HAKU Melanofocus IV (Quasi-drug) Medicated Whitening Serum 45g Thoroughly researched the root causes of blemishes. Anticipates and addresses "stubborn blemishes." Prevents their formation and spread. Two whitening active ingredients (4MSK*, m-tranexamic acid**) effectively target the root causes of blemishes, suppressing melanin production and preventing spots and freckles. The active ingredient dipotassium glycyrrhizate suppresses inflammation and prevents skin irritation. *4-methoxysalicylic acid potassium salt **tranexamic acid