{"product_id":"cosrx-the-vitamin-c-23-serum-20ml","title":"COSRX The Vitamin C 23 Serum 20ml","description":"\u003cdiv class=\"brand-quick-answer\" style=\"background:#f8f4ff;border-left:4px solid #967bb6;padding:16px 20px;margin:0 0 24px;border-radius:0 8px 8px 0\"\u003e\n\u003cp\u003e\u003cstrong\u003eCOSRX The Vitamin C 23 Serum is available in Pakistan\u003c\/strong\u003e at Korean Skincare Pakistan, shipped directly from Seoul, South Korea in 5–7 business days with Cash on Delivery across Lahore, Karachi, Islamabad, Rawalpindi, Multan, Faisalabad, and Peshawar.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003ch2\u003eWhat is COSRX The Vitamin C 23 Serum?\u003c\/h2\u003e\n\u003cp\u003eThe COSRX The Vitamin C 23 Serum is a high-potency brightening serum containing 23% pure L-Ascorbic Acid (Vitamin C) — the gold standard form of vitamin C with the most clinical evidence for skin brightening, photoaging reversal, and antioxidant protection. At 23%, this serum delivers maximum efficacy for hyperpigmentation, UV-induced dark spots, dullness, and environmental oxidative damage. For Pakistani skin exposed to intense solar radiation and urban pollution, a well-formulated pure vitamin C serum is one of the most impactful anti-aging investments available.\u003c\/p\u003e\n\u003ch2\u003eKey Ingredients \u0026amp; Benefits\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003e23% L-Ascorbic Acid (Pure Vitamin C)\u003c\/strong\u003e is the most bioactive form of vitamin C for skin. At this concentration, it works through three synergistic mechanisms: (1) \u003cstrong\u003eAntioxidant protection\u003c\/strong\u003e — neutralises UV-generated free radicals that degrade collagen and cause pigmentation. Pakistan's UV index regularly reaches 10+ in summer, making antioxidant protection critical. (2) \u003cstrong\u003eTyrosinase inhibition\u003c\/strong\u003e — blocks the enzyme responsible for melanin synthesis, directly addressing hyperpigmentation at the source. Clinical studies show L-ascorbic acid at 20%+ produces significant lightening of UV-induced dark spots within 12 weeks. (3) \u003cstrong\u003eCollagen synthesis stimulation\u003c\/strong\u003e — vitamin C is an essential cofactor for prolyl and lysyl hydroxylase enzymes that produce stable, cross-linked collagen, reversing photoaging-associated collagen loss.\u003c\/p\u003e\u003cp\u003eThe serum uses a \u003cstrong\u003ewaterless base\u003c\/strong\u003e to enhance L-ascorbic acid stability — pure vitamin C degrades rapidly in water-based formulas, turning yellow\/orange. The thicker, non-watery texture of this serum preserves potency. \u003cstrong\u003eVitamin E (Tocopherol)\u003c\/strong\u003e acts synergistically with vitamin C: they regenerate each other's antioxidant capacity, multiplying the photoprotective effect. \u003cstrong\u003eHyaluronic Acid\u003c\/strong\u003e ensures the anhydrous formula doesn't dehydrate skin despite the high-potency active load.\u003c\/p\u003e\n\u003ch2\u003eSkin Concerns This Addresses\u003c\/h2\u003e\n\u003ctable style=\"width:100%;border-collapse:collapse\"\u003e\n\u003cthead\u003e\u003ctr style=\"background:#f0f0f0\"\u003e\n\u003cth style=\"padding:8px;border:1px solid #ddd;text-align:left\"\u003eSkin Concern\u003c\/th\u003e\n\u003cth style=\"padding:8px;border:1px solid #ddd;text-align:left\"\u003eHow It Helps\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:8px;border:1px solid #ddd\"\u003ePIH and dark spots from Pakistani sun exposure\u003c\/td\u003e\n\u003ctd style=\"padding:8px;border:1px solid #ddd\"\u003e23% L-Ascorbic Acid inhibits tyrosinase for maximum melanin suppression and dark spot fading\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:8px;border:1px solid #ddd\"\u003ePhotoaging and collagen loss\u003c\/td\u003e\n\u003ctd style=\"padding:8px;border:1px solid #ddd\"\u003eVitamin C stimulates collagen synthesis and neutralises the UV free radicals that degrade existing collagen\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:8px;border:1px solid #ddd\"\u003eDull, oxidised complexion from pollution\u003c\/td\u003e\n\u003ctd style=\"padding:8px;border:1px solid #ddd\"\u003eHigh-potency antioxidant protection neutralises daily pollution-induced oxidative damage\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch2\u003eHow to Use COSRX The Vitamin C 23 Serum\u003c\/h2\u003e\n\u003cp\u003eApply 2–3 drops to clean, dry skin in the MORNING only (vitamin C is most effective as morning UV protection). Allow 30 seconds for partial absorption, then layer over SPF. The 23% concentration may cause a mild tingling or warmth for 2–5 minutes — this is normal. Beginners should start with every other day for 2 weeks before daily use. If the serum turns brown\/orange-brown, it has oxidised and lost efficacy — discard. Store in a cool, dark place and use within 3 months of opening.