!--fig\/graphic|fig\/alternatives\/graphic mode=\"anchored\" m1--><\/a><\/p>\n<div class=\"figure\" data-largeobj=\"\" data-largeobj-link-rid=\"largeobj_idm140052505178128\"><a href=\"https:\/\/www.ncbi.nlm.nih.gov\/pmc\/articles\/PMC2716677\/figure\/f3-bmi-2009-027\/\" target=\"figure\" rid-figpopup=\"f3-bmi-2009-027\" rid-ob=\"ob-f3-bmi-2009-027\" rel=\"noopener\"><\/a><a class=\"inline_block ts_canvas\" href=\"\/core\/lw\/2.0\/html\/tileshop_pmc\/tileshop_pmc_inline.html?title=Click%20on%20image%20to%20zoom&amp;p=PMC3&amp;id=2716677_bmi-2009-027f3.jpg\" target=\"tileshopwindow\" rel=\"noopener\"><\/p>\n<div class=\"ts_bar small\" title=\"Click on image to zoom\"><\/div>\n<p><img decoding=\"async\" loading=\"lazy\" alt=\"An external file that holds a picture, illustration, etc.\nObject name is bmi-2009-027f3.jpg\" title=\"Click on image to zoom\" class=\"tileshop\" src=\"https:\/\/hho-bulgaria.com\/wp-content\/uploads\/2024\/01\/bmi-2009-027f3.jpg\"><\/a><\/div>\n<div class=\"largeobj-link align_right\" id=\"largeobj_idm140052505178128\" style=\"display: none;\"><a target=\"object\" rel=\"noopener\" href=\"https:\/\/www.ncbi.nlm.nih.gov\/pmc\/articles\/PMC2716677\/figure\/f3-bmi-2009-027\/?report=objectonly\">Open in a separate window<\/a><\/div>\n<div class=\"icnblk_cntnt\" id=\"lgnd_f3-bmi-2009-027\">\n<div><a class=\"figpopup\" href=\"https:\/\/www.ncbi.nlm.nih.gov\/pmc\/articles\/PMC2716677\/figure\/f3-bmi-2009-027\/\" target=\"figure\" rid-figpopup=\"f3-bmi-2009-027\" rid-ob=\"ob-f3-bmi-2009-027\" rel=\"noopener\">Figure 3<\/a><\/div>\n<p><!--caption a7--><\/p>\n<div class=\"caption\">\n<p>Time course of breath hydrogen by milk (N = 4) and hydrogen water (N = 2 for 0.21, 0.41 and 0.58 mM hydrogen) for 540 min.<\/p>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<div id=\"sec-a.f.d\" class=\"tsec sec\">\n<div class=\"goto jig-ncbiinpagenav-goto-container\"><a class=\"tgt_dark page-toc-label jig-ncbiinpagenav-goto-heading\" href=\"#\" title=\"Go to other sections in this page\" role=\"button\" aria-expanded=\"false\" aria-haspopup=\"true\">Go to:<\/a><\/div>\n<h2 class=\"head no_bottom_margin ui-helper-clearfix\" id=\"sec-a.f.dtitle\">Discussion<\/h2>\n<p class=\"p p-first\">This study confirmed that ingestion of hydrogen water rapidly increased breath hydrogen in a mean time of 10 to 15 min from ingestion to peak breath hydrogen and that breath hydrogen increased in a dose-dependent manner. The same amount of distilled water at 25 \u00b0C did not cause a rise in breath hydrogen by the so-called gastroileal reflex;<sup><a href=\"#b19-bmi-2009-027\" rid=\"b19-bmi-2009-027\" class=\" bibr popnode\" role=\"button\" aria-expanded=\"false\" aria-haspopup=\"true\">19<\/a><\/sup><sup>,<\/sup><sup><a href=\"#b20-bmi-2009-027\" rid=\"b20-bmi-2009-027\" class=\" bibr popnode\" role=\"button\" aria-expanded=\"false\" aria-haspopup=\"true\">20<\/a><\/sup> therefore, it was concluded that a rapid rise in breath hydrogen originates from hydrogen water and that acute ingestion of hydrogen water rapidly increased hydrogen partial pressure in the upper alimentary tract, and diffused into the sub-mucosal alimentary vessels, and was finally exhaled.