> 5-HTP is a precursor to serotonin and taking it for about a week before your experience allows your body to synthesize more Prolonged use of 5-HTP will also

> 5-HTP is a precursor to serotonin and taking it for about a week before your experience allows your body to synthesize more Prolonged use of 5-HTP will also cause heart problems, same reason fen-phen does. https://en.wikipedia.org/wiki/Fenfluramine/phentermine#Adverse_effects https://en.wikipedia.org/wiki/Fenfluramine/phentermine#Adver... I don't know of any studies of exactly how much is needed to cause problems, before taking 5-htp one might want to look into that! I am always rather concerned that 5-htp is available OTC, and is even added to energy drinks, when it is known to have such harmful effects.