NTR 108 Lecture Notes - Lecture 8: Phytochemical, Broccoli, Nyctalopia
Document Summary
Antioxidant nutrients: oxidation: just a part of living in an oxygen environment also part of energy metabolism. Immune system (during the process of defense free radical are produced) Change in the structure of a molecule (dna, protein, cellular membrane, ldl) Industrial chemicals: antioxidants: react with free radicals to make them less harmful, nutrients & enzymes (2 ways to defend, nutrients that are destroyed and enzymes that can continue to work against oxidation) Enzymes: need cofactors such as selenium, copper, zinc: ascorbic acid (vit c) Collagen is a key component of skin & many other tissues. Immune functions - protects white blood cells from oxidative damage. Easily destroyed by air and heat (slicing & leaving in open to the air, fruit salad made in the night before will lose most of the vit c by the next day) Large doses (upper level - 2000mg: maybe risk for kidney stones, vit e. Def / classification - lipid soluble: many diff forms.
