I've been using this niacinamide
"I've been using this niacinamide serum consistently and it made a noticeable difference to my skin. My skin looked brighter, smoother and healthier overall. It helped reduce the dullness I was experiencing and suited my skin without causing irritation. After I ran out of it I actually noticed the difference, which shows how well it was working for me. Definitely a product I'll repurchase."