NUTR100 Lecture Notes - Lecture 12: Manganese, Dietary Supplement, Beta-Carotene

• School: University of Alberta
• Department: Nutrition
• Course: NUTR100
• Professor: Sabina Valentine

Document Summary

Studies eat more antioxidant nutrients, have lower risk of developing cancer and heart disease. High intake of vegetables and fruits (rich in antioxidants) have low rates of cancer and heart disease. Most widely publicized research trial: 5-year study in china. 30 000 residents of north china given either dietary supplement containing 1 of 7 vitamin-mineral combinations (2x the amount of dri) or a placebo. Those who received daily dose of beta-carotene, vitamin e and selenium had a cancer rate 13% lower than the population. However no subsequent trials in other countries had the same findings. No current research indicating that antioxidant supplements are more beneficial than simply eating healthy. Few studies suggest that consumption of antioxidants at pharmacological doses can increase free radical production (oxidation) One firm conclusion: it is beneficial to regularly consume antioxidant rich foods like fruits and vegetables.