<\/p>\n<p>From experiment one, it was estimated that after ingestion of hydrogen water, 72% of hydrogen molecule was exhaled in breath, provided that the minute volume ventilation of the subjects with a mean body weight of 72 kg was 6 L\/min and that hydrogen concentrations in the end-tidal breath could be applied to the ventilation volume. In the preliminary experiment, it was confirmed that the loss of hydrogen poured into the cup during the first 3 min was 2%\u20135% (data not shown). Furthermore, in the recent experiment, it was estimated that after ingestion of hydrogen water, approximately 0.1% of hydrogen was released from the whole body surface and the amount was considerably negligible, which will be reported elsewhere (Nose K, Shimouchi A, et al). On the other hand, it is known that hydrogen produced by colonic fermentation is partially consumed by bacterial flora in the colon.<sup><a href=\"#b21-bmi-2009-027\" rid=\"b21-bmi-2009-027\" class=\" bibr popnode\" role=\"button\" aria-expanded=\"false\" aria-haspopup=\"true\">21<\/a><\/sup> However, breath hydrogen release was almost finished 60 min after ingestion of hydrogen water, possibly because it was unable to reach colon. Therefore, it was considered that at least 20% of ingested hydrogen was consumed in the body and that the main hydrogen consumption occurred in the liver rather than by the colonic bacteria or other organs such as the brain.<\/p>\n<p>The present study supports the conclusion that ingestion of commercial hydrogen definitely increases hydrogen concentration in the body; however, the rise in breath hydrogen was transient and the hydrogen-producing capability of hydrogen water was less than that of milk in subjects with hypolactasia. Since a higher increase in breath hydrogen was expected, fasted subjects had test items at the rate of 300 ml\/60 sec, i.e. 5 ml\/sec. However, the rise did not reach the reported level of 55 ppm by ingestion of 300 ml of hydrogen-rich water by a recent clinical trial of Kajiyama et al.<sup><a href=\"#b14-bmi-2009-027\" rid=\"b14-bmi-2009-027\" class=\" bibr popnode\" role=\"button\" aria-expanded=\"false\" aria-haspopup=\"true\">14<\/a><\/sup> Unfortunately, they did not describe the details of the ingestion methods and hydrogen concentrations. Their patients, who had type 2 diabetes mellitus had 900 ml of hydrogen-rich water per day for 8 weeks; however, their breath hydrogen levels were not reported. The discrepancy may be because the rise in breath hydrogen depended on body weight, the rate of drinking, and preconditioning of baseline levels that are seemingly affected by previous diet or fasting.<\/p>\n<p>On the other hand, Nagata et al.<sup><a href=\"#b10-bmi-2009-027\" rid=\"b10-bmi-2009-027\" class=\" bibr popnode\" role=\"button\" aria-expanded=\"false\" aria-haspopup=\"true\">10<\/a><\/sup> reported that in mice that were given hydrogen water at hydrogen concentration levels of 0.4\u20130.6 mM ad libitum, there were differences in the arteriovenous hydrogen concentrations in the blood, and concluded that hydrogen was consumed in the brain of the animals. Although continuous intake of hydrogen water may be impractical in the clinical setting, the new finding showed a new direction for therapies for acute ischemic and reperfusion injuries and prevention;<sup><a href=\"#b7-bmi-2009-027\" rid=\"b7-bmi-2009-027\" class=\" bibr popnode\" role=\"button\" aria-expanded=\"false\" aria-haspopup=\"true\">7<\/a><\/sup><sup>\u2013<\/sup><sup><a href=\"#b9-bmi-2009-027\" rid=\"b9-bmi-2009-027\" class=\" bibr popnode\" role=\"button\" aria-expanded=\"false\" aria-haspopup=\"true\">9<\/a><\/sup> however, it should be remembered that hydrogen concentration in the body strongly depends on colonic fermentation and the food consumed everyday. Therefore, further clinical studies are needed to clarify whether exogenous hydrogen, such as hydrogen inhalation or water, could contribute to the increase of hydrogen in the body, which is presumably represented by breath hydrogen.