Does Tryptophan Work?
Final Thoughts on Tryptophan EffectivenessTryptophan may work for PMDD, smoking cessation, and depression, although much more research is necessary to confirm these early findings. There is not enough evidence to suggest that tryptophan is effective for other uses. It is important to remember that tryptophan is classified as a dietary supplement (not a drug) and is, therefore, less strictly regulated than drugs. Also, there are significant concerns about the safety of tryptophan, and the potential risks often outweigh any possible benefits.