{"product_id":"cosrx-the-vitamin-c-13-serum-20ml","title":"Cosrx The Vitamin C 13 Serum 20 ml","description":"\u003cp class=\"FirstParagraph\"\u003e\u003cb\u003eCOSRX The Vitamin C 13 Serum 20 ml\u003c\/b\u003e is a lightweight, beginner-friendly Korean vitamin C serum that restores radiance to dull, uneven, or post-acne-marked skin. It combines \u003cb\u003e13% Pure L-Ascorbic Acid\u003c\/b\u003e with \u003cb\u003e3-O-Ethyl Ascorbic Acid\u003c\/b\u003e in a \u003cb\u003eDual Vitamin C System\u003c\/b\u003e, alongside antioxidant-rich \u003cb\u003eVitamin E (Tocopherol \u0026amp; Tocotrienols)\u003c\/b\u003e, \u003cb\u003eGlutathione\u003c\/b\u003e, \u003cb\u003eSodium Hyaluronate\u003c\/b\u003e, \u003cb\u003ePanthenol\u003c\/b\u003e, and \u003cb\u003eAllantoin\u003c\/b\u003e to brighten skin while keeping it hydrated and comfortable.\u003c\/p\u003e\n\u003cp class=\"MsoBodyText\"\u003eUnlike heavier oil-based vitamin C formulas, this water-based serum absorbs quickly without feeling sticky, making it suitable for everyday morning and evening use. Whether your goal is fading dark spots, improving uneven skin tone, or adding radiance to tired-looking skin, its moderate 13% concentration offers an easier introduction than higher-strength (e.g., 23%) vitamin C formulas.\u003c\/p\u003e\n\u003ch2\u003e\n\u003ca name=\"key-benefits\"\u003e\u003c\/a\u003eKey Benefits\u003c\/h2\u003e\n\u003cp class=\"Compact\" style=\"margin-left: .5in; text-indent: -24.0pt; mso-list: l0 level1 lfo1;\"\u003e\u003cspan style=\"mso-bookmark: key-benefits;\"\u003e\u003c!-- [if !supportLists]--\u003e\u003cspan style=\"mso-bidi-font-family: Cambria; mso-bidi-theme-font: minor-latin;\"\u003e\u003cspan style=\"mso-list: Ignore;\"\u003e•\u003cspan style=\"font: 7.0pt 'Times New Roman';\"\u003e           \u003c\/span\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c!--[endif]--\u003e\u003cb\u003eBrightens dull skin\u003c\/b\u003e – restores natural radiance for a healthier-looking complexion\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"Compact\" style=\"margin-left: .5in; text-indent: -24.0pt; mso-list: l0 level1 lfo1;\"\u003e\u003cspan style=\"mso-bookmark: key-benefits;\"\u003e\u003c!-- [if !supportLists]--\u003e\u003cspan style=\"mso-bidi-font-family: Cambria; mso-bidi-theme-font: minor-latin;\"\u003e\u003cspan style=\"mso-list: Ignore;\"\u003e•\u003cspan style=\"font: 7.0pt 'Times New Roman';\"\u003e           \u003c\/span\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c!--[endif]--\u003e\u003cb\u003eFades dark spots\u003c\/b\u003e – 13% Pure Vitamin C improves post-acne pigmentation and uneven tone\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"Compact\" style=\"margin-left: .5in; text-indent: -24.0pt; mso-list: l0 level1 lfo1;\"\u003e\u003cspan style=\"mso-bookmark: key-benefits;\"\u003e\u003c!-- [if !supportLists]--\u003e\u003cspan style=\"mso-bidi-font-family: Cambria; mso-bidi-theme-font: minor-latin;\"\u003e\u003cspan style=\"mso-list: Ignore;\"\u003e•\u003cspan style=\"font: 7.0pt 'Times New Roman';\"\u003e           \u003c\/span\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c!--[endif]--\u003e\u003cb\u003eAntioxidant protection\u003c\/b\u003e – neutralizes free radicals from UV exposure and pollution\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"Compact\" style=\"margin-left: .5in; text-indent: -24.0pt; mso-list: l0 level1 lfo1;\"\u003e\u003cspan style=\"mso-bookmark: key-benefits;\"\u003e\u003c!-- [if !supportLists]--\u003e\u003cspan style=\"mso-bidi-font-family: Cambria; mso-bidi-theme-font: minor-latin;\"\u003e\u003cspan style=\"mso-list: Ignore;\"\u003e•\u003cspan style=\"font: 7.0pt 'Times New Roman';\"\u003e           \u003c\/span\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c!