NTDT200 Lecture Notes - Lecture 13: Parathyroid Gland, Hard Water, Tap Water
15 Nov 2018
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Categorized by the amount required in the diet. Major minerals (>100 mg/day): sodium, potassium, chloride, calcium, magnesium, phosphorus, sulfur. Trace minerals (<100 mg/day): iron, zinc, copper, iodine, selenium, molybdenum, fluoride, manganese, chromium. Composes about 4% of our body weight. Minerals are ions (elements with positive or negative charge) Allows minerals to be in chemical reactions and bond with molecules. Part of hormones and enzymes, transmit nerve impulses, maintain fluid balance, support immune system, act with enzymes as cofactors to facilitate chemical reactions, work in partnership with other minerals. The absorption and bioavailability of minerals are influenced by several factors. Presence of binders in foods: phytates, oxalates, polyphenols. Tap water can be a source of some essential nutrients. Minerals are found across all food groups. Magnesium contributes to strength/firmness of bones, makes teeth harder, essential for absorption and metabolism of calcium. Calcium is the most abundant mineral in the body. Blood clotting, hormone secretion, muscle contraction, nerve transmission.
