Whey

Whey is a protein that comes from milk. You know how when you leave some milk in the fridge for a while, a yellowish liquid separates from the other white stuff? That yellowish liquid is whey! Whey is the liquid part of milk that is left over when you make cheese, because the curds (the white stuff) are used to make cheese.

Whey protein is super good for us because it helps our muscles grow healthy and strong! It's like the building blocks for our muscles! It's also really easy for our bodies to use and absorb, so we can use it for energy right away.

You can find whey protein in lots of different things like protein powders or milkshakes, and even in some breakfast cereals. So if you want to make your muscles grow big and strong, try adding some whey protein to your diet!