Purchased from the official shop. I bought two at the same time, but I'm selling this one after using one bottle. Dark spot correcting serum containing 10% niacinamide and 4% TXA. - Brand: Anua - Product Name: Niacinamide 10% + TXA 4% Dark Spot Correcting Serum - Contents: 30ml - Features: Dark spot correction Thank you for looking.