--[endif]--\u003e\u003cb\u003eImproves texture and clarity\u003c\/b\u003e – smooths rough-looking skin for a refined complexion\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"Compact\" style=\"margin-left: .5in; text-indent: -24.0pt; mso-list: l0 level1 lfo1;\"\u003e\u003cspan style=\"mso-bookmark: key-benefits;\"\u003e\u003c!-- [if !supportLists]--\u003e\u003cspan style=\"mso-bidi-font-family: Cambria; mso-bidi-theme-font: minor-latin;\"\u003e\u003cspan style=\"mso-list: Ignore;\"\u003e•\u003cspan style=\"font: 7.0pt 'Times New Roman';\"\u003e           \u003c\/span\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c!--[endif]--\u003e\u003cb\u003eHydrates while brightening\u003c\/b\u003e – Sodium Hyaluronate, Panthenol, and Squalane prevent dryness\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"Compact\" style=\"margin-left: .5in; text-indent: -24.0pt; mso-list: l0 level1 lfo1;\"\u003e\u003cspan style=\"mso-bookmark: key-benefits;\"\u003e\u003c!-- [if !supportLists]--\u003e\u003cspan style=\"mso-bidi-font-family: Cambria; mso-bidi-theme-font: minor-latin;\"\u003e\u003cspan style=\"mso-list: Ignore;\"\u003e•\u003cspan style=\"font: 7.0pt 'Times New Roman';\"\u003e           \u003c\/span\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c!--[endif]--\u003e\u003cb\u003eBeginner-friendly formula\u003c\/b\u003e – moderate concentration, lightweight, non-sticky, fast-absorbing\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"Compact\" style=\"margin-left: .5in; text-indent: -24.0pt; mso-list: l0 level1 lfo1;\"\u003e\u003cspan style=\"mso-bookmark: key-benefits;\"\u003e\u003c!-- [if !supportLists]--\u003e\u003cspan style=\"mso-bidi-font-family: Cambria; mso-bidi-theme-font: minor-latin;\"\u003e\u003cspan style=\"mso-list: Ignore;\"\u003e•\u003cspan style=\"font: 7.0pt 'Times New Roman';\"\u003e           \u003c\/span\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c!--[endif]--\u003e\u003cb\u003eSupports early anti-aging care\u003c\/b\u003e – helps reduce fine lines from environmental stress\u003c\/span\u003e\u003c\/p\u003e\n\u003ch2\u003e\n\u003ca name=\"key-ingredients\"\u003e\u003c\/a\u003eKey Ingredients\u003c\/h2\u003e\n\u003cp class=\"FirstParagraph\"\u003e\u003cspan style=\"mso-bookmark: key-ingredients;\"\u003e\u003cb\u003e13% Pure L-Ascorbic Acid\u003c\/b\u003e, the most researched form of Vitamin C, brightens dull skin, improves dark spots and post-acne marks, supports collagen production, and protects against environmental free radicals. \u003cb\u003e3-O-Ethyl Ascorbic Acid\u003c\/b\u003e, a stable Vitamin C derivative, complements it for additional antioxidant support. \u003cb\u003eGlutathione\u003c\/b\u003e, \u003cb\u003eTocotrienols\u003c\/b\u003e, and \u003cb\u003eTocopherol (Vitamin E)\u003c\/b\u003e further defend against environmental stress.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"MsoBodyText\"\u003e\u003cspan style=\"mso-bookmark: key-ingredients;\"\u003e\u003cb\u003eSodium Hyaluronate\u003c\/b\u003e attracts and retains moisture, while \u003cb\u003ePanthenol\u003c\/b\u003e and \u003cb\u003eAllantoin\u003c\/b\u003e soothe skin and support the barrier. \u003cb\u003eSqualane\u003c\/b\u003e, \u003cb\u003eNiacinamide\u003c\/b\u003e, \u003cb\u003eAcetyl Glucosamine (NAG)\u003c\/b\u003e, \u003cb\u003eLicorice Root Extract\u003c\/b\u003e, \u003cb\u003eCaffeine\u003c\/b\u003e, and \u003cb\u003eAdenosine\u003c\/b\u003e round out this hydrating, brightening formula.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"MsoBodyText\"\u003e\u003cspan style=\"mso-bookmark: key-ingredients;\"\u003e\u003ci\u003eNote: Ingredient lists may be updated by the manufacturer — always check packaging for current INCI details.