Foods and Nutrition 1021 Chapter Notes - Chapter 7: Vitamin D Deficiency, Vitamin A Deficiency, Vitamin B6

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Vitamins: organic compounds vital for life. Indispensable to body functions: needed in small amounts, non-caloric essential nutrients, the only disease a vitamin can cure is the one caused by a deficiency of that vitamin. Precursors/provitamins: compounds in foods converted to active vitamins. Fat-soluble vitamins: vitamins a, d, e, k. Water-soluble vitamins: b vitamins (thiamin (b1), riboflavin (b2), niacin (b3), folate, b12, b6, biotin, pantothenic acid, vitamin c. Factors that destroy vitamins: acids, bases, oxygen, uv light, heat. 3 active forms in the body: retinol (stored in the liver, retinal & retinoic acid (converted by cells for retinol) Good food sources: liver, fortified milk (vitamin a, deep orange fruits/veggies & dark green leafy vegetables (sweet potatoes, carrots, squash, spinach, bok choy, broccoli, apricots, mango, cantaloupe) (bara-carotene) Most abundant carotenoid precursor for vitamin a. B-carotene in excess: not toxic compared to retinol, turns people bright yellow/orange if eaten in excess (due to build up in fat tissue beneath the skin)

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