VRH HQ 4 Multi Action Pigment Defence Therapy Skin Lightening Serum is a clinically advanced night-time treatment designed to reduce melasma, hyperpigmentation, and uneven skin tone. Enriched with HQ-4 complex, including Mequinol, Morus Alba Extract, Glycyrrhiza Glabra Extract, and Retinyl Palmitate, it works by inhibiting melanin synthesis and tyrosinase activity. The serum also supports collagen synthesis and skin renewal, offering a smoother, more radiant appearance within weeks of consistent use.