Hydrolysates are proteins that have been partially digested into smaller peptides.

• A. A protein concentrate produced by ultrafiltration
• B. A protein isolate with minimal carbohydrate content
• C. A protein that has been partially digested into smaller peptides
• D. A synthetic peptide supplement

Answer: (C)

Hydrolysates come from proteins that have undergone hydrolysis, where peptide bonds are cleaved to yield smaller peptides and amino acids. This partial digestion is what defines a hydrolysate, making the protein easier to digest and often faster to absorbed.

So the description that a protein has been partially digested into smaller peptides is the best match. The other descriptions describe products by purification or separation (a concentrate produced by ultrafiltration or an isolate with minimal carbohydrates) or a synthetic peptide supplement, none of which specify the partial digestion that defines hydrolysates.