Some products just don’t get along! Although vitamin C is wonderful, there are a few products it should never be mixed with since it could cause irritation or ineffective results. Never layer vitamin C with benzoyl peroxide, retinol, alpha hydroxy acids and beta hydroxy acids, and niacinamide. Instead, if you're set on using vitamin C and these products, apply vitamin C serums in the morning and your other products in the evening. You can still use your products with these ingredients, just don’t layer them on at the same time. Vitamin C serum is totally worth using as part of your skin care routine! It can work for every type of skin and has so many great benefits. Start applying your vitamin C and see the results quickly!