\u003c\/i\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003ch2\u003e\n\u003ca name=\"product-specifications\"\u003e\u003c\/a\u003eProduct Specifications\u003c\/h2\u003e\n\u003ctable class=\"Table\" border=\"0\" cellspacing=\"0\" cellpadding=\"0\" width=\"100%\" style=\"width: 100.0%; border-collapse: collapse; mso-yfti-tbllook: 32; mso-padding-alt: 0in 5.4pt 0in 5.4pt;\"\u003e\n\u003cthead\u003e\n\u003ctr style=\"mso-yfti-irow: -1; mso-yfti-firstrow: yes; mso-yfti-lastfirstrow: yes;\"\u003e\n\u003ctd valign=\"bottom\" style=\"border: none; border-bottom: solid windowtext 1.0pt; mso-border-bottom-alt: solid windowtext .25pt; padding: 0in 5.4pt 0in 5.4pt;\"\u003e\n\u003cp class=\"Compact\" style=\"mso-yfti-cnfc: 1;\"\u003e\u003cspan style=\"mso-bookmark: product-specifications;\"\u003eSpecification\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd valign=\"bottom\" style=\"border: none; border-bottom: solid windowtext 1.0pt; mso-border-bottom-alt: solid windowtext .25pt; padding: 0in 5.4pt 0in 5.4pt;\"\u003e\n\u003cp class=\"Compact\" style=\"mso-yfti-cnfc: 1;\"\u003e\u003cspan style=\"mso-bookmark: product-specifications;\"\u003eDetails\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr style=\"mso-yfti-irow: 0;\"\u003e\n\u003ctd valign=\"top\" style=\"padding: 0in 5.4pt 0in 5.4pt;\"\u003e\n\u003cp class=\"Compact\"\u003e\u003cspan style=\"mso-bookmark: product-specifications;\"\u003eProduct Name\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd valign=\"top\" style=\"padding: 0in 5.4pt 0in 5.4pt;\"\u003e\n\u003cp class=\"Compact\"\u003e\u003cspan style=\"mso-bookmark: product-specifications;\"\u003eCOSRX The Vitamin C 13 Serum 20 ml\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"mso-yfti-irow: 1;\"\u003e\n\u003ctd valign=\"top\" style=\"padding: 0in 5.4pt 0in 5.4pt;\"\u003e\n\u003cp class=\"Compact\"\u003e\u003cspan style=\"mso-bookmark: product-specifications;\"\u003eBrand\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd valign=\"top\" style=\"padding: 0in 5.4pt 0in 5.4pt;\"\u003e\n\u003cp class=\"Compact\"\u003e\u003cspan style=\"mso-bookmark: product-specifications;\"\u003eCOSRX\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"mso-yfti-irow: 2;\"\u003e\n\u003ctd valign=\"top\" style=\"padding: 0in 5.4pt 0in 5.4pt;\"\u003e\n\u003cp class=\"Compact\"\u003e\u003cspan style=\"mso-bookmark: product-specifications;\"\u003eCategory\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd valign=\"top\" style=\"padding: 0in 5.4pt 0in 5.4pt;\"\u003e\n\u003cp class=\"Compact\"\u003e\u003cspan style=\"mso-bookmark: product-specifications;\"\u003eFacial Vitamin C Serum\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"mso-yfti-irow: 3;\"\u003e\n\u003ctd valign=\"top\" style=\"padding: 0in 5.4pt 0in 5.4pt;\"\u003e\n\u003cp class=\"Compact\"\u003e\u003cspan style=\"mso-bookmark: product-specifications;\"\u003eProduct Type\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd valign=\"top\" style=\"padding: 0in 5.4pt 0in 5.4pt;\"\u003e\n\u003cp class=\"Compact\"\u003e\u003cspan style=\"mso-bookmark: product-specifications;\"\u003eBrightening \u0026amp; Antioxidant Serum\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"mso-yfti-irow: 4;\"\u003e\n\u003ctd valign=\"top\" style=\"padding: 0in 5.4pt 0in 5.4pt;\"\u003e\n\u003cp class=\"Compact\"\u003e\u003cspan style=\"mso-bookmark: product-specifications;\"\u003eHero Ingredients\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd valign=\"top\" style=\"padding: 0in 5.4pt 0in 5.4pt;\"\u003e\n\u003cp class=\"Compact\"\u003e\u003cspan style=\"mso-bookmark: product-specifications;\"\u003e13% L-Ascorbic Acid, 3-O-Ethyl Ascorbic Acid\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"mso-yfti-irow: 