{"product_id":"cosrx-the-niacinamide-15-serum-20ml","title":"Cosrx The Niacinamide 15 Serum 20 ml","description":"\u003cp class=\"FirstParagraph\"\u003e\u003cb\u003eCOSRX The Niacinamide 15 Serum 20 ml\u003c\/b\u003e is a high-strength Korean serum for excess oil, enlarged pores, recurring breakouts, and post-acne marks. It combines \u003cb\u003e15% Niacinamide\u003c\/b\u003e, \u003cb\u003e2% Acetyl Glucosamine (NAG)\u003c\/b\u003e, and \u003cb\u003e1% Zinc PCA\u003c\/b\u003e to balance sebum, improve texture, and visibly refine pores without feeling heavy or greasy.\u003c\/p\u003e\n\u003cp class=\"MsoBodyText\"\u003eBuilt on a \u003cb\u003eTriple Sebum-Control Complex\u003c\/b\u003e, this fragrance-free, alcohol-free treatment is designed especially for oily, combination, and acne-prone skin, though other skin types can use it with gradual introduction. Its lightweight, fast-absorbing texture layers comfortably with moisturizer and sunscreen, and its supporting hydrators keep skin comfortable rather than stripped — making it well suited to daily use, including in hot, humid climates, for both beginner and experienced K-Beauty routines.\u003c\/p\u003e\n\u003ch2\u003e\n\u003ca name=\"key-benefits\"\u003e\u003c\/a\u003eKey Benefits\u003c\/h2\u003e\n\u003cp style=\"margin-left: .5in; text-indent: -24.0pt; mso-list: l0 level1 lfo1;\" class=\"Compact\"\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\u003eControls excess sebum\u003c\/b\u003e – 15% Niacinamide and Zinc PCA reduce shine for a fresher complexion\u003c\/span\u003e\u003c\/p\u003e\n\u003cp style=\"margin-left: .5in; text-indent: -24.0pt; mso-list: l0 level1 lfo1;\" class=\"Compact\"\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\u003eRefines the look of enlarged pores\u003c\/b\u003e – smooths texture without over-drying\u003c\/span\u003e\u003c\/p\u003e\n\u003cp style=\"margin-left: .5in; text-indent: -24.0pt; mso-list: l0 level1 lfo1;\" class=\"Compact\"\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 post-acne marks\u003c\/b\u003e – NAG works with Niacinamide to even out discoloration\u003c\/span\u003e\u003c\/p\u003e\n\u003cp style=\"margin-left: .5in; text-indent: -24.0pt; mso-list: l0 level1 lfo1;\" class=\"Compact\"\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\u003eSmooths rough texture\u003c\/b\u003e – supports a clearer, more refined-looking complexion\u003c\/span\u003e\u003c\/p\u003e\n\u003cp style=\"margin-left: .5in; text-indent: -24.0pt; mso-list: l0 level1 lfo1;\" class=\"Compact\"\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\u003eBalances oil without stripping\u003c\/b\u003e – maintains hydration and skin barrier health\u003c\/span\u003e\u003c\/p\u003e\n\u003cp style=\"margin-left: .5in; text-indent: -24.0pt; mso-list: l0 level1 lfo1;\" class=\"Compact\"\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\u003eLightweight, non-greasy\u003c\/b\u003e – fast-absorbing, comfortable in humid climates\u003c\/span\u003e\u003c\/p\u003e\n\u003cp style=\"margin-left: .5in; text-indent: -24.0pt; mso-list: l0 level1 lfo1;\" class=\"Compact\"\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 clearer-looking, blemish-prone skin\u003c\/b\u003e – ideal for congestion and blackheads\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\u003e15% Niacinamide (Vitamin B3)\u003c\/b\u003e is a high-strength concentration that regulates excess oil, refines enlarged pores, brightens uneven tone, strengthens the skin barrier, and smooths texture — beginners should introduce it gradually. \u003cb\u003e2% Acetyl Glucosamine (NAG)\u003c\/b\u003e works synergistically with Niacinamide to improve post-acne discoloration and rough texture. \u003cb\u003e1% Zinc PCA\u003c\/b\u003e helps regulate sebum while maintaining hydration, supporting a balanced, less shiny complexion.