Any suggestion for the best serum?

I've just finished Vitamin C and Niacinamide serums. I was using both for about half a year, and I can definitely see some changes. Most of my acne scars are gone, and my skin looks brighter. I think a combination of Vitamin C and Niacinamide can help you too 🙂

you need vitamin C. I can recomend those products. they are best