NUSCTX 10 Lecture Notes - Lecture 8: Dietary Supplement, B Vitamins, Blood Vessel
16 Dec 2015
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Document Summary
Vitamin are organic compounds can be stored in our bodies, overload can make it toxic: contains carbon. Water soluble vitamins: b vitamins and vitamin c. B vitamins were originally one chemical substance but are actually many substances hence the subscripts 1,2,12 . Review: vit a- sight ex: carrots, vit k-blood clotting ex, vit d-sunshine/calcium; salmon, vit e-antioxidant/scavenge free radicals/bind to membranes/protect fatty acids, fortified and enriched foods. Not enough macronutrient, don"t substitute: combo of vit, min, herbs, enzymes, etc, cannot replace benefits of variety of foods. Absorption of vitamins: not much diff to macronutrient digestion, small intestine. Water soluble: transfer molecules at the surface and entry into blood vessel tissue utilization. Fat soluble: need a fatty meal with it, chylomicron (lipoprotein)allows for movement goes into lymph blood vessel tissue. Bioavailability of vitamins: must be absorbed in body, some absorbed in inactive provitamin or vitamin precursor forms that.
