Is it bad if you mix makeup brands during your application? I personally mix brands often. You may like a foundation from one company, the shadows from another, and the blush and lipstick from yet another and you can use all of these companies during an application if it gives you your desired look. I would only say stay within a brand for skin care products because they are usually designed to be used and work together as a regiment…cleanser, toner, moisturizer etc… Please log in to view content...