Over half of all Americans over the age of 20 years used dietary supplements in 2003-2006, with multivitamins being the most common. More people are purchasing other supplements, such as calcium and vitamin D, a new report issued by the NCHS (National Center For Health Statistics), part of the CDC (Centers for Disease Control and Prevention) informs. However, supplemental folic acid usage among females between 20 and 29 years of age hardly went up at all.

Dietary supplements, also known as nutritional supplements or food supplements are preparations aimed at supplementing the diet by providing essential nutrients, such as minerals, amino acids, fatty acids, vitamins, and fiber that a person's diet may be lacking. In some countries dietary supplements are defined as foods, while in others they are classed as health products or drugs.

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