Both UVA and UVB rays can damage your skin, just in different ways. One causes premature aging, the other is more prone to causing sunburn, DNA damage, and skin cancer.

Different vitamin A preparations, such as retinol, alpha- and beta-carotene, have different RAE per IU. For example, 3,000 IU of vitamin A (as retinol) is 900 mcg RAE.

Vitamins that are water-soluble differ from fat-soluble vitamins in how they are absorbed into the body, how they're stored, and the potential for toxicity.

Avocados contain many vitamins, minerals, and healthy fats. Learn more about the possible health benefits of avocados.

People are being poisoned by taking far too much of a vitamin supplement - with most of those being young and athletes ...