I checked this on multiple sites and it appears to be true in which case we should all know it and pass it on!
Keep in mind this treatment of burns which is included in teaching beginner fireman this method. First aid consists to spraying cold water on the affected area until the heat is reduced and stops burning the layers of skin. Then, spread egg whites on the affected are.
One woman burned a large part of her hand with boiling water. In spite of the pain, she ran cold faucet water on her hand, separated 2 egg white from the yolks, beat them slightly and dipped her hand in the solution. The whites then dried and formed a protective layer.
She later learned that the egg white is a natural collagen and continued during at least one hour to apply layer upon layer of beaten egg white. By afternoon she no longer felt any pain and the next day there was hardly a trace of the burn. 10 days later, no trace was left at all and her skin had regained its normal color. The burned area was totally regenerated thanks to the collagen in the egg whites, a placenta full of vitamins.