According to the current body of scientific research, what effect does exercise have on an athlete's vitamin requirements?
a. Increases the need substantially, making vitamin supplementation necessary
b. Increases the need substantially, but supplementation not necessary
c. Increases the need slightly, but supplementation not necessary
d. Increases the need slightly, making vitamin supplementation necessary
c
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A. erythrocytes B. cytotoxic T cells C. B cells D. antigens
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Fill in the blank(s) with correct word
Explain the benefits of intestinal flora to health
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