Which dairy product is made from fermented milk?

Yogurt is made from fermented milk, which involves the use of specific bacterial cultures that convert lactose (the sugar found in milk) into lactic acid. This fermentation process gives yogurt its characteristic tart flavor and thicker consistency compared to regular milk. The bacteria used in yogurt, typically Lactobacillus bulgaricus and Streptococcus thermophilus, are essential for the fermentation process and contribute to the product's probiotic benefits.

Cheese is also made from fermented milk, but it involves additional processes such as curdling and aging, making it distinct from yogurt in its production method and composition. Butter, on the other hand, is made by churning cream to separate the fat from the buttermilk and does not involve fermentation. Ice cream is created through freezing a mixture of cream, sugar, and flavorings and does not involve fermentation either. Thus, yogurt is specifically highlighted for its straightforward process of fermentation, leading to its unique properties.