@stev1ii: I have been testing this amazing serum for 2 weeks now and it has helped my acne prone skin SO MUCH !! @TIRTIR <3 •Mentioned product: TIRTIR Niacinamide 20% Serum Contains: - niacinamide 20% - retinol % - glutathione #tirtir #skincare #koreanskincare #hyperpigmentation #kbeauty #koreanserum #koreanskincarereview #skintransformation #clearskin #glassskin #viral #fyp #tirtirniacinamide20serum #cloggedpores #acne #serum #acneproneskin