As a rule of thumb it will about double in volume (1/2 cup raw = 1 cup cooked). There's not any change in the amount of calories (unless you cook your oats in milk as noted above). It's traditional to add brown sugar and raisins to oatmeal.
Knowledge center. Collagen is the most abundant protein in the human body and is the substance that holds the whole body together. It is found in the bones, muscles, skin and tendons, where it forms a scaffold to provide strength and structure.1,2.
Collagen is a major structural protein in the skin. It plays a key role in providing the structural scaffolding for cells, tissues, and organs. If it weren't for collagen, the body would literally fall apart.