Niacinamide (Vitamin B3) is indicated to reduce the appearance of skin blemishes and congestion. A high 10% concentration of this vitamin is supported in the formula by zinc salt of pyrrolidone carboxylic acid to balance visible aspects of sebum activity.
Do not use at the same time as Vitamin C. Use Vitamin C at PM and this at AM.
My go too daily serum
I'm impressed with it.