‘’ZINC ‘’ The Friendly and Forgotten Micronutrient

Abstract

Zinc is the second most abundant trace mineral after iron, and is important in the protein metabolism and synthesis, in DNA metabolism, and in stabilization of cell membrane [1]. It is essential for functions of various cellular metabolisms, and it acts as a cofactor for more than two hundred enzymes [1]. Also, zinc has its crucial role during periods of growth and tissue proliferation (immune system, wound healing, skin, and GIT integrity). Furthermore, zinc has its own vital physiologic role in immune function, sexual maturation and normal growth [1]. Animal products including human milk are considered the best dietary source of zinc. In addition, whole grains and legumes contain moderate amount of zinc. Globally, poor bioavailability of zinc secondary to phytic acid, which inhibits zinc absorption from its sources, is considered more important factor than low intake in many cases of zinc deficiency [1].