The amino acids 5-hydroxytryptophan (5-HTP) and l-tryptophan are precursors of serotonin. 5-HTP is generally recommended over l-tryptophan because it crosses the blood-brain barrier at a higher rate, ...

The normotensive Wistar-Kyoto rats (WKYs) serve as controls in the “genetic model” of hypertension as represented by the spontaneously hypertensive rats (SHRs). L-Tryptophan does lower blood pressure ...

5-Hydroxytryptophan (5-HTP) is a naturally occurring amino acid produced from the essential amino acid L-tryptophan. 5-HTP is the precursor for neurotransmitters, which are chemicals that transmit a ...

For permission requests, please contact NEJM Reprints at [email protected] The subjects for this study consisted of 16 apparently healthy social drinkers ranging in age from twenty-five to fifty-seven ...

No Thanksgiving is complete without a turkey at the table—and a nap right after it’s eaten. The meat has a bad reputation for making eaters sleepy, but is there really science to back that up? Here’s ...