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"MsoBodyText\"\u003e\u003cspan style=\"mso-bookmark: key-ingredients;\"\u003e\u003cb\u003eTrehalose\u003c\/b\u003e, \u003cb\u003ePentylene Glycol\u003c\/b\u003e, and \u003cb\u003eButylene Glycol\u003c\/b\u003e maintain hydration and improve absorption, \u003cb\u003eAllantoin\u003c\/b\u003e soothes and supports the skin barrier, and \u003cb\u003eTocopherol (Vitamin E)\u003c\/b\u003e provides antioxidant protection against environmental stress.\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 style=\"width: 100.0%; border-collapse: collapse; mso-yfti-tbllook: 32; mso-padding-alt: 0in 5.4pt 0in 5.4pt;\" width=\"100%\" cellpadding=\"0\" cellspacing=\"0\" border=\"0\" class=\"Table\"\u003e\n\u003cthead\u003e\n\u003ctr style=\"mso-yfti-irow: -1; mso-yfti-firstrow: yes; mso-yfti-lastfirstrow: yes;\"\u003e\n\u003ctd style=\"border: none; border-bottom: solid windowtext 1.0pt; mso-border-bottom-alt: solid windowtext .25pt; padding: 0in 5.4pt 0in 5.4pt;\" valign=\"bottom\"\u003e\n\u003cp style=\"mso-yfti-cnfc: 1;\" class=\"Compact\"\u003e\u003cspan style=\"mso-bookmark: product-specifications;\"\u003eSpecification\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd style=\"border: none; border-bottom: solid windowtext 1.0pt; mso-border-bottom-alt: solid windowtext .25pt; padding: 0in 5.4pt 0in 5.4pt;\" valign=\"bottom\"\u003e\n\u003cp style=\"mso-yfti-cnfc: 1;\" class=\"Compact\"\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 style=\"padding: 0in 5.4pt 0in 5.4pt;\" valign=\"top\"\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 style=\"padding: 0in 5.4pt 0in 5.4pt;\" valign=\"top\"\u003e\n\u003cp class=\"Compact\"\u003e\u003cspan style=\"mso-bookmark: product-specifications;\"\u003eCOSRX The Niacinamide 15 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 style=\"padding: 0in 5.4pt 0in 5.4pt;\" valign=\"top\"\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 style=\"padding: 0in 5.4pt 0in 5.4pt;\" valign=\"top\"\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 style=\"padding: 0in 5.4pt 0in 5.4pt;\" valign=\"top\"\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 style=\"padding: 0in 5.4pt 0in 5.4pt;\" valign=\"top\"\u003e\n\u003cp class=\"Compact\"\u003e\u003cspan style=\"mso-bookmark: product-specifications;\"\u003eFacial 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 style=\"padding: 0in 5.4pt 0in 5.4pt;\" valign=\"top\"\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 style=\"padding: 0in 5.4pt 0in 5.4pt;\" valign=\"top\"\u003e\n\u003cp class=\"Compact\"\u003e\u003cspan style=\"mso-bookmark: product-specifications;\"\u003eHigh-Strength Niacinamide 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 style=\"padding: 0in 5.4pt 0in 5.4pt;\" valign=\"top\"\u003e\n\u003cp class=\"Compact\"\u003e\u003cspan style=\"mso-bookmark: product-specifications;\"\u003eKey Ingredients\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd style=\"padding: 0in 5.4pt 0in 5.4pt;\" valign=\"top\"\u003e\n\u003cp class=\"Compact\"\u003e\u003cspan style=\"mso-bookmark: product-specifications;\"\u003e15% Niacinamide, 2% Acetyl Glucosamine (NAG), 1% Zinc PCA, Trehalose, Allantoin, Tocopherol\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"mso-yfti-irow: 5;\"\u003e\n\u003ctd style=\"padding: 0in 5.4pt 0in 5.4pt;\" valign=\"top\"\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 style=\"padding: 0in 5.4pt 0in 5.4pt;\" valign=\"top\"\u003e\n\u003cp class=\"Compact\"\u003e\u003cspan style=\"mso-bookmark: product-specifications;\"\u003eTriple Sebum-Control Complex, Pore-Refining Formula\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"mso-yfti-irow: 6;\"\u003e\n\u003ctd style=\"padding: 0in 5.4pt 0in 