500 IU vs 880 IU — Which Retinol Is Actually Right for Your Skin?
When people compare the 5,000 won Daiso retinol to the 59,000 won Iope serum, the conversation usually goes one of two ways. Either: the cheaper one is a waste of time. Or: the expensive one is not worth the price. Both of those takes are missing something. The more interesting question is not which product…