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Is it mood interaction with dopamine receptors

Where the Cycling Myth Came From 1

Dolgintsev, Effects of Tripeptide Gly-His-Lys in Pain-Induced Aggressive-Defensive Behavior in Rats
Promoting the use of such compounds for healing and performance enhancement is unethical and banned by the US Anti-Doping Agency

doi:10.1038/nrm778
