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"Food supplement" redirects here. For food additions that alter the flavor, color or longevity of food, see food additive.

A dietary supplement. also known as food supplement or nutritional supplement. is a preparation intended to provide nutrients. such as vitamins. minerals. fiber. fatty acids or amino acids. that are missing or are not consumed in sufficient quantity in a person's diet. Some countries define dietary supplements as foods, while in others they are defined as drugs.