Hypoalbuminemia in the absence of hepatic, renal, and nutritional deficiency may indicate protein malabsorption or protein losing gastroenteropathy. Abuse of laxatives like castor oil can cause protein losing gastroenteropathy(l). Castor oil is hydrolyzed in the intestine by pancreatic lipase to glycerol and ricinoleic acid. Ricinoleic acid acts as a mild irritant and causes purgation. It is al...