Assertion: tryptophan | /r/HasProperty | obtained
Facets:
value: from plant or animal sources
type: OTHER
value: from the diet
type: OTHER
Source sentences:
text: As well, he demonstrated that tryptophan and several other amino acids cannot be manufactured in the body and must be obtained from the diet.
text: Tryptophan can be obtained from plant or animal sources and is widely used in alternative medicine to help treat insomnia, anxiety, depression, and even PMS.