This proposed BMAA-ALS/PDC link is based largely on the presence of BMAA in traditional dietary items of the Chamorro people of Guam [12,13,14] and on the reported presence of BMAA in the brain tissue of Chamorro ALS/PDC, Canadian AD, sporadic ALS and PD patients [15,16,17]. The gene discussed is PDC; the disease is Parkinson disease.