Sweet Whey Powder (SWP) is produced by drying Sweet Whey Concentrate – a by-product from hard cheese production. Poland Food provides SWP which undergoes the procedure of spray drying used to ensure a good flow. Acid Whey Powder (AWP) is a by-product of cheese or acid casein production. It is produced by drying fresh whey obtained from soft white cheese. With the use of microbial fermentation, milk pH becomes lower and lactose is changed into lactic acid. Demineralized Whey Powder (DEMI) is produced through the removal of part of minerals from liquid sweet whey. Depending on the purpose, many techniques are combined: ion exchange, electrodialysis, ultrafiltration, microfiltration, or nanofiltration.