MEDI110 Lecture Notes - Lecture 19: Dietary Fiber, Phytic Acid, Molybdenum
6 Aug 2018
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Document Summary
Recall trace and major minerals and their role in the body. Inorganic elements: various functions in the body e. g. water balance, growth and development, nervous system, cellular process, cofactors, needed in small amounts, not destroyed by cooking, yield no energy, major minerals require, >100mg/day, trace minerals require, <100mg/day. Functions of minerals: metabolic roles, cofactors for enzymes, body growth and development. Bioavailability of minerals: absorption is inhibited by binders and dietary fibre (e. g. phytates and oxalates, animal products are better absorbed, minerals compete for absorption e. g. iron and calcium. Food sources of minerals: plants, animals, fortification/enrichment. Toxicity of minerals: the body"s ha(cid:374)dli(cid:374)g of mi(cid:374)erals, some behave like water-soluble vitamins, some behave like fat soluble vitamins, excessive intakes can be toxic, especially with trace minerals, therefore care must be taken for supplementation. Function: positive ion in extracellular fluid, maintains normal fluid and electrolyte balance, participates in nutrient absorption, assists in nerve impulse transmission and muscle contraction.
