Yeast is used, and the process isn't any different than supermarket white buns. Industrial white bread processes do tend to involve very high speed/power mixin

Yeast is used, and the process isn't any different than supermarket white buns. Industrial white bread processes do tend to involve very high speed/power mixing that incorporates more air and leads to a smaller crumb structure than traditional bread, but it's certainly not squirted out as a foam.