Table 1. Dietary supplement categories as defined in Dietary Supplement and Caffeine Intake Survey of U.S. Coast Guard Active Duty Personnel.

Category	Definition
Dietary Supplement	Any DS1 as defined by the DSHEA2 legislation
Multivitamin	DS containing two or more vitamins and no additional supplement ingredients
Multimineral	DS containing two or more minerals and no additional supplement ingredients
Protein and Amino Acid	Amino acid mixtures, protein powders, and similar products where the intention is to provide a single or complex protein source
Individual Vitamins or Minerals	DS that were single nutrient ingredient supplements, such as calcium or vitamin D
Combination Products	DS with mixtures of ingredients from any of the above categories; included two or more categories and multiple ingredients
Herbal Supplements	DS that included one or more herbal ingredients with no nutrients or other supplement ingredients; also includes plant-derived ingredients
Purported Steroid Analogs	Steroidal hormones or herbal substitutes for hormones that were marketed as DS and included the Supplement Facts panel on the label