Vitamin B12 plays an important role in the synthesis of DNA and is therefore necessary for the healthy growth of every cell in the body, particularly the bone marrow and red blood cells. It also plays an important role in fatty acid metabolism and in maintaining a healthy heart, immune and nervous system.Vegetarians and vegans may have an increased need for this vitamin, as it does not appear to be bio-available from vegetable sources and is primarily found in meat, eggs and dairy products.Heavy drinkers, smokers, individuals with a poor appetite or diet, menstruating and pregnant women, adolescents, the elderly, and those with a mentally or physically demanding lifestyle may have an increased dietary requirement for vitamin B12. Available in pack sizes of: 30's and 120's. Suitable for: Kosher, vegan and vegetarian diets.