There are two types of Whey protein, concentrate and isolate. Whey protein isolate is a more "pure" form or whey protein that does not contain lactose. Whey co

There are two types of Whey protein, concentrate and isolate. Whey protein isolate is a more "pure" form or whey protein that does not contain lactose. Whey concentrate is cheaper, but does contain some lactose. The site mentions that the formula is lactose free, so I imagine they are using Whey Isolate.