{"id":3086,"date":"2026-08-04T13:22:03","date_gmt":"2026-08-04T11:22:03","guid":{"rendered":"https:\/\/anev.com.pl\/?p=3086"},"modified":"2026-09-23T12:57:33","modified_gmt":"2026-09-23T10:57:33","slug":"responsible-supplementation-not-every-flow-rate-corresponds-to-the-same-dose-what-is-fih%e2%82%82-in-hydrogen-inhalation","status":"publish","type":"post","link":"https:\/\/anev.com.pl\/en\/odpowiedzialna-suplementacja-nie-kazdy-przeplyw-to-ta-sama-dawka-czym-jest-fih%e2%82%82-w-inhalacji-wodorem\/","title":{"rendered":"Responsible supplementation. Not every flow rate corresponds to the same dose\u2014what is FiH\u2082 in hydrogen inhalation?."},"content":{"rendered":"
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How much hydrogen do you actually inhale? Why does the fraction matter, rather than the \u201enumber of milliliters per minute\u201d?\u201d<\/p>\n\n\n\n

Maybe you\u2019ve heard about hydrogen inhalation from your physical therapist, or you\u2019ve seen an ad for it on social media. Almost always, the first thing that catches your eye is a single number: flow rate. 600 ml\/min, 1,000 ml\/min, 1,500 ml\/min, and sometimes even more. The answer to the question that automatically pops into your head seems obvious. More = better. Except that\u2019s not the right question.<\/p>\n\n\n\n

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Imagine you\u2019re making juice from syrup. You pour the same spoonful of syrup into a small glass one time and into a large bucket of water another time. \u201eThe amount of syrup is identical, but the taste is completely different\u2014because it\u2019s the concentration that matters, not how much syrup you poured in.\u201d It\u2019s the same with hydrogen. What matters to your body isn\u2019t how much gas the device releases per minute, but how much of it ends up in the air you actually breathe in.<\/p>\n<\/div><\/div>\n\n\n\n

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Learn more<\/a><\/p>\n<\/div><\/div>\n\n\n\n

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This \u201epart\u201d has a name: FiH\u2082<\/h3>\n\n\n\n

FiH\u2082 (from English fraction of inhaled hydrogen<\/em>) refers to the fraction of hydrogen in the inhaled air\u2014that is, the very \u201econcentration,\u201d or the percentage of hydrogen in the mixture that enters your respiratory tract. This is what comes closest to what we would call the actual dose.<\/p>\n\n\n\n

And here\u2019s something that\u2019s rarely mentioned: the same flow rate in ml\/min doesn\u2019t mean the same dose for every person. A child breathes differently, a petite person breathes differently, an athlete after exercise breathes differently, and someone breathing calmly on the couch breathes differently. The same amount of gas mixes with a different amount of air in each person, so it will result in a higher hydrogen fraction in one person and a lower one in another. The label \u201e600 or 1500 ml\/min\u201d on the device alone does not settle this issue.<\/p>\n\n\n\n

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A hydrogen concentration exceeding 4% carries an inherent risk of ignition, which increases with flow rate (especially when FiH2 exceeds 4%); therefore, such configurations should be avoided.<\/p>\nTyler W. LeBaron<\/a>, \u201eRespiratory-physiology modeling of therapeutic hydrogen inhalation: defining the fraction of inspired hydrogen (FiH)2<\/sub>) and flow-rate requirements\u201d<\/a><\/cite><\/blockquote>\n\n\n\n

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That is why scientists are now proposing to reframe the question. Instead of asking, \u201eHow much gas does the device produce?\u201d it is better to ask, \u201eWhat is the actual percentage of hydrogen in what I\u2019m breathing in?\u201d. LeBaron et al. (2026) propose that FiH\u2082 be used as the primary parameter for hydrogen dosing.<\/a> Just as in oxygen therapy, doctors use FiO\u2082, or the oxygen fraction. Interestingly, the authors point out that it is the fraction\u2014not the breathing pattern itself\u2014that determines the concentration of hydrogen in the tissues: rats and humans inhaling 2% hydrogen achieve similar concentrations, even though they breathe completely differently.<\/p>\n<\/div><\/div>\n<\/div><\/div>\n\n\n\n

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More doesn't mean better. <\/h3>\n\n\n\n

