Question: has buttermilk got lactose in it?
Answer: Lactose-Free Milk and Acid Buttermilk is lower in lactose than regular milk, so people with lactose intolerance may find that they can tolerate it ( 3 ). However, if you have a very low tolerance for lactose, you can make a buttermilk substitute with lactose-free milk — though it may taste a bit on the sweet side (4).