Blue cheese of blue veins. The distinctive flavor and aroma of blue cheese arises from methyl ketones (including 2-pentanone, 2-heptanone, and 2-nonanone) which are a metabolic product of "Penicillium roqueforti". These compounds are not formed in other types of cheese fermented by bacterial acidification alone. In the European Union, many blue cheeses, such as Cabrales, Danablu, Gorgonzola, Roquefort and Blue Stilton, carry a protected designation of origin, meaning they can bear the name only if they have been made in a particular region. Similarly, individual countries have protections of their own such as France's Appellation d'Origine Contrôlée and Italy's Denominazione di Origine
Canadian cheese Lewis Kraft, it did correspond with the rise of Kraft's processed cheese empire." In the more recent history of Canadian cheese, President Donald Trump has said that Canada will no longer be renegotiated with in the North American Free Trade Agreement (NAFTA) due to its new tariff of nearly 300 percent on dairy. Canadian cheeses are classified into six categories per their moisture content, which are firm, soft, semi-soft, fresh, blue-veined and hard, with most cheeses being classified as firm, soft, or semi-soft. Canada presently produces over 1,050 varieties and brands of cheese. More than half of the cheese manufacturers