An Evidence-based Approach to the Clinical Use of Dietary Supplements and Nutraceuticals
Jeffery Mechanick
Dietary supplements are defined by the US Dietary Supplement Health and Education Act (DSHEA) as a vitamin or mineral, a herb or other plant-derived chemical, an amino acid, a dietary supplement by increasing the total dietary intake (including enzymes or tissues from organs or glands), or a concentrate, metabolite, constituent, or extract of these.