Kojic acid can inhibit the synthesis of tyrosinase, it can strongly inhibit the formation of melanin in the skin. Dark skin body whitening powder. Safe and non-toxic, and will not produce sequelae of white spots. Hi! My way. You can add all Kojic Acid powder. after the melted powder, you can divide kojic acid into any cream, lotion, toner, serum, or oil. about 2 to 3 tables spoon full each. Mix well. and put on your skin body at least 2 times per day. If you want to whiten the Whole body you can do it too but the darkest place is first to start. If spots start getting lighter then go to Evrywear on your skin. That will make even tone skin. It depends on your skin color. if your skin is black or dark, takes longer to get whiter skin than lite-colored skin. DIY, everyone does mix differently. Try your way. Thank you. *Mix with Serum Body Oil Cream Lotion Toner Many Other Cosmetics Products. *140ml of your cosmetic with 1 teaspoon of Kojic acid powder. *Mix well and every time shake well before use. USPS 1st class Free shipping. Ship within 1 Business day. Thank you for looking at Mitsi's store. Take care.