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GUANJING Retinol & Nicotinamide Facial Serum is a powerful skincare solution designed to brighten skin tone, reduce signs of aging, and deeply hydrate the skin. Ideal for dull, uneven, or mature skin, this serum helps restore a youthful glow and smooth texture. Key Ingredients: Retinol (Vitamin A): Boosts skin cell turnover, reduces fine lines and wrinkles, and improves skin elasticity. Niacinamide (Vitamin B3): Brightens the skin, reduces pigmentation, refines pores, and helps improve skin barrier function. Vitamin E: Provides antioxidant protection and keeps the skin hydrated and nourished.