NUTR 1010 Lecture Notes - Lecture 25: Hydroxylapatite, Scleroprotein, Iodine
16 Mar 2016
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Document Summary
Inorganic elements that your body needs in order to function. Major minerals: you need more than 100mg/day (calcium, phosphorus, magnesium) Trace elements: you need less than 100mg/day (iron, zinc, copper, selenium, iodine) Structural roles: calcium, magnesium, phosphorus, and fluoride are needed for bone structure. Regulatory roles: iodine used to make thyroid hormones (metabolic rate) Many minerals are needed as cofactors for enzymes. 35% organic substances (for strength and flexibility) collagen (a fibrous protein) Major roles: calcium, vitamin d and phosphorus. Minor roles: magnesium, vitamin k, vitamin a, protein, fluoride. A major mineral (we need >100mg a day) Milk alternatives and fortified foods (i. e. calcium fortified orange juice) Only about 25% of calcium in foods in absorbed. Less if you have a diet low in vitamin d. Your intestines can only absorb about 1 cup of milk"s worth of calcium t one time. Oxylates (spinach), phytates (whole grains), and tannins (tea) decrease absorption.
