For the record, I LOVE drinking eggs. It's convenient, economical, and I actually enjoy the taste.
Last year when I started the Anabolic Diet I was drinking a 1-1.5 dozen raw eggs a day. Yes, that's 12-18 eggs.
After 4 or 5 months of this, MY HAIR STARTED TO FALL OUT!!! Not just 'thinning', but I had a couple of seemingly random bald spots across on the back of my head. What was really weird was that it was not male-pattern baldness, this was confirmed by the dermatologist as well as the fact that there is no cases of balding on either side of my family.
Long story short, after getting multiple rounds of cortizone shots into my head (the MD thought it was an immune-response alopecia areata), I read about the whole raw eggs/biotin deficiency thing. I stopped the raw eggs and began biotin supplementation.
After a few weeks of the supplementation, the hair grew back and my bald spot is gone and everything seems back to normal, albeit I'm convinced my hair is still thinner in those spots.
I still eat a lot of eggs, I just cook them now.
BTW, I believe Mercola revised his stance on raw eggs, I think he now cautions in the overeating of raw eggs.
Clumps of your hair falling out, and weird bald spots on your head is something I wouldn't wish on my worst enemy.