Is buttermilk fattening?!
Is buttermilk fattening?
Butter is fattening, right. So buttermilk must be fattening too, right?
Answers:
When you churn cream, you get butter and buttermilk. The butter is 80% fat, and the buttermilk is almost entirely nonfat.
They don't sell that in stores. What they sell is "cultured buttermilk", a cultured product much like kefir. They add a culture to skim milk, let it go for a while, and add salt, sodium citrate (a salt form of citric acid), vitamin A palmitate and vitamin D3.
A cup of cultured buttermilk has only 120 calories. It only provides 4% of the recommended daily allowance of fat, but 35% of the RDA for calcium and 25% of the RDA for vitamin D. It provides 10 grams of protein.
(And your premise about butter is wrong, too. Trans fats are fattening, but not butter - but that's not what you were asking about.)