Dietary supplements are products designed to supplement the diet by consuming pills, capsules, tablets, powders, or liquids. Nutritional supplements can provide minerals and vitamins from either food sources or synthetics to increase their consumption. The class of nutrient compounds includes vitamins, minerals, fiber, fatty acids, and amino acids. Dietary supplements may also contain substances that have not been identified as vital but are associated with beneficial biological effects. It includes plant polyphenols and pigments. Animals can also be a source of dietary supplements such as chicken and fish collagen. These are sold individually or in combination. These are enriched with nutrients
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