title: Letter: Dietary carbohydrate increases brain tryptophan and decreases free plasma tryptophan.
mesh_terms: D000818:Animals; D001921:Brain / Q000378:metabolism*; D001923:Brain Chemistry; D004040:Dietary Carbohydrates / Q000378:metabolism*; D005947:Glucose / Q000008:administration & dosage; D008297:Male; D051381:Rats; D012701:Serotonin / Q000096:biosynthesis; D014364:Tryptophan / Q000032:analysis / Q000097:blood / Q000378:metabolism*
chemical_list: D004040:Dietary Carbohydrates; D012701:Serotonin; D014364:Tryptophan; D005947:Glucose