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Hydrogen inhalation therapy
Dr Sun Lee has created a technically good work that describes HHO inhalation therapy well and shows many practical examples

Hydrogen Medicine
Dr. Mark Sircus was the first to write about H2, very flowery and with more information than one needs. My own book will be published mid-year. Here is my German translation.

Brown's Gas and H2 - The Insight
Brown's gas is NOT always 66% H2 and 33% O2. Furthermore, Brown's gas is different from H2. Read more here. More information to follow.
Operating instructions for H2 med
Operating instructions for Bioenergizer (Browns Gas)