Discussion Questions Sci/220

638 Words3 Pages
1) What is the primary function of the vitamin D hormone? Which groups of people likely need to supplement their diets with vitamin D, and on what do you base your answer? The primary function of vitamin D hormone is to help regulate the blood calcium and bone metabolism. It also helps with the development of some cells, to reduce cancer and contributes to the development of skin cells. All age groups need to add vitamin D into their diet, children need the vitamin to help them grow up healthy, many children who do not get enough vitamin D often get rickets. As a young adult they need the vitamin D to help their immune system, and even help prevent some cancers. The older adult needs the vitamin to prevent osteomalacia. Older adults, dark skin people, and people not exposed to enough sunlight are the people in need of more vitamin. 2) Which vitamins are lost from cereal grains as a result of the “refining” process? Which vitamins must be replaced by law in the subsequent enrichment process? The vitamins lost from cereal grains from refining are seeds are crushed and the germ, bran, and husk layers are lost so they are replaced with B vitamins, which are, thiamin, riboflavin, niacin, and folic acid. But are still low on vitamin E, vitamin B-6, potassium, magnesium, and fiber that are found in gains 3) Is it necessary for North Americans to consume a great excess of vitamin C to avoid the possibility of a deficiency? Do vitamin C intakes well above the RDA have any negative consequences? If larger amounts of vitamin C are consumed the absorption drops down to only 50%, compared to 70%-90% absorption when consumed the recommended amount. Also large consumptions of the vitamin can cause is diarrhea. But in some cases it is necessary for Americans to consume larger amounts of vitamin C, such as pregnant women, smokers, alcoholics, and those with low
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