5;\"\u003e\n\u003ctd valign=\"top\" style=\"padding: 0in 5.4pt 0in 5.4pt;\"\u003e\n\u003cp class=\"Compact\"\u003e\u003cspan style=\"mso-bookmark: product-specifications;\"\u003eSupporting Ingredients\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd valign=\"top\" style=\"padding: 0in 5.4pt 0in 5.4pt;\"\u003e\n\u003cp class=\"Compact\"\u003e\u003cspan style=\"mso-bookmark: product-specifications;\"\u003eGlutathione, Tocotrienols, Vitamin E, Sodium Hyaluronate, Panthenol, Allantoin, Squalane, NAG, Niacinamide\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"mso-yfti-irow: 6;\"\u003e\n\u003ctd valign=\"top\" style=\"padding: 0in 5.4pt 0in 5.4pt;\"\u003e\n\u003cp class=\"Compact\"\u003e\u003cspan style=\"mso-bookmark: product-specifications;\"\u003eTechnology\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd valign=\"top\" style=\"padding: 0in 5.4pt 0in 5.4pt;\"\u003e\n\u003cp class=\"Compact\"\u003e\u003cspan style=\"mso-bookmark: product-specifications;\"\u003eDual Vitamin C System, Antioxidant Complex, Water-Based Formula\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"mso-yfti-irow: 7;\"\u003e\n\u003ctd valign=\"top\" style=\"padding: 0in 5.4pt 0in 5.4pt;\"\u003e\n\u003cp class=\"Compact\"\u003e\u003cspan style=\"mso-bookmark: product-specifications;\"\u003eSkin Types\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd valign=\"top\" style=\"padding: 0in 5.4pt 0in 5.4pt;\"\u003e\n\u003cp class=\"Compact\"\u003e\u003cspan style=\"mso-bookmark: product-specifications;\"\u003eNormal, Combination, Oily, Dry, Dull Skin\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"mso-yfti-irow: 8;\"\u003e\n\u003ctd valign=\"top\" style=\"padding: 0in 5.4pt 0in 5.4pt;\"\u003e\n\u003cp class=\"Compact\"\u003e\u003cspan style=\"mso-bookmark: product-specifications;\"\u003eSkin Concerns\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd valign=\"top\" style=\"padding: 0in 5.4pt 0in 5.4pt;\"\u003e\n\u003cp class=\"Compact\"\u003e\u003cspan style=\"mso-bookmark: product-specifications;\"\u003eDark Spots, Hyperpigmentation, Post-Acne Marks, Uneven Skin Tone, Dullness, Rough Texture\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"mso-yfti-irow: 9;\"\u003e\n\u003ctd valign=\"top\" style=\"padding: 0in 5.4pt 0in 5.4pt;\"\u003e\n\u003cp class=\"Compact\"\u003e\u003cspan style=\"mso-bookmark: product-specifications;\"\u003eTexture \/ Finish\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd valign=\"top\" style=\"padding: 0in 5.4pt 0in 5.4pt;\"\u003e\n\u003cp class=\"Compact\"\u003e\u003cspan style=\"mso-bookmark: product-specifications;\"\u003eLightweight Water-Based Serum, Fast-Absorbing, Non-Sticky\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"mso-yfti-irow: 10;\"\u003e\n\u003ctd valign=\"top\" style=\"padding: 0in 5.4pt 0in 5.4pt;\"\u003e\n\u003cp class=\"Compact\"\u003e\u003cspan style=\"mso-bookmark: product-specifications;\"\u003eVolume\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd valign=\"top\" style=\"padding: 0in 5.4pt 0in 5.4pt;\"\u003e\n\u003cp class=\"Compact\"\u003e\u003cspan style=\"mso-bookmark: product-specifications;\"\u003e20 ml\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"mso-yfti-irow: 11;\"\u003e\n\u003ctd valign=\"top\" style=\"padding: 0in 5.4pt 0in 5.4pt;\"\u003e\n\u003cp class=\"Compact\"\u003e\u003cspan style=\"mso-bookmark: product-specifications;\"\u003eCountry of Origin\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd valign=\"top\" style=\"padding: 0in 5.4pt 0in 5.4pt;\"\u003e\n\u003cp class=\"Compact\"\u003e\u003cspan style=\"mso-bookmark: product-specifications;\"\u003eSouth Korea\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"mso-yfti-irow: 12;\"\u003e\n\u003ctd