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Molecular hydrogen

The science, the people leading it, how to learn it yourself, and my favorite way to make hydrogen-rich water at home.

New · Free course

Hydrogen 101 ✨

14 short videos in 3 levels, from "what is molecular hydrogen?" to real study results in people. Built from Dr. Tyler LeBaron's IGNITE talk. Free, no sign-in needed.

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New video · Watch this first

Nature’s Miracle

Molecular hydrogen, explained by John Campbell. Press play to watch it right here.

Presented by John Campbell, Level 2 Certified Molecular Hydrogen Consultant. No sign-in needed: just press play.

Our recommendation, always: feel confident about your water quality before ionizing it. A water ionizer works with whatever water you feed it, and it isn't a certified contaminant filter. Check your water first, and use a certified drinking-water filter before any ionizer if your water needs it.

What is molecular hydrogen?

Molecular hydrogen is hydrogen gas (H2), two hydrogen atoms bonded together. It's the smallest molecule there is. It can dissolve in water, and water that carries dissolved hydrogen gas is often called hydrogen-rich water.

It's different from the hydrogen that's already part of every water molecule (H2O). That hydrogen is locked to oxygen. Molecular hydrogen is a separate gas dissolved in the water, and it slowly escapes into the air, so hydrogen-rich water is best made fresh.

Read the research yourself

Scientists around the world are studying molecular hydrogen, and the research is still developing. H2Known doesn't make health claims about hydrogen water or any product. Go straight to the studies:

Learn from the people leading it

Molecular Hydrogen Institute (MHI)

A science-based nonprofit founded by Tyler W. LeBaron, PhD. It focuses on research, education, and awareness about what molecular hydrogen is, and what it isn't.

Visit MHI
Join Dr. LeBaron's monthly live Q&A

The MHI Community includes a monthly live Q&A with Dr. Tyler LeBaron (submit questions ahead or ask live, with recordings), a resource library, discussion forums, and a monthly learning group for Level 1 certification. It's $7/month or $84/year on MHI's site right now.

Join the MHI Community MHI Podcast
Wellness Science Initiative (WSI)

Organized by MHI, WSI teaches how to evaluate health and wellness claims with scientific literacy and critical thinking: open-minded skepticism, intellectual humility, and weighing the evidence. Join the community of peers, take on science challenges, and compete in events.

Join the WSI community About WSI
Get certified through the institute

H2 Advisor · Level 1 Certification

Six courses plus a final exam from the Molecular Hydrogen Institute: Thinking Like a Scientist, Beginning Chemistry, The Science of Hydrogen, Understanding Hydrogen Water, and Molecular Hydrogen Therapy. Most people finish in 6 to 12 hours.

$168 $560 price on MHI's site right now

Get certified

More levels: all MHI certifications · New to it? Try the H2 Apprentice starter course.

My favorite: the Enagic K8

Enagic Leveluk K8

The Enagic Leveluk K8 is a countertop water ionizer from Enagic, a Japanese company that has made these machines for decades. It connects at your kitchen faucet or after a drinking-water filter, and has several settings for drinking water and household uses.

  1. Water from your filter or faucet flows into the machine.
  2. Inside, electrically charged plates split some of the water molecules (electrolysis).
  3. The drinking-water side comes out with dissolved hydrogen gas and a higher pH. The other side is acidic and is used for cleaning.
About ppm (how much hydrogen is in the water)

Dissolved hydrogen is measured in parts per million (ppm), the same as milligrams per liter. How much ends up in your glass depends on your source water, the setting, the flow rate, and time: hydrogen escapes from water, so it's highest right when it's made. Drink it fresh.

Want your own number? Hydrogen test drops (reagent tests) let you measure the ppm in your glass at home.

Order your K8

  • When Enagic's page opens: in the United States, click Proceed. Outside the US, choose your country and follow the steps.
  • Orders typically arrive in about 3 to 4 days in the US.
  • Financing is available. You'll see the options on Enagic's page.
  • We highly recommend feeling confident about your water quality before ionization.
Order the K8

Filter first: see certified filters matched to your water.

🎁 Always growing

We keep adding molecular hydrogen products, courses, videos, and fun activities to join in on. Join H2Known free to hear first.

H2Known and its affiliates may earn a commission from purchases. It never changes our recommendations or your price. Enagic, Kangen, and Leveluk are trademarks of Enagic. H2Known is independent and not operated by Enagic. Education only, not medical advice.