Which of the following is a true statement about vitamins?
a. All species have the same basic vitamin requirements.
b. They are stored in large quantities in the liver.
c. They may be produced by intestinal microorganisms.
d. They are inorganic nutrients, needed in small amounts, which often function as cofactors.
e. Because they are fat soluble, they may be provided in insufficient quantities in a low-fat diet.
Answer: c. They may be produced by intestinal microorganisms.
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