{"product_id":"cosrx-the-vitamin-c-13-serum","title":"COSRX The Vitamin C 13 Serum","description":"\u003cp\u003e\u003cstrong\u003eCOSRX The Vitamin C 13 Serum\u003c\/strong\u003e is a lightweight water-based vitamin C serum with 13% pure ascorbic acid that helps improve the appearance of dark spots, uneven tone, dullness and early signs of aging while providing additional hydration.\u003c\/p\u003e\n\n\u003cp\u003eThe formula combines \u003cstrong\u003e13% pure vitamin C\u003c\/strong\u003e with 3-O-ethyl ascorbic acid, tocotrienols, hyaluronic acid, allantoin, panthenol, glutathione, niacinamide and licorice root extract. The watery texture absorbs quickly without a heavy or sticky finish and is designed for daily use in both morning and evening skincare routines. Regular use helps support a brighter, smoother and more radiant-looking complexion.\u003c\/p\u003e\n\n\u003ch3\u003eBenefits\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eHelps improve the appearance of dark spots and uneven pigmentation.\u003c\/li\u003e\n\u003cli\u003eHelps brighten dull-looking skin.\u003c\/li\u003e\n\u003cli\u003eHelps improve skin texture and the appearance of pores.\u003c\/li\u003e\n\u003cli\u003eProvides antioxidant care against environmental stress.\u003c\/li\u003e\n\u003cli\u003eHelps support smoother and more elastic-looking skin.\u003c\/li\u003e\n\u003cli\u003eProvides lightweight hydration.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWho is it for\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eSkin with visible dark spots or uneven tone.\u003c\/li\u003e\n\u003cli\u003eDull and tired-looking skin.\u003c\/li\u003e\n\u003cli\u003eSkin with rough or uneven texture.\u003c\/li\u003e\n\u003cli\u003eSkin showing early signs of aging.\u003c\/li\u003e\n\u003cli\u003eThose looking for a daily pure vitamin C serum.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eMain ingredients\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cstrong\u003ePure Vitamin C (Ascorbic Acid) 13%\u003c\/strong\u003e – helps improve the appearance of discoloration and uneven skin tone.\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003e3-O-Ethyl Ascorbic Acid\u003c\/strong\u003e – a vitamin C derivative that provides additional antioxidant and brightening care.\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eTocotrienols \u0026amp; Tocopherol\u003c\/strong\u003e – vitamin E antioxidants that help protect against oxidative stress.\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eSodium Hyaluronate\u003c\/strong\u003e – helps attract and retain moisture in the skin.\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eAllantoin\u003c\/strong\u003e – helps soothe and maintain skin comfort.\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003ePanthenol\u003c\/strong\u003e – helps moisturize and support the skin barrier.\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eGlutathione\u003c\/strong\u003e – provides antioxidant care and supports a brighter-looking complexion.\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eNiacinamide\u003c\/strong\u003e – helps support the skin barrier and improve uneven-looking tone.\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eLicorice Root Extract\u003c\/strong\u003e – helps soothe and support a clearer-looking complexion.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow to use\u003c\/h3\u003e\n\u003cp\u003eAfter cleansing, apply a few drops of \u003cstrong\u003eCOSRX The Vitamin C 13 Serum\u003c\/strong\u003e to the face during the serum step. Gently massage from the center of the face outward until fully absorbed. The serum can be used in the morning and evening. When used in the morning, always follow with sunscreen of SPF 30 or higher.\u003c\/p\u003e\n\n\u003ch3\u003eFAQ\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eCan COSRX The Vitamin C 13 Serum be used every day?\u003c\/strong\u003e\u003cbr\u003eYes. COSRX designed the 13% formula as a daily vitamin C serum suitable for regular morning and evening use.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eDoes COSRX The Vitamin C 13 Serum need to be refrigerated?\u003c\/strong\u003e\u003cbr\u003eYes. COSRX recommends storing the opened serum upright in the refrigerator at 3–10°C to help preserve the active vitamin C.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eHow long should COSRX The Vitamin C 13 Serum be used after opening?\u003c\/strong\u003e\u003cbr\u003eCOSRX recommends using the serum within approximately two months after opening for best freshness and performance.\u003c\/p\u003e\n\n\u003ch3\u003eWarnings\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eFor external use only.\u003c\/li\u003e\n\u003cli\u003eWhen used in the morning, follow with sunscreen of SPF 30 or higher.\u003c\/li\u003e\n\u003cli\u003eAvoid using at the same time as high-concentration copper peptide products; use them at different times of day instead.\u003c\/li\u003e\n\u003cli\u003eDiscontinue use if irritation, redness, swelling or itching occurs.\u003c\/li\u003e\n\u003cli\u003eStore upright in the refrigerator at 3–10°C after opening.\u003c\/li\u003e\n\u003cli\u003eUse within approximately 2 months after opening.\u003c\/li\u003e\n\u003cli\u003eKeep the container tightly closed and protect it from heat and direct sunlight.\u003c\/li\u003e\n\u003c\/ul\u003e\n","brand":"Cosrx","offers":[{"title":"20 ml.","offer_id":48616845246811,"sku":"YK2367","price":19.9,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0525\/1245\/6855\/files\/COSRXTheVitaminC13Serum.webp?v=1728259208","url":"https:\/\/yokoskincare.fi\/en\/products\/cosrx-the-vitamin-c-13-serum","provider":"Yoko","version":"1.0","type":"link"}