Tag: Tryptophan supplements

In 1989, L-tryptophan supplements were famously linked to over 1,500 cases of Eosinophilia-Myalgia Syndrome (EMS), a debilitating and sometimes fatal condition. While tryptophan is an essential amino acid found naturally in many foods, the problem lies primarily with the unregulated supplement form, which can carry risks such as contamination and dangerous drug interactions.

Over 1,500 cases of eosinophilia-myalgia syndrome (EMS) were linked to contaminated L-tryptophan supplements in 1989, leading to a temporary ban. Today, purified tryptophan supplements are back on the market, but consumers must understand their uses, risks, and the difference between L-tryptophan and its metabolite, 5-HTP.