iS Clinical Brightening Serum is a hydroquinone-free brightening serum that targets hyperpigmentation, dark spots and uneven skin tone with a potent botanical blend. Alpha arbutin, bilberry and sugarcane AHAs provide controlled exfoliation without peeling, smoothing texture and refining the look of pores for clearer, glass-like skin. Norwegian kelp and mushroom extracts visibly illuminate and even out discoloration while soothing butylene glycol and glycerin keep skin comfortably hydrated. This lightweight, fast-absorbing formula layers easily under skincare, delivering rapid and long-term radiance-boosting results for a brighter, more youthful-looking complexion.