In 1990, the U.S. Food and Drug Administration (FDA) temporarily pulled all L - tryptophan products off the market after more than 1,500 people who took L - tryptophan supplements developed a blood disorder called eosinophilia myalgia syndrome. (health.com)
In 1989, more than 1500 people around the world contracted eosinophilia malgia syndrome (EMS), a rare blood disease that causes tissue damage similar to burns, and sometimes death. (sciencemag.org)
One more thing is important, investigating food, medication, and other allergies in patients with high IgE or eosinophilia in GI biopsies. (kresserinstitute.com)