Nomination Summary for Tryptophan microcontaminants (N97001)
Nomination Date: 11/02/1996
Nominator: Private Individual
Rationale: Some people who used the dietary supplement L-tryptophan developed illnesses such as eosinophilia-myalgia syndrome (EMS). It was hypothesized that tryptophan microcontaminants such as 1, 1-ethylidenebis(tryptophan) (EBT) and 3-phenylamino) alanine (PAA) were responsible for the reported illnesses.
NTP Principles: not specified