Is there casein in whey?
Correspondingly, is casein in whey protein powder?
Like Whey, Casein Is Derived From Milk Milk contains two types of proteins -- casein and whey. Casein is 80% of the milk protein, while whey is 20%. Casein protein is digested slowly, while whey protein digested quickly. This is an important difference between these two popular dairy proteins.
In this way, is lactose in casein or whey?
Whey is one of two proteins found in milk. The other is casein. The two are separated by adding specific enzymes which split the milk into liquid and solid particles. If you know you are lactose intolerant, a whey concentrate would not be a good choice, and even an isolate can cause discomfort.
That said, whey is better for protein synthesis and growth, is usually easier to consume, tastes better, and is cheaper. But casein is better for preventing muscle protein breakdown, so a combination of both is ideal. Use whey protein supplements post workout, and use casein before you go to sleep.