Yamamoto Nutrition presents Vitamin D. The 25mcg of Vitamin D is suitable for reduced dietary intake or increased requirements of vitamin D.Vitamin D contributes to the maintenance of normal bones and teeth and normal muscle function.Because our body produces vitamin D as a result of sunlight on the skin, many specialists consider it more a hormone than a vitamin. Despite this, according to current definitions, it is both a vitamin and a hormone. Vitamin D is known in particular for its ability to stimulate calcium absorption. Vitamin D also exerts many anticancerogenic properties, especially against colon and breast cancers. The incidence of colon and breast cancer is higher in areas where exposure to sunlight is lower.