" Believed to have originated in a cave in Roquefort, France, blue cheese is available in a handful of varieties including gorgonzola, stilton, and cambozola. The blue veins characteristic of blue cheese develop from the bacteria Penicillium Roqueforti that grow within small punctures created on top of the cheese loaves at the beginning of the cheese ripening process.

Though blue cheese is typically high in sodium, it is rich in dairy protein, dietary fats, and essential vitamins and minerals including calcium, phosphorous, potassium, zinc, and vitamin A. What makes each variety different is the type of milk used, the length of ripening, and the result texture and flavor."

https://www.verywellfit.com/blue-cheese-nutrition-facts-and-health-benefits-5206366
https://www.medicalnewstoday.com/articles/blue-cheese-types-benefits-risks-and-more

Mmmm, cheese.