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Lecture 7

NUTR 1010 Lecture 7: Vitamins

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McMaster University
NUTR 1010
Andrea Buchholz

Wednesday, March 9, 2016 Vitamins What are vitamins? - Organic molecules that we need to eat or our bodies to function - What does organic mean? - We talk about vitamins being either water soluble or fat soluble Water Soluble Vitamins - B vitamins, vitamin C - Some absorption in stomach - Transported into intestinal cells using facilitated diffusion or active transport - Transported in the body bound to blood proteins - Too much? Pee it out Fat Soluble - Vitamins A, D, E, and K - Are best absorbed when eaten with fat - Are absorbed into intestinal cells in chylomicrons with lipids - Transported in the body as lipoproteins or bound to transport proteins - Too much? Often stored in the body, cod be dangerous The B Vitamins - They are coenzyme vitamins - ALL involved with enzyme activity 1 Wednesday, March 9, 2016 - Burning CHO, fat and/or protein - They act as co-enzymes for energy metabolism - B1 (Thiamin) - B2 (Riboflavin) - B9 (Folate or Folic Acid) Where do you find them? - Not just supplements - Grains (B1, B2, B3, B6) - Vegetables and fruit (B2, B6, Folate) - Milk (B2, B12) - Meats (B1, B2, B3, B12, Folate) Flour in Canada - Flour, White Flour, enriched Flour or Enriched White Flour is ENRICHED with: - Thiamin - Riboflavin - Niacin - Iron - Folic Acid Fort
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