I believe it's raw egg that cancels out biotin. If memory serves me well enough, I think I read that from Adele Davis in the 70's. Thanks, Oliva ----- Original Message ----- From: "Kathryn Rosenthal" <[log in to unmask]> I've read that by eating only egg whites we are actually leaching biotin out of the body. Not sure if this is true. Kath