Medical Definition of Zinc

Zinc: A mineral that is essential to the body and is a constituent of many enzymes that permit chemical reactions to proceed at normal rates. Zinc is involved in the manufacture of protein (protein synthesis) and in cell division. Zinc is also a constituent of insulin, and it is involved with the sense of smell. Food sources of zinc include meat, particularly liver and seafood; eggs; nuts; and cereal grains.

QUESTION

According to the USDA, there is no difference between a “portion” and a “serving.” See Answer

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Reviewed on 12/27/2018