Instead, they almost instantly bond with other atoms or with another hydrogen atom to form a stable H₂ molecule. In the natural world, hydrogen is typically found in the form of hydrogen gas (H₂) or compounds like water (H₂O), methane (CH₄), and other organic molecules.
When it does react, it releases a significant amount of energy, often causing highly exothermic reactions.
As a result, atomic hydrogen is not suitable for direct use in biological systems, due to its instability and extreme reactivity.
However, when two hydrogen atoms bond together, they form molecular hydrogen (H₂)—a stable, non-reactive gas that is safe and effective for biological use.
Molecular hydrogen (H₂) has a high level of bioavailability and safety, and is now being actively studied and applied in medical fields, antioxidant therapy, anti-inflammatory treatments, and more.