I eat alot of egg whites as well but I cook them to reduce the possibility of biotin deficiency issues and also take 1000mcg biotin pill every day just to be safe.
"By Dr. Mercola
Notice: Important 2009 Raw Egg Update
Since publishing this article in 2005, I have more carefully studied the issue of whether to consume WHOLE raw eggs or only egg yolks ... and my recommendation is to eat the WHOLE egg raw, as I originally advised in 2002.
Avoiding raw egg yolks is the conventional nutritional dogma as raw egg whites contain a glycoprotein called avidin that is very effective at binding biotin, one of the B vitamins. The concern is that this can lead to a biotin deficiency. The simple solution is to cook the egg whites as this completely deactivates the avidin.
The problem is that this also completely deactivates nearly every other protein in the egg white. While you will still obtain nutritional benefits from consuming cooked egg whites, from a nutritional perspective it would seem far better to consume them uncooked.
Two groups brought me to back this: pet owners who feed their pets raw foods and Aajonus Vonderplanitz, who wrote the raw food book We Want to Live. Both feel quite strongly that raw eggs are just fine to eat.
After my recent studies it became clear that the egg's design carefully compensated for this issue.
It put tons of biotin in the egg yolk. Egg yolks have one of the highest concentrations of biotin found in nature. So it is likely that you will not have a biotin deficiency if you consume the whole raw egg, yolk and white. It is also clear, however, that if you only consume raw egg whites, you are nearly guaranteed to develop a biotin deficiency unless you take a biotin supplement.
So to be clear, my advice is that you can safely eat WHOLE raw eggs, from a healthy fresh source. Personally I eat four whole raw eggs each morning with my breakfast."