FND 100 Study Guide - Final Guide: Phytic Acid, Magnetic Core, Manganese

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Trace minerals include zinc, iron, copper, manganese, selenium, iodine, flouride, chromium and molybdenum. Provide a variety of essential structural and regulatory roles. Phytate, tannin, oxalate and fibre can bind minerals, reducing their absorption. Selenium, copper, zinc, iron and manganese are cofactors for antioxidant enzyme systems. Iron is major constituent of blood, needed to carry oxygen to body cells. Essential for delivery of oxygen to cells, enhances amount of oxygen available for muscle contraction, essential for atp production, drug metabolism and immune function. Comes from both plant (nonheme iron) and animal sources (heme iron) Iron leaches into food from iron cooking utensils, enhanced by acidic foods. Iron from diet is absorbed into intestinal mucosal cells, amount absorbed depends on heme or nonheme. Heme iron absorbed more efficiently than nonheme iron - little iron is lost from body, most iron loss is due to blood loss. Heme iron absorption not affected by dietary factors that impact nonheme iron absorption.

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