An acute illness (Jamaican vomiting sickness) which affected two adults after 
eating unripe ackee fruit was investigated. Analyses of serum and urine samples 
were performed to compare the patterns of organic acidaemia and aciduria with 
those reported from childhood cases. The main conclusion from the comparison is 
that the toxic ackee constitutent, hypoglycin, produces essentially the same 
metabolic effects in adults as in children.