<\/p>\n<p>The same group revealed that hydrogen gas plays an important role in inactivating oxidative stresses such as hydroxyl radicals.<sup><a href=\"#b7-bmi-2009-027\" rid=\"b7-bmi-2009-027\" class=\" bibr popnode\" role=\"button\" aria-expanded=\"false\" aria-haspopup=\"true\">7<\/a><\/sup><sup>\u2013<\/sup><sup><a href=\"#b9-bmi-2009-027\" rid=\"b9-bmi-2009-027\" class=\" bibr popnode\" role=\"button\" aria-expanded=\"false\" aria-haspopup=\"true\">9<\/a><\/sup> Their recent reports gave new insight in the roles of hydrogen produced in the body, mostly by colonic fermentation. As a favorable outcome, younger women had higher concentrations of breath hydrogen at baseline levels and in their response to food, both at initial and secondary rises of breath hydrogen, than older women;<sup><a href=\"#b22-bmi-2009-027\" rid=\"b22-bmi-2009-027\" class=\" bibr popnode\" role=\"button\" aria-expanded=\"false\" aria-haspopup=\"true\">22<\/a><\/sup> therefore, it is of interest that hydrogen produced in the body, to some extent if any, also plays a role in the inactivation of oxidative stress, as low levels of inhaled hydrogen and hydrogen water ad libitum did in rats.<\/p>\n<p>Ingestion of milk in subjects with hypolactasia caused a marked and sustained rise in breath hydrogen, as shown in the present and previous studies.<sup><a href=\"#b15-bmi-2009-027\" rid=\"b15-bmi-2009-027\" class=\" bibr popnode\" role=\"button\" aria-expanded=\"false\" aria-haspopup=\"true\">15<\/a><\/sup> Approximately 70% of the world population has hypolactasia<sup><a href=\"#b23-bmi-2009-027\" rid=\"b23-bmi-2009-027\" class=\" bibr popnode\" role=\"button\" aria-expanded=\"false\" aria-haspopup=\"true\">23<\/a><\/sup> and about 90% of Japanese adults are lactase-deficient.<sup><a href=\"#b18-bmi-2009-027\" rid=\"b18-bmi-2009-027\" class=\" bibr popnode\" role=\"button\" aria-expanded=\"false\" aria-haspopup=\"true\">18<\/a><\/sup> Epidemiological studies suggested that milk and dairy decrease the risks of mortality from cerebrovascular disease or stroke.<sup><a href=\"#b24-bmi-2009-027\" rid=\"b24-bmi-2009-027\" class=\" bibr popnode\" role=\"button\" aria-expanded=\"false\" aria-haspopup=\"true\">24<\/a><\/sup><sup>\u2013<\/sup><sup><a href=\"#b26-bmi-2009-027\" rid=\"b26-bmi-2009-027\" class=\" bibr popnode\" role=\"button\" aria-expanded=\"false\" aria-haspopup=\"true\">26<\/a><\/sup> These results have often been attributed to decreases in arterial blood pressure by calcium uptake<sup><a href=\"#b27-bmi-2009-027\" rid=\"b27-bmi-2009-027\" class=\" bibr popnode\" role=\"button\" aria-expanded=\"false\" aria-haspopup=\"true\">27<\/a><\/sup> or to the reduction of platelet aggregation by short and medium chain fatty acids,<sup><a href=\"#b28-bmi-2009-027\" rid=\"b28-bmi-2009-027\" class=\" bibr popnode\" role=\"button\" aria-expanded=\"false\" aria-haspopup=\"true\">28<\/a><\/sup> of which the former is produced partially by colonic fermentation and both of which are abundant in milk and dairy food.