Jamieson A + D3 is formulated with 10,000 IU of vitamin A and 800 IU of vitamin D3 for the development and maintenance of healthy skin, bones and teeth, as well as support of eye health. Vitamin A is an essential nutrient that is required for various bodily functions, including maintaining healthy skin, promoting good vision, and supporting the immune system. Jamieson Vitamin A 10,000 IU provides a concentrated dose of this vital nutrient to support eyesight, immune function, and skin health. Vitamin D helps your body absorb calcium and phosphorus, contributing to the maintenance of bone health. As well, Vitamin D helps to support your immune system.