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Zinc

It is essential for cell development, protein synthesis and the utilisation of vitamin A.

Its RDA ranges from 10 to 15 mg/day in both children and adults.

It may cause gastric disturbances. At high doses and for chronic treatment, it can increase cholesterolaemia. It has an interesting action in stimulating non-specific immune processes, acting primarily on cellulomediated immunity.

The most important natural sources are: seafood, whole grains, eggs.

The main plant drug containing this metal is the cranberry.