This helps the body absorb calcium, which is crucial for the development of strong and healthy bones. Without sufficient vitamin D, bones can become thin, brittle, or misshapen. Vitamin D deficiency is common. Levels in the body can be measured with a blood test that can be ordered by your healthcare professional.
Vitamin D is found naturally in only a few foods, including fatty fish (salmon), liver (or cod liver oil), and egg yolks. In the U.S., milk and some cereals, juices, and breads are fortified with vitamin D. It can also be attained through nutritional supplementation and time spent in the sun.