Assertion: precursor tryptophan | /r/RelatedTo | increased risk of depression
Facets:
value: according to a 2007 article
type: OTHER
Source sentences:
text: In fact, a deficiency in niacin, and its precursor tryptophan, is related to an increased risk of depression, according to a 2007 article published in the "Journal of Psychiatry and Neuroscience.