5.4pt;\" valign=\"top\"\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 style=\"padding: 0in 5.4pt 0in 5.4pt;\" valign=\"top\"\u003e\n\u003cp class=\"Compact\"\u003e\u003cspan style=\"mso-bookmark: product-specifications;\"\u003eOily, Combination, Acne-Prone, Normal (Dry \u0026amp; Sensitive with gradual introduction)\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"mso-yfti-irow: 7;\"\u003e\n\u003ctd style=\"padding: 0in 5.4pt 0in 5.4pt;\" valign=\"top\"\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 style=\"padding: 0in 5.4pt 0in 5.4pt;\" valign=\"top\"\u003e\n\u003cp class=\"Compact\"\u003e\u003cspan style=\"mso-bookmark: product-specifications;\"\u003eExcess Sebum, Enlarged Pores, Rough Texture, Acne Marks, Uneven Skin Tone, Congestion, Blackheads\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"mso-yfti-irow: 8;\"\u003e\n\u003ctd style=\"padding: 0in 5.4pt 0in 5.4pt;\" valign=\"top\"\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 style=\"padding: 0in 5.4pt 0in 5.4pt;\" valign=\"top\"\u003e\n\u003cp class=\"Compact\"\u003e\u003cspan style=\"mso-bookmark: product-specifications;\"\u003eLightweight Watery Serum, Fast-Absorbing, Non-Greasy\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"mso-yfti-irow: 9;\"\u003e\n\u003ctd style=\"padding: 0in 5.4pt 0in 5.4pt;\" valign=\"top\"\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 style=\"padding: 0in 5.4pt 0in 5.4pt;\" valign=\"top\"\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: 10;\"\u003e\n\u003ctd style=\"padding: 0in 5.4pt 0in 5.4pt;\" valign=\"top\"\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 style=\"padding: 0in 5.4pt 0in 5.4pt;\" valign=\"top\"\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: 11;\"\u003e\n\u003ctd style=\"padding: 0in 5.4pt 0in 5.4pt;\" valign=\"top\"\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 style=\"padding: 0in 5.4pt 0in 5.4pt;\" valign=\"top\"\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: 12;\"\u003e\n\u003ctd style=\"padding: 0in 5.4pt 0in 5.4pt;\" valign=\"top\"\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 style=\"padding: 0in 5.4pt 0in 5.4pt;\" valign=\"top\"\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: 13; mso-yfti-lastrow: yes;\"\u003e\n\u003ctd style=\"padding: 0in 5.4pt 0in 5.4pt;\" valign=\"top\"\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 style=\"padding: 0in 5.4pt 0in 5.4pt;\" valign=\"top\"\u003e\n\u003cp class=\"Compact\"\u003e\u003cspan style=\"mso-bookmark: product-specifications;\"\u003eCool, dry place away from sunlight; keep bottle tightly closed\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\u003c\/h2\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;\"\u003eIdeal for \u003cb\u003eoily skin\u003c\/b\u003e needing sebum control, \u003cb\u003ecombination skin\u003c\/b\u003e balancing oil without over-drying, and \u003cb\u003eacne-prone skin\u003c\/b\u003e targeting post-acne marks and congestion. \u003cb\u003eNormal skin\u003c\/b\u003e benefits from smoother texture and clarity, while it also suits \u003cb\u003ehumid-climate skincare\u003c\/b\u003e. \u003cb\u003eSensitive\u003c\/b\u003e and \u003cb\u003edry skin\u003c\/b\u003e can use it with gradual introduction, a patch test, and a hydrating moisturizer. Avoid if you have known allergies or broken\/irritated skin; consult a professional if pregnant or breastfeeding.\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 a lightweight moisturizer. Beginners should start \u003cb\u003e2–3 evenings\/week\u003c\/b\u003e, increasing gradually to daily use as skin adjusts. Always finish daytime routines with \u003cb\u003ebroad-spectrum sunscreen (SPF 30+)\u003c\/b\u003e; patch test before first use.