Castello cheeses cheese, named Noble Blue Cheese, Extra Danish Creamy Blue (also available sliced), Soft Blue, and Crumbled Blue Cheese. In 2012, the Denmark's Finest Havarti Cheeses were added to the Castello brand, followed by Saga Blue Brie in 2013. The Alps Selection Cheeses; Hirten, Bergkase, and Weissbier, were launched in the United States in the end of 2012, and were the first of their kind available in the United States. In some markets, the name Blue Castello is used for a triple-cream blue cow's milk cheese. Castello was established in 1893 by Rasmus Tholstrup of Denmark. His son, Henrik, bought a
Blue cheese and the secondary fermenters, "Penicillium roqueforti", take over and break the lactic acid down, maintaining a pH in the aged cheese above 6.0. As the pH rises again from the loss of lactic acid, the enzymes in the molds responsible for lipolysis and proteolysis are more active and can continue to ferment the cheese because they are optimal at a pH of 6.0. "Penicillium roqueforti" creates the characteristic blue veins in blue cheese after the aged curds have been pierced, forming air tunnels in the cheese. When given oxygen, the mold is able to grow along the surface of the