title: Effect of age on variables influencing the supply of tryptophan to the brain.
mesh_terms: D000375:Aging; D000596:Amino Acids / Q000097:blood; D000818:Animals; D001692:Biological Transport; D001812:Blood-Brain Barrier; D001921:Brain / Q000378:metabolism*; D005230:Fatty Acids, Nonesterified / Q000097:blood; D006897:Hydroxyindoleacetic Acid / Q000378:metabolism; D007700:Kinetics; D008297:Male; D051381:Rats; D012701:Serotonin / Q000378:metabolism; D014364:Tryptophan / Q000097:blood / Q000378:metabolism*
chemical_list: D000596:Amino Acids; D005230:Fatty Acids, Nonesterified; D012701:Serotonin; D006897:Hydroxyindoleacetic Acid; D014364:Tryptophan