I have used pea protein powder instead egg whites protein. (marksdailyapple.com)
I did add a scoop of plain pea protein powder for some extra staying power, which required an excessive amount of added almond milk and cinnamon to disguise. (sinfulnutrition.com)
I even add pea protein powder, and natural supplements to make sure my little guy gets everything he needs. (loveandduckfat.com)