Blend of unmethylated B12 forms to promote nerve and mitochondrial health. Hydroxycobalamin is a precursor form of vitamin B12 converted in the body to both methylcobalamin and adenosylcobalamin. It is similar to cyanocobalamin without the cyanide moiety. Adenosylcobalamin is an activated form similar to methylcobalamin. While methylcobalamin is found in the cytosol of cells and predominates in blood and other fluids, adenosylcobalamin is the major form of vitamin B12 stored in the mitochondria of cellular tissues. It is a key cofactor in carbohydrate metabolism for the enzyme methylmalonyl-CoA mutase used to produce succinyl-CoA. Optimal levels also support healthy synthesis of neuronal myelin. A unique blend of adenosylcobalamin and hydroxycobalamin offers unmethylated B12 to promote nerve and mitochondrial health. Nerve and mitochondria support Made with hypoallergenic, vegan ingredientsDietary ConsiderationsGluten Free Non-GMOServing Size:1 Vegetable CapsuleServings Per Container:90Amount Per Serving % Daily ValueVitamin B12 (as adenosylcobalamin and 50% hydroxycobalamin) 2000 mcg 83333%Other Ingredientshypoallergenic plant fiber (cellulose), vegetarian capsule (cellulose, water)Suggested UseAs a dietary supplement, take 1 capsule, 1-3 times daily, with meals.WarningIf you are pregnant or lactating, have any health condition or are taking any medication, consult your health professional before use. Keep out of the reach of children. Use only if safety seal is intact. Store in a cool, dry place.