UMass Amherst NUTRITN 130 - Free Radicals and Antioxidants (3 pages)

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Free Radicals and Antioxidants



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Free Radicals and Antioxidants

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We go into depth talking about different antioxidants and nutrients that help stabilize free radicals and how antioxidant supplements increase risk.


Lecture number:
22
Pages:
3
Type:
Lecture Note
School:
University of Massachusetts Amherst
Course:
Nutritn 130 - Nutrition for a Healthy Lifestyle
Edition:
1

Unformatted text preview:

Nutrition 130 1st Edition Lecture 22 Learning Objectives Know what causes the formation of free radicals Know diseases associated with free radical damage Describe how antioxidants help in cancer and CHD prevention Identify the modifiable risk factors of cancer Know dietary recommendations to reduce cancer risk Identify which nutrients function as antioxidants and identify their functions outside of antioxidant function food sources and diseases of deficiency Know the increased needs of smokers for antioxidants Know benefit risk of antioxidant supplements Vitamin C Functions Water soluble vitamin Antioxidant o Stabilizes free radicals DRI healthy adults o Males 90 mg day smokers 125 mg o Females 75 mg day 110 mg Water soluble vitamin DRI is higher in smokers Sources fruits and vegetables varies Functions o Antioxidant in extracellular fluid and lungs o synthesis in collagen These notes represent a detailed interpretation of the professor s lecture GradeBuddy is best used as a supplement to your own notes not as a substitute o enhances immune system and iron absorption non heme A fat soluble vitamin It is destroyed by heat It is found in oils and nuts It is an antioxidant Vitamin E Beta Carotene Precursor to Vitamin A o Part of a group called carotenoids o More available when cooked Functions o Antioxidant Stabilizes free radicals o No DRI Found in pumpkins sweet potatoes spinach collards kale turnip greens carrots Toxicity and deficiency o No known toxicity o Skin may turn yellow Antioxidant supplements may increase cancer risk Vitamin A Fat soluble Stored in liver adipose tissue kidneys lungs May be antioxidant Functions o Vision o Immunity o Cell differentiation o Sperm production Found in fortified milk beef liver brightly colored veggies Toxicity o Toxic especially from supplements Deficiencies o Night blindness Dietary Guidelines o Eat more fruits and veggies o Make your plate fruits and veggies Additional o Zinc iron copper and manganese



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