HAKU Beauty Serum IV Main Unit Item Description Whitening serum that suppresses melanin production and prevents spots and freckles Thoroughly researched the root causes of spot formation. Anticipates "stubborn spots." Prevents their formation and spread. Two whitening active ingredients (4MSK*, m-tranexamic acid**) that effectively target the root causes of spots suppress melanin production and prevent spots and freckles. The active ingredient dipotassium glycyrrhizate suppresses inflammation and prevents skin irritation. *4-Methoxysalicylic acid potassium salt **Tranexamic acid