NUTR 1010 Lecture Notes - Lecture 19: Vitamin A Deficiency, Adipose Tissue, Xerophthalmia
11 Jan 2017
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Document Summary
Is a threat to health, sight, and lives of millions of children around the world. Caused by insufficient intake of vitamin a, fat, protein, or zinc. Can result in: night blindness, xerophthal(cid:373)ia: greek word for (cid:858)dry eyes(cid:859, blindness, poor growth. Liver and other organ damage: can cause death. Preformed vitamin a can be toxic if taken in high amounts. Medications made from vitamin a can cause serious side effects. A fat-soluble vitamin: absorbed better when eaten with fat, absorbed in small intestine, transported in the blood via lipoproteins, our bodies store vitamin e in fat cells (adipose tissue) Alpha-tocopherol: the form of vitamin e absorbed by the human body. Works in lipid environments: unsaturated fatty acids, stored triglycerides and other fatty tissues, lipoproteins. The stealing of electrons (by free radicals) Some fa are oxidized more easily that others. The more unsaturated, the easier the oxidation reaction (pufa are very prone)
