The hair, skin, and nails are part of which system?
a) limbic
b) circulatory
c) musculoskeletal
d) integumentary

Explain which dri value would you use to make sure that the vitamin supplement that you use does not contain too much vitamin a

Which of the following represents the results of a review of well-controlled studies of vitamin c supplementation on the resistance to, and recovery from, colds? there was a reduction in the duration of colds by 50% on the average. there was a slight effect on reducing the duration and severity of colds for people taking vitamin c supplements. there was a significant reduction in the duration of colds in people who consumed at least one gram a day. there was a significant reduction in the number of colds only in people who consumed > three grams per day.

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