date:Aug 20, 2015
ial lactose digestion and provision of ?-galactosidase (lactase), which continue to break down lactose after consumption. Both of these attributes would have assisted early humans in tolerating the substantial lactose loads that accompany milk consumption and would otherwise cause seriously debilitating adverse gastrointestinal effects.
In all mammalian species, intestinal lactase, highly active when the young are receiving their mothers milk, is down regulated in a coordinated manner speculate