Definition of dietary supplement
: a product taken orally that contains one or more ingredients (as vitamins or amino acids) that are intended to supplement one's diet and are not considered food
First Known Use of dietary supplement
Medical Definition of dietary supplement
: a product taken orally that contains one or more ingredients that are intended to supplement one's diet and are not considered food; specifically according to the Dietary Supplements Health and Education Act : a product other than tobacco that is taken by mouth, that contains one or more vitamins, minerals, herbs or other botanicals, amino acids, substances supplementing the diet by increasing the daily dietary intake, or a concentrate, constituent, metabolite, extract, or combination of these, that is not represented as a food or as constituting a meal or the sole item of the diet, and that contains as part of its labeling the words dietary supplement
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