<\/p>\n<p class=\"p p-last\">This study was performed under special conditions, refraining from unabsorbable foods before the experimental days and eating and drinking nothing except water and the test items. However, in everyday life, breath hydrogen levels fluctuate markedly, ranging from several ppm to 50 ppm or more,<sup><a href=\"#b29-bmi-2009-027\" rid=\"b29-bmi-2009-027\" class=\" bibr popnode\" role=\"button\" aria-expanded=\"false\" aria-haspopup=\"true\">29<\/a><\/sup> which is enhanced by exercise<sup><a href=\"#b30-bmi-2009-027\" rid=\"b30-bmi-2009-027\" class=\" bibr popnode\" role=\"button\" aria-expanded=\"false\" aria-haspopup=\"true\">30<\/a><\/sup> and physical and\/or mental stresses<sup><a href=\"#b16-bmi-2009-027\" rid=\"b16-bmi-2009-027\" class=\" bibr popnode\" role=\"button\" aria-expanded=\"false\" aria-haspopup=\"true\">16<\/a><\/sup> in combination with colonic fermentation. Besides milk, breath hydrogen by colonic fermentation is produced by numerous unabsorbable foods, such as commercial dietary fiber,<sup><a href=\"#b31-bmi-2009-027\" rid=\"b31-bmi-2009-027\" class=\" bibr popnode\" role=\"button\" aria-expanded=\"false\" aria-haspopup=\"true\">31<\/a><\/sup> soybean flour,<sup><a href=\"#b32-bmi-2009-027\" rid=\"b32-bmi-2009-027\" class=\" bibr popnode\" role=\"button\" aria-expanded=\"false\" aria-haspopup=\"true\">32<\/a><\/sup> and inulin and oligofructose in a number of vegetables, fruits and whole grains.<sup><a href=\"#b33-bmi-2009-027\" rid=\"b33-bmi-2009-027\" class=\" bibr popnode\" role=\"button\" aria-expanded=\"false\" aria-haspopup=\"true\">33<\/a><\/sup> Thus, hydrogen production appears to be caused naturally by everyday diet, provided there is normal bacterial flora and colonic function. Therefore, this study was conducted to see if additional intake of the commercial preparation of hydrogen water is beneficial for people without specific diseases.<\/p>\n<\/div>\n<div id=\"sec-a.f.e\" class=\"tsec sec\">\n<div class=\"goto jig-ncbiinpagenav-goto-container\"><a class=\"tgt_dark page-toc-label jig-ncbiinpagenav-goto-heading\" href=\"#\" title=\"Go to other sections in this page\" role=\"button\" aria-expanded=\"false\" aria-haspopup=\"true\">Go to:<\/a><\/div>\n<h2 class=\"head no_bottom_margin ui-helper-clearfix\" id=\"sec-a.f.etitle\">Conclusion<\/h2>\n<p class=\"p p-first-last\">Hydrogen water caused a rapid increase in breath hydrogen in a dose-dependent manner; however, the rise in breath hydrogen was not sustained compared with the same amount of milk in subjects with milk intolerance.<\/p>\n<\/div>\n<div id=\"ack-a.g.a\" class=\"tsec sec\">\n<div class=\"goto jig-ncbiinpagenav-goto-container\"><a class=\"tgt_dark page-toc-label jig-ncbiinpagenav-goto-heading\" href=\"#\" title=\"Go to other sections in this page\" role=\"button\" aria-expanded=\"false\" aria-haspopup=\"true\">Go to:<\/a><\/div>\n<h2 class=\"head no_bottom_margin ui-helper-clearfix\" id=\"ack-a.g.atitle\">Acknowledgments<\/h2>\n<div class=\"sec\">\n<p>This work was supported in part by a Grant-in-Aid (16209020) for Scientific Research from the Ministry of Education, Science, Sports and Culture of Japan. KN is a postdoctoral fellow supported by the Japanese Promotion of Science. We thank all volunteers for this study.<\/p>\n<\/div>\n<\/div>\n<div id=\"fn-group-a.g.b\" class=\"tsec sec\">\n<div class=\"goto jig-ncbiinpagenav-goto-container\"><a class=\"tgt_dark page-toc-label jig-ncbiinpagenav-goto-heading\" href=\"#\" title=\"Go to other sections in this page\" role=\"button\" aria-expanded=\"false\" aria-haspopup=\"true\">Go to:<\/a><\/div>\n<h2 class=\"head no_bottom_margin ui-helper-clearfix\" id=\"fn-group-a.g.btitle\">Footnotes<\/h2>\n<p><!