Dietary supplements are vitamins, minerals, herbs etc. They can come in the form of pills, capsules, powders, drinks, and energy bars. Supplements do not have to go through the testing that drugs do. A dietary supplement provide nutrients that may otherwise not be consumed in sufficient quantities.
Some supplements can play an important role in health. For example, calcium and vitamin D are important for keeping bones strong. Pregnant women can take the vitamin folic acid to prevent certain birth defects in their babies.
Related Journal on Dietary Supplement
Journal of Dietary Supplements-Taylor & Francis Online, Journal of Nutrition & Food Sciences, Journal of Dietary Supplements, Journal of Nutritional Disorders & Therapy, Journal of Clinical Nutrition & Dietetics.