If they are raw and unpasteurized, you will deplete your body of vit B. I forget which B, but if you do a search on here it will tell you all about it.
Yeah, raw egg whites have an "Anti-Nutrient" called Avidin that is a glycoprotein that binds to the B vitamin biotin.
Not much to worry about but I'm surprised that you didn't post here asking why you have suddenly started growing feathers.