When it comes to skincare, it’s important to use products that are safe and effective. While some ingredients can be combined to create powerful treatments, others can cause irritation or even damage to your skin when mixed. In this article, we’ll discuss skincare ingredients that should not be mixed and why. 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…