COSRX The Vitamin C 23 Serum 23% Pure Vitamin‑C Serum Glutathione Super‑Vitamin‑E Fade Dark Spot Antioxidant Brightening Facial Serum 20ml

COSRX The Vitamin C 23 Serum is high‑strength Korean brightening serum with 23% pure L‑Ascorbic Acid, designed for users who have built tolerance to vitamin‑C active ingredients.High‑dose pure vitamin‑C inhibits melanin production, fades dark spots, PIH post‑acne hyperpigmentation, improve dull sallow complexion. Meanwhile stimulates collagen synthesis to smooth fine lines and enhance skin elasticity. Super‑vitamin‑E tocotrienol and glutathione form multi‑antioxidant system, neutralize free‑radical damage and stabilize vitamin‑C performance. Sodium hyaluronate, panthenol and allantoin bring hydration and soothing comfort to offset potential irritation from high‑concentration vitamin‑C.Special dual‑layer oil‑serum structure, shake bottle thoroughly before every use to fully mix oil and serum layers. Yellowish serum texture, absorbs smoothly, delivers supple radiant finish. Dark‑colored dropper bottle helps slow oxidation. Important notes: best for morning routine; strict daily sunscreen application is non‑negotiable. Start with low frequency for skin adaptation, not suitable for vitamin‑C beginnersCOSRX。✨Key Benefits✅23% Pure L‑Ascorbic Acid: High‑potency brightening, fade dark spots & post‑acne marks, inhibit melanin, boost collagen✅Tocotrienol Super Vitamin‑E + Glutathione: Multi‑antioxidant protection, stabilise vitamin‑C activity✅Sodium Hyaluronate + Panthenol + Allantoin: Hydrate skin, soothe and reduce active‑related irritation✅Dual‑Layer Oil‑Serum Formula: Shake well before use, fast‑absorbing, supple radiant skin finish✅Dark Amber Dropper Bottle: Reduce oxidation, preserve serum potency✅Skin Compatibility: Suitable for vitamin‑C‑tolerant normal, combination, oily skin troubled by dullness, dark spots, hyperpigmentation, fine lines🧴How To UseShake bottle vigorously 1‑2 times before every use to mix dual‑layer formulaAfter cleansing & toner step, take 2‑3 drops onto fingertipsGently pat over face and neck, avoid eye and lip areaFollow with moisturizerRecommend for morning routine; build tolerance: start 2‑3 times per week, gradually increase frequencyMust apply broad‑spectrum sunscreen every single dayPatch‑test on small skin area before first‑time application📌Product Spec‑ Brand: COSRX‑ Product: The Vitamin C 23 Serum‑ Volume: 20ml‑ Shelf life: 3 years；use within 2 months after opening, better stored in cool place / refrigerator‑ Suitable for: Vitamin‑C tolerant skin, dull sallow tone, dark spots, post‑acne hyperpigmentation, fine lines, loss of elasticity‑ Not suitable for: Vitamin‑C beginners, broken inflamed wounded skin, extremely sensitive reactive skin‑ Feature: 23% pure L‑Ascorbic Acid dual‑layer brightening serum, super‑vitamin‑E glutathione antioxidant, fade dark‑spot hyperpigmentation, collagen‑boost facial serum