Carrots for beta carotene. Eggs give an almost silky type lather. Buttermilk is high in alpha hydroxys. Not sure what all survives the saponification process, but I LOVE my Buttermilk, Carrot and Egg soap for my face. Makes it feel like a baby's butt.. eta: strawberry puree could probably be used in CP, but I would think it would turn the soap some sort of tan/brown.