sudo9 review for 10% Azelaic Acid + 10% Niacinamide Acne Control Serum

I've just used this it about 5 days, but my skin has never looked better. I had a few very minor acne scars that have mostly disappeared. My skin has improved in appearance and is no longer red and inflamed. This is a product that I will never be without. After cleansing with a mild cleanser, I use this. They function nicely together, and I'm already quite pleased with the results.