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10.2174/1381612823666170220163219 123 SikiricP.SeiwerthS.RucmanR.KolencD.VuleticL
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Vitamin D and Serotonin: The Biochemical Link Vitamin D helps activate the enzyme tryptophan hydroxylase , which is the rate-limiting step in converting the amino acid tryptophan into 5-hydroxytryptophan (5-HTP)—the direct precursor to serotonin (Patrick & Ames, 2014)
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