\u003c\/p\u003e\n\u003ch2\u003eCOSRX The Vitamin C 23 Serum in Your Korean Skincare Routine\u003c\/h2\u003e\n\u003cp\u003eUse exclusively in your AM routine — vitamin C at this strength works as morning UV protection and antioxidant shield, and is photostable enough to be applied under SPF (it enhances rather than conflicts with sunscreen). Apply after toning, before moisturiser and SPF. Do NOT use this in PM — pair with hydrating and repair products at night instead. For maximum daily brightening, the morning routine: Low pH Cleanser → Centella Toner → Vitamin C 23 Serum → HA Cream → SPF 50+.\u003c\/p\u003e\n\u003ch2\u003eWhy Buy COSRX from Korean Skincare Pakistan?\u003c\/h2\u003e\n\u003cp\u003eKorean Skincare Pakistan sources directly from COSRX's official Korean distributors and ships door-to-door from Seoul in 5–7 business days. Every product is 100% authentic with Cash on Delivery available in Lahore, Karachi, Islamabad, Rawalpindi, Multan, Faisalabad, Peshawar, and all major Pakistani cities.\u003c\/p\u003e\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003ch3\u003eIs COSRX The Vitamin C 23 Serum available in Pakistan?\u003c\/h3\u003e\n\u003cp\u003eYes — COSRX The Vitamin C 23 Serum is available in Pakistan exclusively at Korean Skincare Pakistan. We import directly from Seoul with Cash on Delivery nationwide.\u003c\/p\u003e\n\u003ch3\u003eWhat is the COSRX The Vitamin C 23 Serum price in Pakistan?\u003c\/h3\u003e\n\u003cp\u003eCOSRX The Vitamin C 23 Serum is available at PKR 6,780 at Korean Skincare Pakistan, shipped directly from Seoul, South Korea.\u003c\/p\u003e\n\u003ch3\u003eIs 23% vitamin C too strong for Pakistani skin?\u003c\/h3\u003e\n\u003cp\u003eIt is the highest standard concentration available and can cause initial tingling. Start every other day, then increase to daily. Those with sensitive or reactive skin should first try a 10–15% vitamin C product and only step up to 23% after 4–6 weeks of acclimatisation.\u003c\/p\u003e\n\u003ch3\u003eDoes COSRX Vitamin C 23 Serum work for brown skin and South Asian hyperpigmentation?\u003c\/h3\u003e\n\u003cp\u003eYes — and it is particularly effective. L-Ascorbic Acid at 23% is the strongest standard tyrosinase inhibitor available over the counter. Clinical studies on Asian and South Asian skin types show significant lightening of sun-induced hyperpigmentation within 8–12 weeks.\u003c\/p\u003e\n\u003ch3\u003eHow should I store COSRX Vitamin C 23 Serum in Pakistan's hot climate?\u003c\/h3\u003e\n\u003cp\u003eStore in a cool, dark location — ideally in your refrigerator or in the coolest room of your home. Pakistan's summer temperatures accelerate vitamin C oxidation. Use within 3 months of opening. If it turns brown, it has oxidised and should be replaced.\u003c\/p\u003e\n\u003cscript type=\"application\/ld+json\"\u003e\n{\"@context\":\"https:\/\/schema.org\",\"@type\":\"FAQPage\",\"mainEntity\":[\n{\"@type\":\"Question\",\"name\":\"Is COSRX The Vitamin C 23 Serum available in Pakistan?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Yes, COSRX The Vitamin C 23 Serum is available in Pakistan at Korean Skincare Pakistan, shipped from Seoul with Cash on Delivery.\"}},\n{\"@type\":\"Question\",\"name\":\"What is the COSRX The Vitamin C 23 Serum price in Pakistan?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"COSRX The Vitamin C 23 Serum is priced at PKR 6,780 at Korean Skincare Pakistan.\"}},\n{\"@type\":\"Question\",\"name\":\"Is 23% vitamin C too strong for Pakistani skin?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"It is the highest standard concentration available and can cause initial tingling. Start every other day, then increase to daily. Those with sensitive or reactive skin should first try a 10–15% vitamin C product and only step up to 23% after 4–6 weeks of acclimatisation.\"}},\n{\"@type\":\"Question\",\"name\":\"Does COSRX Vitamin C 23 Serum work for brown skin and South Asian hyperpigmentation?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Yes — and it is particularly effective. L-Ascorbic Acid at 23% is the strongest standard tyrosinase inhibitor available over the counter. Clinical studies on Asian and South Asian skin types show significant lightening of sun-induced hyperpigmentation within 8–12 weeks.\"}},\n{\"@type\":\"Question\",\"name\":\"How should I store COSRX Vitamin C 23 Serum in Pakistan's hot climate?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Store in a cool, dark location — ideally in your refrigerator or in the coolest room of your home. Pakistan's summer temperatures accelerate vitamin C oxidation. Use within 3 months of opening. If it turns brown, it has oxidised and should be replaced.\"}}\n]}\n\u003c\/script\u003e","brand":"COSRX","offers":[{"title":"20ml","offer_id":40714313793613,"sku":"AR-000087","price":6780.0,"currency_code":"PKR","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0585\/4986\/2477\/files\/cosrx-the-vitamin-c-23-serum-20ml-100-authentic-korean-skincare-in-pakistan-720161.jpg?v=1748471813","url":"https:\/\/korean-skincare.pk\/products\/cosrx-the-vitamin-c-23-serum-20ml","provider":"KOREAN SKINCARE PAKISTAN ","version":"1.0","type":"link"}