--back\/fn-group--><\/p>\n<div class=\"fm-sec half_rhythm small\">\n<p class=\"fn sec\" id=\"fn-a.g.b.a\">\n<p class=\"p p-first\"><strong>Disclosure<\/strong><\/p>\n<p class=\"p p-last\">The authors report no conflicts of interest.<\/p>\n<\/p>\n<\/div>\n<\/div>\n<div id=\"ref-list-a.g.c\" class=\"tsec sec\">\n<div class=\"goto jig-ncbiinpagenav-goto-container\"><a class=\"tgt_dark page-toc-label jig-ncbiinpagenav-goto-heading\" href=\"#\" title=\"Go to other sections in this page\" role=\"button\" aria-expanded=\"false\" aria-haspopup=\"true\">Go to:<\/a><\/div>\n<h2 class=\"head no_bottom_margin ui-helper-clearfix\" id=\"ref-list-a.g.ctitle\">References<\/h2>\n<div class=\"ref-list-sec sec\" id=\"reference-list\">\n<div class=\"ref-cit-blk half_rhythm\" id=\"b1-bmi-2009-027\">1. <span class=\"mixed-citation\">Levitt MD, Ingelfinger FJ. 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Inulin and oligofructose in the dietary fibre concept. <span><span class=\"ref-journal\">Br J Nutr. <\/span>2002;<span class=\"ref-vol\">87<\/span>:S159\u201362.<\/span> [<a href=\"https:\/\/pubmed.ncbi.nlm.nih.gov\/12088513\" ref=\"reftype=pubmed&amp;article-id=2716677&amp;issue-id=180441&amp;journal-id=906&amp;FROM=Article%7CCitationRef&amp;TO=Entrez%7CPubMed%7CRecord\">PubMed<\/a>] <span class=\"nowrap\">[<a href=\"https:\/\/scholar.google.com\/scholar_lookup?journal=Br+J+Nutr&amp;title=Inulin+and+oligofructose+in+the+dietary+fibre+concept&amp;author=C+Cherbut&amp;volume=87&amp;publication_year=2002&amp;pages=S159-62&amp;pmid=12088513&amp;\" target=\"_blank\" rel=\"noopener noreferrer\" ref=\"reftype=other&amp;article-id=2716677&amp;issue-id=180441&amp;journal-id=906&amp;FROM=Article%7CCitationRef&amp;TO=Content%20Provider%7CLink%7CGoogle%20Scholar\" role=\"button\" aria-expanded=\"false\" aria-haspopup=\"true\">Google Scholar<\/a>]<\/span><\/span><\/div>\n<\/div>\n<\/div>\n<div style=\"display: none; width: 200px; top: -100px; left: -100px;\" aria-live=\"assertive\" aria-hidden=\"true\" class=\"ui-helper-reset ui-ncbipopper-wrapper ui-ncbilinksmenu\">\n<ul id=\"ui-ncbiinpagenav-2\">\n<li><a href=\"#abstract-a.e.b.otitle\">Abstract<\/a><\/li>\n<li><a href=\"#sec-a.f.atitle\">Introduction<\/a><\/li>\n<li><a href=\"#sec-a.f.btitle\">Materials and Methods<\/a><\/li>\n<li><a href=\"#sec-a.f.ctitle\">Results<\/a><\/li>\n<li><a href=\"#sec-a.f.dtitle\">Discussion<\/a><\/li>\n<li><a href=\"#sec-a.f.etitle\">Conclusion<\/a><\/li>\n<li><a href=\"#ack-a.g.atitle\">Acknowledgments<\/a><\/li>\n<li><a href=\"#fn-group-a.g.btitle\">Footnotes<\/a><\/li>\n<li><a href=\"#ref-list-a.g.ctitle\">References<\/a><\/li>\n<\/ul>\n<\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>Breath hydrogen produced by ingestion of commercial hydrogen water and milk<\/p>\n","protected":false},"author":1,"featured_media":17899,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[130],"tags":[],"disease":[862],"body-organ":[1022],"applications":[683],"test_subjects":[1519],"report-topic":[1309],"class_list":["post-27782","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-hydrogen-health","disease-hydrogen-biology-2","body-organ-whole-body-2","applications-in-vivo-biotic-production-2","test_subjects-human-2","report-topic-hydrogen-safety-2"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.1 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Hydrogen Water vs. Milk: Breath Hydrogen Levels<\/title>\n<meta name=\"description\" content=\"Breath hydrogen produced by ingestion of commercial hydrogen water and milk\" \/>\n<meta name=\"robots\" content=\"index, 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