Whey permeate (WP) is a low-protein co-product derived from whey. It is obtained by the ultrafiltration of sweet whey and is high in lactose, glucose and galactose.
To meet the high energy needs of lactation, dairy cows are offered starch-rich diets, mainly from cereal grains. Whey permeate is used in the feeding of dairy cattle as a cereal grain replacement, it is an energy dense byproduct, which reduces feed costs, improves the energy balance (i.e. protein/energy in the rumen), increases the digestibility and palatability of the diet, and improves feed efficiency.