Scientists have found that people who live in cool climates -whether omnivore, vegetarian or vegan- are more prone to vitamin D deficiency due to insufficient sun exposure. All this is in spite of the fact that some fish contain vitamin D and, most milk, cheese and ice cream are fortified with Vitamin D for those who follow an omnivore or a vegetarian diet. For vegans rules are the same. People who do not get adequate sun exposure or Vitamin D fortified/rich foods are at the risk of developing Vitamin D deficiency unless they supplement. People with limited sun exposure may also consider supplementation, especially if they are home bound and live in Northern Latitudes. People with dark skin may not get enough Vitamin D in their system if their sun exposure is limited. Those with fat malabsorption may need to be supplemented with vitamin D and other fat soluble vitamins. Ingredients: Vitamin D2 (Ergocalciferol). Capsule - Cellulose, Vegetable Stearic Acid, Croscarmellose Sodium, Vegetable Magnesium Stearate, Dicalcium Phosphate, Silica.