Methyl B-12 (methylcobalamin) supports brain and nerve health and function, energy production, and sleep-wake cycles.* Methyl B-12 is better absorbed and retained than cyanocobalamin, and supplementation may be needed by seniors, persons on stomach acid reducing regimens, and some vegetarians/vegans.*. . The Most Bioavailable Form of Vitamin B-12ThatHelps Maintain Brain-Health, Vitality, and Levels of Restful Sleep*