You cannot completely or safely digest a raw egg white. You could end up with Salmonella, Also there is an enzyme found in raw egg whites that blocks the uptake of Vitamin B6, which is not optimal. You must cook the egg whites to eliminate the threat of Salmonella and to neutralize the Avidin (enzyme) in order to allow your body to safely digest the protein.
Liquid egg whites, that are low heat pasteurized, cooks the egg whites at 134 degrees. This temperature kills any salmonella and neutralizes the Avidin enzyme without damaging the protein which allows the egg whites to be digested optimally.
Liquid Egg Whites are liquid but not raw
When you cook an egg white to the point of scrambled eggs (over 134 degrees), you begin to destroy the true value of the protein.
Drinking pasteurized egg whites is better than cooking them....but the same is not true for raw eggs.