DIETARY SUPPLEMENT Indrotuction Definition Types Vitamins Minerals Proteins and amino acids Bodybuilding supplements Natural products Probiotics Fertility Prenatal Pharmacotherapy Industry Adulteration, contamination and mislabeling Regulatory compliance Adverse effects Society and culture A dietary supplement is a manufactured product intended to supplement a person's diet by taking a pill , capsule , tablet , powder, or liquid. [ 2 ] A supplement can provide nutrients either extracted from food sources, or that are synthetic (in order to increase the quantity of their consumption). The classes of nutrient compounds in supplements inc...