valign=\"top\" style=\"padding: 0in 5.4pt 0in 5.4pt;\"\u003e\n\u003cp class=\"Compact\"\u003e\u003cspan style=\"mso-bookmark: product-specifications;\"\u003eRoutine Step\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd valign=\"top\" style=\"padding: 0in 5.4pt 0in 5.4pt;\"\u003e\n\u003cp class=\"Compact\"\u003e\u003cspan style=\"mso-bookmark: product-specifications;\"\u003eAfter Toner, Before Moisturizer\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"mso-yfti-irow: 13;\"\u003e\n\u003ctd valign=\"top\" style=\"padding: 0in 5.4pt 0in 5.4pt;\"\u003e\n\u003cp class=\"Compact\"\u003e\u003cspan style=\"mso-bookmark: product-specifications;\"\u003eRecommended Use\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd valign=\"top\" style=\"padding: 0in 5.4pt 0in 5.4pt;\"\u003e\n\u003cp class=\"Compact\"\u003e\u003cspan style=\"mso-bookmark: product-specifications;\"\u003eMorning and\/or Evening\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"mso-yfti-irow: 14; mso-yfti-lastrow: yes;\"\u003e\n\u003ctd valign=\"top\" style=\"padding: 0in 5.4pt 0in 5.4pt;\"\u003e\n\u003cp class=\"Compact\"\u003e\u003cspan style=\"mso-bookmark: product-specifications;\"\u003eStorage\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd valign=\"top\" style=\"padding: 0in 5.4pt 0in 5.4pt;\"\u003e\n\u003cp class=\"Compact\"\u003e\u003cspan style=\"mso-bookmark: product-specifications;\"\u003eRefrigerate at 3–10°C after opening; store upright, away from sunlight; use within 2 months of opening\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch2\u003e\n\u003ca name=\"skin-type-suitability\"\u003e\u003c\/a\u003eSkin Type Suitability\u003c\/h2\u003e\n\u003cp class=\"FirstParagraph\"\u003e\u003cspan style=\"mso-bookmark: skin-type-suitability;\"\u003eSuits \u003cb\u003enormal\u003c\/b\u003e, \u003cb\u003ecombination\u003c\/b\u003e, and \u003cb\u003eoily skin\u003c\/b\u003e thanks to its lightweight, water-based, non-greasy formula, while hydrating ingredients help \u003cb\u003edry\u003c\/b\u003e and \u003cb\u003edull skin\u003c\/b\u003e replenish moisture while brightening. Its moderate 13% concentration makes it a solid choice for \u003cb\u003eVitamin C beginners\u003c\/b\u003e. Those with very sensitive skin, a compromised barrier, or using prescription actives should introduce it gradually; discontinue and consult a professional if irritation persists.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch2\u003e\n\u003ca name=\"how-to-use\"\u003e\u003c\/a\u003eHow To Use\u003c\/h2\u003e\n\u003cp class=\"FirstParagraph\"\u003e\u003cspan style=\"mso-bookmark: how-to-use;\"\u003eAfter cleansing and toner, apply \u003cb\u003e2–3 drops\u003c\/b\u003e and pat gently over the face and neck until absorbed, then follow with moisturizer and, in the morning, \u003cb\u003ebroad-spectrum sunscreen (SPF 30+)\u003c\/b\u003e. Beginners should start \u003cb\u003e2–3 mornings\/week\u003c\/b\u003e, increasing gradually; regular users can apply once daily. Refrigerate after opening and use within 2 months.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch2\u003e\n\u003ca name=\"authenticity-trust\"\u003e\u003c\/a\u003eAuthenticity\u003c\/h2\u003e\n\u003cp class=\"FirstParagraph\"\u003e\u003cspan style=\"mso-bookmark: authenticity-trust;\"\u003e\u003cb\u003eCOSRX\u003c\/b\u003e is a globally respected Korean skincare brand known for evidence-based formulations over exaggerated claims. To ensure authenticity, buy from an authorized retailer specializing in genuine Korean skincare, and check for the official COSRX logo, batch number, and expiry date.