Science doesn't actually know all the details yet. However, the consequences of using it in basic studies are largely known. And a billion-dollar industry in the Far East has already ensured that people don't wait until decades of human studies prove 100% effectiveness. You're already relying on what's likely to come out of it.
From today's perspective, it's perhaps fair to say that hydrogen (H2) is the most interesting of all medical gases for various reasons as a therapeutic gas. Essentially, it reduces oxidative stress and inflammation, thus addressing the root cause of over 150 of the most common diseases. However, it currently offers no protection against bacterial and viral infections. Oxidative stress and inflammation are undoubtedly two of the most fundamental mechanisms for the deterioration of human health, especially with advancing age and its associated age-related diseases. Molecular hydrogen has been shown to be effective in virtually every organ of the human body because it helps to mitigate oxidative stress and inflammation.
Less hydroxyl radicals, which are the most dangerous in our body, what does that mean? If you look at the other free radicals, such as nitric oxide (NO), this is a very beneficial important free radical because it can dilate blood vessels and therefore helps reduce blood pressure.
No one wants to neutralize NO with an antioxidant! Our immune system also uses other oxidants like hydrogen peroxide, which shouldn't be eliminated unless they become excessive. But our body's own antioxidants already reliably keep them in check.
The peroxynitrite anion, which is very damaging to cells, also obviously decreases through treatment with hydrogen gas. Do we have to wait until every last doctor knows why this is the case? The doctor treating you has, on average, studied medicine 20 years ago and may have never learned about the mechanisms of NO or peroxynitrite during their training or further education.
Normal antioxidants are not selective. They donate their electrons even to relatively weak oxidants. Molecular hydrogen, on the other hand, reacts selectively only with super-strong oxidants that cannot be neutralized by other endogenous antioxidants.
Hydrogen helps bring everything back to homeostasis.
This is why hydrogen is so difficult to study: when you administer molecular hydrogen to a cell or animal, often no changes are visible. If everything is already perfect, if everything is already in homeostasis, you won't see any changes. For hydrogen to have an effect, you often have to administer some kind of toxin, and then you see how hydrogen reduces, mitigates, or attenuates the effects of this toxin-induced problem.
