When it comes to skincare, it’s important to use products that are safe and effective. Combining Ingredients can either make or break your skin. Read to find out which skincare ingredients to not mix. Retinol and Vitamin C Retinol is a powerful anti-aging ingredient that stimulates cell turnover, while Vitamin C is an antioxidant that brightens and protects the skin. However, when these two ingredients are combined, they can cancel each other out and irritate. Retinol is best used at night, while Vitamin C is best used during the day. Benzoyl Peroxide and Retinol Benzoyl peroxide is a common acne-fighting ingredient that works by killing acne-causing bacteria, while retinol stimulates…