What are the RDA requirements for vitamin D?
Vitamin D experts recommend a minimum amount of 1000 IU/day. RDA requirements are 200 IU for children, 400 IU for adults and 600 to 800 IU in older people and those with osteoporosis. Vitamin D is fat soluble and is stored in the blood and fat tissue. It is absorbed better when taken with vitamin E. In summer months, 15 minutes of sun exposure two to three times a week is usually adequate.
