Tryptophan? Triptifan is a common misspelling of tryptophan.
Tryptophan (also known as L-tryptophan) is an essential amino acid that is not naturally produced by the human body. As a result, people must obtain tryptophan through dietary means. Some people choose to use tryptophan supplementation, but these supplements may not be safe for use. There is some concern that tryptophan may be responsible for a very serious condition known as eosinophilia-myalgia syndrome (EMS). Before using tryptophan supplements, make sure to talk to your healthcare provider about any other medications you are taking and about any existing medical conditions you have.
(Click Tryptophan for more detailed information about this amino acid, including an explanation of how tryptophan works, possible side effects, and important precautions and warnings to be aware of before starting the supplement.)