Nanazhu66 review for Clinical Niacinamide 20% Treatment

It is a highly concentrated niacinamide (20% vitamin B3) serum with purple opaque glass bottle. Light yellow liquid without strong smell. Non-greasy, very easily absorbed by the skin. I used it for a week and only used it at night after cleansing my face. No obvious irritation on the first day of use, but as the number of days grows, the face will feel a clear tingling sensation. Please do not use the serum on the wound on the face. I haven't seen any obvious effect on my face yet, but I will stick to it, and I will use it less often, about three days a week. I hope it really improves blotchy tone.