Assertion: collagen | /r/MadeOf | proline
Facets:
Source sentences:
text: Dr. Amy Myers, M.D. notes, “Collagen contains the amino acids glycine and proline, which can aid in reducing joint pain and help to increase joint mobility because of their anti-inflammatory properties, similar to those of ibuprofen.
text: Collagen contains glycine, lysine and proline, which can be used by the body to build connective tissue structures.