HSS 2342 Lecture Notes - Lecture 30: Pellagra, Vitamin B6, Nixtamalization

• School: University of Ottawa
• Department: Health Sciences
• Course: HSS 2342
• Professor: Keir J Menzies

Document Summary

Lecture 11 chapter 10 nutrients for energy metabolism. The vitamins and minerals an overview of micronutrients. Structure: vitamins are organic, share structure similarities with macronutrients, one unit (never in chains like glucose) coenzymes, minerals are inorganic, one unit - cofactors. Function: both do not yield energy, but can assist enzymes to release energy, vitamins can be broken down; minerals cannot and are eliminated in feces, sweat, or urine. Food contents: vita(cid:373)i(cid:374)s: (cid:373)i(cid:272)rogra(cid:373)s (cid:894) g(cid:895) to (cid:373)illigra(cid:373)s (mg, mi(cid:374)erals: (cid:373)i(cid:272)rogra(cid:373)s (cid:894) g(cid:895) to gra(cid:373)s (cid:894)g(cid:895) Toxicity: dietary reference intakes (dri) addresses this problem by establishing the tolerable upper. Interactions: vit c enhances absorption of iron example of enhancement (but others can prevent absorption) B vitamins become deficient quickly and are less likely to be toxic. The b vitamins tend to work together and the presence or absence of one affe(cid:272)ts a(cid:374)other"s absorption, metabolism, and excretion. For example, riboflavin assists the enzyme that coverts vitamin b6 to its coenzyme form.