Assertion: tryptophan's level | /r/HasProperty | linked to heart disease
Facets:
value: according to an article
type: OTHER
Source sentences:
text: Too high or too low levels of serotonin have been linked to diseases such as irritable bowel syndrome (IBS), heart disease, and osteoporosis — a disease that weakens the bones — according to an article published in April 2016 in the journal Cell.