What amino acid has been linked to the development of the rare blood disorder eosinophilia myalgia in people who took it as a supplement?

Question

Quizplus · Accepted Answer

Tryptophan has been linked to the development of eosinophilia myalgia in people who took it as a supplement. In the late 1980s, a contaminated batch of tryptophan supplements caused an outbreak of eosinophilia myalgia syndrome, a rare blood disorder that causes severe muscle pain and weakness. The contaminant was traced to a Japanese manufacturer and the incident led to stricter regulation of supplements in the US.

What Amino Acid Has Been Linked to the Development of the Rare