The best replacement for egg whites is whole eggs.

The best alternatives to egg whites are rated as following:
★★★★★  whole eggs
★★★★★  egg yolks
★★★★  eggs
★★★  egg beaters
★★★  yolks
★★  yolk
★  whole egg
★  egg yolk
★  egg
  meringue powder
  egg yoke
  protein powder
  substitutes
  regular eggs

Your alternative for egg whites is not listed? Suggest!
Speaking about egg whites, one probably shouldn't forget about stiff peaks.

Other search terms related to egg whites and their ratings are:
★★★★★ stiff peaks
★★★ cream of tartar
★★★ oatmeal
★ peaks
★ meringue powder
You have in mind a companion for egg whites and it is not yet here? Propose!



Google Trends

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egg whites
whole eggs
egg yolks