Digestive system disease - Colitis, Crohn's, Ulcerative | Britannica
The lactose in the milk is not broken down, and it stays in the lumen of the small intestine, drawing water to it. The ... Diarrhea is common in those who are deficient in lactase, the enzyme that splits lactose (milk sugar) into its component parts ...
Luis Federico Leloir
... where he began research on the formation and breakdown of lactose, or milk sugar, in the body. That work ultimately led to his ...