The present invention provides a composition or kit that dissolves in water to produce hydrogen rich water for use in increasing mitochondrial function and energy production. The composition or kit contains magnesium metal, i.e., elemental magnesium, an edible acid and either pyrroloquinoline quinone (PQQ) in any of its forms, a NAD+ precursor such as nicotinamide mononucleotide or nicotinamide riboside or a combination thereof. In water, the magnesium metal and edible acid react to produce magnesium ions and H2, which dissolves in the water.
