The non-protein amino acid BOAA, found in chickling peas, can cause neurological symptoms within three to six months of ingestion.

“the non-protein amino acid boaa present in chickling peas lathros sativas has been implicated in neurologism and they say here that if boa was present in a diet fortified with the same amount of boaa in humans the onset of symptoms usually occurs three to six months after ingestion of a diet rich in this non-protein amino acid”