B-100 caps provide a full complement of b-Vitamins plus choline and inositol. These vitamins work to support energy production, maintain healthy homocysteine metabolism, and promote the health of the nervous system. B-Vitamins are water soluble, and with the exception of b-12, have limited storage in the body and thus require daily replenishment. While b-12 is stored in the liver, dietary sources are of animal origin only (Meat and dairy) and supplementation with b-12 may be especially important for vegetarians.