Dietary Supplements

According to Dietary Supplement Health and Education Act, a dietary supplement is a product that:

• Is intended to supplement the diet
• Contains one or more dietary ingredients (including vitamins, minerals, herbs or other botanicals, amino acids, and certain other substances) or their constituents
• Is intended to be taken by mouth, in forms such as tablet, capsule, powder, softgel, gelcap, or liquid
• Is labeled as being a dietary supplement.

Herbal supplements are one type of dietary supplement. An herb is a plant or plant part (such as leaves, flowers, or seeds) that is used for its flavor, scent, and/or therapeutic properties.  An herbal supplement may contain a single herb or mixtures of herbs.

"Botanical" is often used as a synonym for "herb."

Research has shown that some uses of dietary supplements are effective in preventing or treating diseases. For example, scientists have found that folic acid (a vitamin) prevents certain birth defects, and a regimen of vitamins and zinc can slow the progression of the age- related eye disease macular degeneration. Also, calcium and vitamin D supplements can be helpful in preventing and treating bone loss and osteoporosis (thinning of bone tissue).

Research has also produced some promising results suggesting that other dietary supplements may be helpful for other health conditions, for example omega-3 fatty acids can help people with coronary disease. But, in most cases, additional research is needed before firm conclusions can be drawn.