What are the best sources of vitamin D?
Most foods contain only small amounts of vitamin D. The richest sources of naturally occurring vitamin D are high-fat foods such as oily fish, egg yolk, and liver. However, more common foods such as milk, fruit juices, breads, and cereals may be fortified with vitamin D. The most popular dietary source of vitamin D is fortified milk. Yet, most of our vitamin D comes from exposure to sunlight. Ultraviolet rays trigger the conversion of a compound in the skin to a vitamin D-like substance that is transformed in the liver and then in the kidney to an active form of the vitamin.
