Because this patient is largely asymptomatic, you can probably rule out other rare conditions such as eosinophilia myalgia syndrome, eosinophilic fasciitis, and systemic fungal infections.

J. Varga, J. Peltonen, J. Uitto, S. Jimenez, "Development of diffuse fasciitis with eosinophilia during L-tryptophan treatment: Demonstration of elevated type I collagen gene expression in affected ...

Several natural remedies for depression have captured the public’s fancy in recent years, including St. John’s wort, tryptophan and SAM-e. Now, an amino acid called 5-HTP, or hydroxytryptophan ...

Tryptophan supplements were common sleep aids in the 1980s, but they were banned in 1991 after being linked to a painful flu-like illness called eosinophilia-myalgia syndrome.