Understanding Dietary Supplements According to federal regulations, dietary supplements are products that meet the following criteria: • They are taken orally in forms such as pills, capsules, powders, or liquids. • Their purpose is to complement your regular diet. • They contain one or more dietary components, including substances like vitamins, minerals, herbs, botanicals, amino acids, enzymes, organ or gland extracts, or any combinations of these elements. • The product is clearly marked as