Your gut makes it, deep-sea divers have breathed it, and it slips out of water fast. Five surprising, sourced facts about molecular hydrogen.

44 healthy adults ate hydrogen jelly or placebo jelly for 8 weeks. Sleep didn’t differ between groups. What that means, plus a new idea to test.

20 healthy young women breathed hydrogen or room air for an hour at rest. What their breath gases showed, what didn’t change, and the study’s limits.

13 athletes drank hydrogen water or plain water before 7 short all-out sprints. What changed, what didn’t, and why the limits matter. Plain English.

Inhalation delivers far more hydrogen than water or tablets. How breathing, drinking, tablets and bagging compare, and what the research covers.

What is molecular hydrogen (H2)? A plain-English look at what it is, why researchers study it, how people take it in, and what we don’t know yet.