How might nutrition prevent and/or treat of cataracts and macular degeneration?
Fill in the blank(s) with the appropriate word(s).
Oxidative stress appears to play a significant role in the development of cataracts, but supplements of the antioxidant nutrients (vitamin C, vitamin E, and carotenoids) do not seem to prevent or slow the progression. By comparison, a healthy diet that includes plenty of fruits and vegetables rich in these antioxidant nutrients does seem to slow the progression or reduce the risk of developing cataracts. A word of caution: vitamin C supplements in high doses (1000 milligrams) and long duration (several years) may increase the risk of cataracts. One other diet-related factor may play a role in the development of cataracts— obesity. Obesity appears to be associated with cataracts, but its role has not been identified. Risk factors that typically accompany obesity, such as inactivity, diabetes, or hypertension, do not explain the association.
The leading cause of visual loss among older people is age-related macular degeneration, a deterioration of the macular region of the retina. As with cataracts, risk factors for age-related macular degeneration include oxidative stress from sunlight. Preventive factors may include supplements of the omega-3 fatty acids, some B vitamins (folate, vitamin B6, and vitamin B12), antioxidants (vitamin C, vitamin E, and beta-carotene), zinc, and the carotenoids lutein and zeaxanthin
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Missy visits a doctor because she feels tired most of the time, is easily distracted, and feels chilled. As part of her examination, Missy has blood drawn to be tested for concentrations of nutrients and their by-products. This part of the examination is the
A. biochemical evaluation. B. physical examination. C. clinical examination. D. anthropometric assessment.
When considering the digestion and absorption of proteins, it is important to know that:
a. proteins are broken down into individual amino acids and absorbed by all intestinal cell absorption sites at an equal rate. b. larger peptide molecules must be completely broken down into amino acids to be absorbed into the bloodstream from the intestine. c. cells in the small intestine absorb different types of amino acids at separate absorption sites, which causes competition by similar amino acids at these absorption sites. d. amino acids need a carrier in the bloodstream because they do not transport very well alone. e. protein digestion and absorption requires simultaneous ingestion of some form of carbohydrate.
Besides death and taxes what else is certain in life?
a. fun b. change c. work d. politics
Nutrient supplements known as "green pills" often contain ____.?
A) ?mostly food coloring B) ?high-potency vitamin C C) ?dehydrated alfalfa and parsley D) ?dried extracts of spoiled meats