Final answer:
Amino acids are the main product of protein digestion absorbed by the small intestine through carrier proteins.
Explanation:
Amino acids are the primary product of protein digestion that gets absorbed into the bloodstream by the small intestine. While free amino acids are the major form for absorption, dipeptides and tripeptides are also absorbed. Carrier proteins facilitate the absorption process, with most proteins being digested and absorbed in the small intestine.
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