Generally and combination of high and low weights are the best. Here is why the above is true. Let's take soy protein. It does little to the cortex. It does help the cuticle immensely.
Some companies claim to have mol.
This helps the cortex. It does little for the cuticle. In our opinion a combination of weights is the best. Also, many proteins have advantages regardless of size. Hydrolyzed animal protein is fine.