Lignans from Carthamus tinctorius suppress tryptophan breakdown via indoleamine 2,3-dioxygenase.
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Phytomedicine. 2013 Oct 15;20(13):1190-5. doi: 10.1016/j.phymed.2013.06.006. Epub 2013 Jul 15.
Phytomedicine. 2013.
PMID: 23867649
Free PMC article.