Is it true that using a blender with protein powder, like whey, is bad because the blender can break up the amino acids? This sounds crazy to me, but I've heard it more than once, so I thought I'd ask.
The best I could find was this forum. This post
Mechanical agitation will have no effect on the chemical bonds of the protein. It's like saying that a blender will break up water into hydrogen and oxygen. Last time I checked that didn't happen.
As long as you don't throw the shake into the microwave you are fine
seemed compelling, but it didn't exactly cite anything to back it up.