how much lactose in whey
Lactose Several million tons are produced annually as a by-product of the dairy industry. Whey is made up of 6.5% solids of which 4.8% is lactose, which is purified by crystallisation. Whey or milk plasma is the liquid remaining after milk is curdled and strained, for example in the production of cheese. Lactose comprises about 2â8% of milk by weight. Industrially, lactose is produced from whey permeate â that is whey filtrated for all major proteins. The protein fraction is used in infant nutrition and sport nutrition while the permeate can be evaporated to 60â65% solids and crystallized while cooling . Lactose can also be isolated by dilution of whey with ethanol. Metabolism