If your skin is used to changing brands frequently and you haven't had any adverse response, you can do it with LIV MD and combine with another brand, but always following the order that is indicated and try first in a small area to rule out any type of allergy. Always remember: If you have doubts about the order in which the products should go on the skin, apply them in order of texture: thin and watery, ending with the thickest and fattiest