Research does not suggest that \u201ethe more, the better.\u201d Rather, a practical reference point is around 2% FiH\u2082 (and, more broadly, a range of approximately 1\u20134%), rather than the maximum possible values. There is also a second reason why chasing higher numbers doesn\u2019t make sense: above about 4%, hydrogen in the air becomes flammable. Forcing the flow rate higher, therefore, does not automatically provide benefits and may unnecessarily increase technical risks.<\/p>\n\n\n\n

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It's the dose that makes the poison.<\/p>\nParacelsus<\/cite><\/blockquote>\n\n\n\n

It\u2019s worth recalling here Paracelsus\u2019s old, common-sense principle: \u201eThe dose makes the poison.\u201d Molecular hydrogen itself is a non-toxic gas that is well tolerated, and the body simply exhales any excess. But just because it\u2019s biologically safe doesn\u2019t mean that every flow rate is equally good for everyone.<\/p>\n\n\n\n

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Why are we writing about this?<\/h3>\n\n\n\n

At ANEV, we design hydrogen inhalation systems centered on the correct dose and controlled flow. Our device generates a mixture of 67% H\u2082 and 33% O\u2082, and the flow rate has been selected in accordance with the recommendations of international experts to support effective and safe hydrogen supplementation without unnecessarily increasing the risks associated with the gas\u2019s flammability.<\/p>\n\n\n\n

Molecular hydrogen is being studied, among other things, in the context of oxidative stress and inflammation, and we view it as a means of support and daily prevention, rather than a \u201emiracle cure\u201d or a way to cure diseases. This is still a young and evolving field, which is why we rely on scientific data and responsible communication.<\/p>\n\n\n\n

If you're considering a hydrogen inhaler for yourself, we'd be happy to explain how to interpret the flow rate, what FiH\u2082 is, and how to use hydrogen supplementation safely and in a way that's tailored to your individual needs.<\/strong><\/p>\n\n\n\n

Sources:
\u2022 LeBaron TW, Ohno K, Salomez-Ihl C et al. Respiratory-physiology modeling of therapeutic hydrogen inhalation: defining the fraction of inspired hydrogen (FiH\u2082) and flow-rate requirements. Respir Res. 2026. doi:10.1186\/s12931-026-03664-9.
\u2022 Ohsawa I et al. Hydrogen acts as a therapeutic antioxidant\u2026 Nature Medicine. 2007;13(6):688\u2013694.
\u2022 Johnsen HM, Hiorth M, Klaveness J. Molecular Hydrogen Therapy \u2014 A Review of Clinical Studies and Outcomes. Molecules. 2023;28(23):7785.<\/p>\n\n\n\n

Joanna Macio\u0142,
hydrogen and regeneration expert
+48 733 493 710<\/p>\n<\/div><\/div>\n\n\n\n

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\"Hydrogen<\/figure>\n\n\n\n
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Check out our generator<\/em><\/p>\n\n\n\n

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Learn more<\/a><\/div>\n<\/div>\n<\/div>\n<\/div><\/div>","protected":false},"excerpt":{"rendered":"

Ile wodoru naprawd\u0119 wdychasz? Dlaczego liczy si\u0119 frakcja, a nie \u201eilo\u015b\u0107 mililitr\u00f3w na minut\u0119” Mo\u017ce us\u0142ysza\u0142e\u015b o inhalacji wodorem u swojego…<\/p>","protected":false},"author":8,"featured_media":3090,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[1],"tags":[],"class_list":["post-3086","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-anev"],"acf":[],"meta_title":"","meta_description":"","meta_keyword":"","_links":{"self":[{"href":"https:\/\/anev.com.pl\/en\/wp-json\/wp\/v2\/posts\/3086","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/anev.com.pl\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/anev.com.pl\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/anev.com.pl\/en\/wp-json\/wp\/v2\/users\/8"}],"replies":[{"embeddable":true,"href":"https:\/\/anev.com.pl\/en\/wp-json\/wp\/v2\/comments?post=3086"}],"version-history":[{"count":4,"href":"https:\/\/anev.com.pl\/en\/wp-json\/wp\/v2\/posts\/3086\/revisions"}],"predecessor-version":[{"id":3785,"href":"https:\/\/anev.com.pl\/en\/wp-json\/wp\/v2\/posts\/3086\/revisions\/3785"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/anev.com.pl\/en\/wp-json\/wp\/v2\/media\/3090"}],"wp:attachment":[{"href":"https:\/\/anev.com.pl\/en\/wp-json\/wp\/v2\/media?parent=3086"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/anev.com.pl\/en\/wp-json\/wp\/v2\/categories?post=3086"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/anev.com.pl\/en\/wp-json\/wp\/v2\/tags?post=3086"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}