\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 recognized Korean skincare brand known for evidence-based, fragrance-free formulations rather than 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\u003e\u003cspan style=\"mso-bookmark: frequently-asked-questions;\"\u003e\u003cb\u003e1. What is this serum for?\u003c\/b\u003e \u003c\/span\u003e\u003cspan style=\"mso-bookmark: frequently-asked-questions;\"\u003eA high-strength Korean serum with 15% Niacinamide, 2% NAG, and 1% Zinc PCA that controls oil, refines enlarged pores, and improves post-acne marks and texture.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"MsoBodyText\"\u003e\u003cspan style=\"mso-bookmark: frequently-asked-questions;\"\u003e\u003cb\u003e2. Is 15% Niacinamide too strong for beginners?\u003c\/b\u003e It’s a high-strength concentration — start 2–3 evenings\/week, patch test first, and increase gradually as skin adjusts.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"MsoBodyText\"\u003e\u003cspan style=\"mso-bookmark: frequently-asked-questions;\"\u003e\u003cb\u003e3. Can it help with enlarged pores?\u003c\/b\u003e Yes — by balancing sebum and refining texture, though no skincare permanently shrinks pores.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"MsoBodyText\"\u003e\u003cspan style=\"mso-bookmark: frequently-asked-questions;\"\u003e\u003cb\u003e4. Does it help fade acne marks?\u003c\/b\u003e Yes — Niacinamide and NAG together improve post-acne discoloration 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\u003e5. Does Niacinamide cause purging?\u003c\/b\u003e No — it doesn’t significantly increase cell turnover like retinoids or acids, so new breakouts are usually unrelated to purging.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"MsoBodyText\"\u003e\u003cspan style=\"mso-bookmark: frequently-asked-questions;\"\u003e\u003cb\u003e6. Can I use it with Vitamin C, Retinol, or BHA?\u003c\/b\u003e Yes — it layers well with Vitamin C, Retinol, Salicylic Acid, Azelaic Acid, and Hyaluronic Acid; introduce combinations gradually.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"MsoBodyText\"\u003e\u003cspan style=\"mso-bookmark: frequently-asked-questions;\"\u003e\u003cb\u003e7. How long until I see results?\u003c\/b\u003e Oil control and smoother skin often appear within \u003cb\u003e2–4 weeks\u003c\/b\u003e; pore and acne-mark improvements typically show after \u003cb\u003e6–8 weeks\u003c\/b\u003e.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"MsoBodyText\"\u003e\u003cspan style=\"mso-bookmark: frequently-asked-questions;\"\u003e\u003cb\u003e8. How do I verify an original product?\u003c\/b\u003e Buy from a trusted retailer and check the official COSRX logo, batch number, manufacturing details, and expiry date.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch2\u003e\n\u003ca name=\"ready-for-balanced-refined-looking-skin\"\u003e\u003c\/a\u003eReady for Balanced, Refined-Looking Skin?\u003c\/h2\u003e\n\u003cp class=\"FirstParagraph\"\u003e\u003cspan style=\"mso-bookmark: ready-for-balanced-refined-looking-skin;\"\u003eTarget oil, enlarged pores, and post-acne marks with \u003cb\u003eCOSRX The Niacinamide 15 Serum 20 ml\u003c\/b\u003e — a high-strength, barrier-friendly formula for oily and acne-prone skin. Shop from a trusted retailer today for genuine COSRX quality and a clearer, smoother-looking complexion.\u003c\/span\u003e\u003c\/p\u003e","brand":"SAHRISH FASHION","offers":[{"title":"Default Title","offer_id":51824315891932,"sku":"SH - 8809598454637","price":1950.0,"currency_code":"BDT","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0744\/9133\/0780\/files\/cosrx-the-niacinamide-15-serum-20ml-front.webp?v=1784726196","url":"https:\/\/sahrishfashion.com\/products\/cosrx-the-niacinamide-15-serum-20ml","provider":"SAHRISH FASHION","version":"1.0","type":"link"}