Yogurt is nutritionally rich in protein, calcium, riboflavin, vitamin B6, and vitamin B12.[40] It has nutritional benefits beyond those of milk, namely due to its probiotics.[41] Lactose-intolerant individuals may tolerate yogurt better than other dairy products due to the conversion of lactose to the sugars glucose and galactose, and the fermentation of lactose to lactic acid carried out by the bacteria present in the yogurt.[42] Yogurt contains varying amounts of fat. For example, some cows'-milk yogurts contain no fat; others of low fat content have 2% fat, whole-milk yogurt may have 4% fat; some yogurts sold as "Greek-style" may have about 10% fat.[43][44]