HSS 2342 Chapter Notes - Chapter 10: Tryptophan, Ileum, Pyridoxine
28 Feb 2017
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Document Summary
Vitamins: organic, essential nutrients needed in small amounts by body for health. Structure: vitamins are organic, share structure similar with macronutrients, one unit (never in chains like glucose) coenzymes. Function: both do not yield energy, but can assist enzymes to release energy. Vitamins can be broken down; minerals cannot & are eliminated in feces, sweat, or urine. Food content measurement: vitamins are based on microgram to milligrams & minerals are micrograms to grams. Use of aztecs to find the unavailable niacin in the corn. *niacin deficiency leading cause of 87k deaths from pellagra in us. Chemical/organic nature: vitamins can be destroyed & minerals cannot be destroyed. Water soluble leading to easily gained/lost within blood or into urine/sweat. Fat soluble more storage than loss, can lead into toxicity. Toxicity: too much of good things can still lead to toxicity dri addresses ul for limiting over-eating.