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch2\u003e\n\u003ca name=\"frequently-asked-questions\"\u003e\u003c\/a\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003cp class=\"FirstParagraph\"\u003e\u003cspan style=\"mso-bookmark: frequently-asked-questions;\"\u003e\u003cb\u003e1. What is this serum for?\u003c\/b\u003e A Korean Vitamin C serum with 13% Pure L-Ascorbic Acid, 3-O-Ethyl Ascorbic Acid, and antioxidants that brightens dull skin, fades dark spots and post-acne marks, and evens skin tone.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"MsoBodyText\"\u003e\u003cspan style=\"mso-bookmark: frequently-asked-questions;\"\u003e\u003cb\u003e2. Is it suitable for beginners?\u003c\/b\u003e Yes — compared with 23% Vitamin C formulas, the 13% concentration is gentler; start 2–3 mornings\/week and increase gradually.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"MsoBodyText\"\u003e\u003cspan style=\"mso-bookmark: frequently-asked-questions;\"\u003e\u003cb\u003e3. Can it help fade dark spots and acne marks?\u003c\/b\u003e Yes — Vitamin C, Glutathione, Niacinamide, and Licorice Root Extract together improve dark spots and uneven tone with consistent use and daily sunscreen.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"MsoBodyText\"\u003e\u003cspan style=\"mso-bookmark: frequently-asked-questions;\"\u003e\u003cb\u003e4. Morning or night?\u003c\/b\u003e Both work; many prefer morning for antioxidant protection, always followed by SPF 30+ if used during the day.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"MsoBodyText\"\u003e\u003cspan style=\"mso-bookmark: frequently-asked-questions;\"\u003e\u003cb\u003e5. Does Vitamin C cause purging?\u003c\/b\u003e No — irritation is more likely temporary sensitivity; reduce frequency and reintroduce gradually if this occurs.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"MsoBodyText\"\u003e\u003cspan style=\"mso-bookmark: frequently-asked-questions;\"\u003e\u003cb\u003e6. Why refrigerate it?\u003c\/b\u003e Pure L-Ascorbic Acid is sensitive to heat, light, and air; refrigerating at 3–10°C after opening helps slow oxidation and preserve effectiveness.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"MsoBodyText\"\u003e\u003cspan style=\"mso-bookmark: frequently-asked-questions;\"\u003e\u003cb\u003e7. How do I know if it’s oxidized?\u003c\/b\u003e A light pale-yellow color is normal; dark orange or brown indicates significant oxidation and reduced effectiveness.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"MsoBodyText\"\u003e\u003cspan style=\"mso-bookmark: frequently-asked-questions;\"\u003e\u003cb\u003e8. Can I use it with Niacinamide, Retinol, or Azelaic Acid?\u003c\/b\u003e Yes — it pairs well with these; introduce AHA\/BHA gradually, and use copper peptide products at a different time of day than pure Vitamin C.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch2\u003e\n\u003ca name=\"ready-for-brighter-more-even-skin\"\u003e\u003c\/a\u003eReady for Brighter, More Even Skin?\u003c\/h2\u003e\n\u003cp class=\"FirstParagraph\"\u003e\u003cspan style=\"mso-bookmark: ready-for-brighter-more-even-skin;\"\u003eFade dark spots and restore radiance with \u003cb\u003eCOSRX The Vitamin C 13 Serum 20 ml\u003c\/b\u003e — a beginner-friendly Dual Vitamin C formula that hydrates while it brightens. Shop from a trusted retailer today for genuine COSRX quality and a smoother, more even-looking complexion.\u003c\/span\u003e\u003c\/p\u003e","brand":"SAHRISH FASHION","offers":[{"title":"Default Title","offer_id":51824090513628,"sku":"SH - 8800311121911","price":1680.0,"currency_code":"BDT","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0744\/9133\/0780\/files\/cosrx-vitamin-c-serum-texture.webp?v=1784788954","url":"https:\/\/sahrishfashion.com\/products\/cosrx-the-vitamin-c-13-serum-20ml","provider":"SAHRISH FASHION","version":"1.0","type":"link"}