{"id":14038,"date":"2026-04-17T11:12:30","date_gmt":"2026-04-17T11:12:30","guid":{"rendered":"https:\/\/koreanwonder.com\/?post_type=product&#038;p=14038"},"modified":"2026-04-17T11:17:22","modified_gmt":"2026-04-17T11:17:22","slug":"cu-skin-clean-up-vitamin-c-serum-20ml","status":"publish","type":"product","link":"https:\/\/koreanwonder.com\/en\/product\/cu-skin-clean-up-vitamin-c-serum-20ml\/","title":{"rendered":"CU Skin Clean-Up Vitamin C+ Serum, 20ml"},"content":{"rendered":"<p><b>Benefits<\/b><\/p>\n<p><b>Brightening &amp; Tone Evening: <\/b>Reduces the appearance of dark spots, freckles, and hyperpigmentation (including post-acne marks) to promote a radiant, healthy-looking glow.<\/p>\n<p><b>Antioxidant Protection: <\/b>Shields the skin from environmental stressors and free radical damage caused by UV exposure and pollution.<\/p>\n<p><b>Anti-Aging &amp; Firming: <\/b>Stimulates collagen and elastin synthesis to improve skin elasticity, refine texture, and smooth fine lines.<\/p>\n<p><b>Acne &amp; Inflammation Control: <\/b>Contains antimicrobial properties that help fight acne-causing bacteria and reduce inflammation associated with breakouts.<\/p>\n<p><b>Vascular Strengthening: <\/b>Specifically indicated for conditions like couperose and rosacea as it helps strengthen the walls of blood vessels and reduces visible redness.<\/p>\n<p><b>Hydration:<\/b> Regulates water balance and provides intense moisture to prevent dryness and &#8220;tight&#8221; skin sensations.<span class=\"Apple-converted-space\">\u00a0<\/span><\/p>\n<p>&nbsp;<\/p>\n<p><b>Recommended Skin Types and Concerns<\/b><\/p>\n<p><b>All Skin Types: <\/b>The serum is suitable for oily, dry, normal, and combination skin.<\/p>\n<p><b>Sensitive Skin:<\/b> It contains stabilized, non-acidic forms of Vitamin C that provide benefits without the typical irritation associated with pure L-ascorbic acid.<\/p>\n<p><b>Acne-Prone Skin:<\/b> One of its primary forms of Vitamin C, Sodium Ascorbyl Phosphate, has documented anti-microbial properties that help fight acne-causing bacteria.<span class=\"Apple-converted-space\">\u00a0<\/span><\/p>\n<p><b>Hyperpigmentation &amp; Dark Spots:<\/b> It is designed to lighten specific areas of the face, targeting freckles, sun spots, and post-acne marks.<\/p>\n<p><b>Dullness &amp; Uneven Tone: <\/b>The serum works to revitalize &#8220;tired&#8221; skin, restoring a radiant, healthy glow and a more even complexion.<\/p>\n<p><b>Loss of Elasticity &amp; Wrinkles: <\/b>By stimulating collagen and elastin synthesis, it helps smooth fine lines\u2014specifically around the lips and nasolabial folds\u2014and improves skin firmness.<\/p>\n<p><b>Vascular Issues (Rosacea\/Couperose):<\/b> It is particularly indicated for strengthening the walls of blood vessels, making it helpful for those with visible capillaries.<\/p>\n<p>&nbsp;<\/p>\n<p><b>Active Ingredients<\/b><\/p>\n<p><b>Vitamin C (Triple Complex):<\/b> Uses three forms for varied absorption and stability:<\/p>\n<p><b>Sodium Ascorbyl Phosphate (SAP):<\/b> Found at a concentration of 45,000 ppm (4.5%). This stable derivative is known for anti-acne and antioxidant benefits without causing high irritation.<\/p>\n<p><b>3-O-Ethyl Ascorbic Acid:<\/b> A highly stable, etherified derivative that effectively fades dark spots and boosts collagen.<\/p>\n<p><b>Ascorbic Acid:<\/b> Pure Vitamin C at 10 ppm to provide immediate antioxidant protection.<\/p>\n<p><b>Niacinamide (Vitamin B3):<\/b> Strengthens the skin barrier, regulates oil production, and works synergistically with Vitamin C to even skin tone.<\/p>\n<p><b>Hydroxydecyl Ubiquinone (Idebenone):<\/b> A powerful antioxidant that protects against environmental stressors and helps improve fine lines.<span class=\"Apple-converted-space\">\u00a0<\/span><\/p>\n<p><b>Sodium Hyaluronate: <\/b>A form of Hyaluronic Acid that deeply hydrates and plumps the skin by retaining moisture.<\/p>\n<p><b>Betaine &amp; Arginine: <\/b>Natural moisturizing factors (NMF) and amino acids that soothe the skin and maintain its water balance.<\/p>\n<p><b>Hydrogenated Lecithin: <\/b>Helps with skin repair and increases the elasticity of the skin barrier.<\/p>\n<p><b>Viscum Album (Mistletoe) Extract:<\/b> Provides additional soothing and anti-inflammatory properties.<span class=\"Apple-converted-space\">\u00a0<\/span><\/p>\n<p>&nbsp;<\/p>\n<p><b>How to Use<\/b><\/p>\n<p>Wash your face with a gentle cleanser to remove oil and impurities.<\/p>\n<p>Apply a toner to balance the skin&#8217;s pH and prep it for better absorption.<\/p>\n<p>Use the pipette to dispense a small amount.<\/p>\n<p>Gently massage or pat the serum into your skin until fully absorbed.<\/p>\n<p>Focus on areas with hyperpigmentation or dullness.<\/p>\n<p>Allow the serum to absorb for a short time.<\/p>\n<p>Apply your regular cream to lock in the serum and hydrate your skin.<\/p>\n<p>Sunscreen (AM only): Always finish with high-SPF sunscreen in the morning, as Vitamin C works synergistically with SPF to protect against UV damage.<span class=\"Apple-converted-space\">\u00a0<\/span><\/p>\n<p><b>Important Usage Tips<\/b><\/p>\n<p><b>Storage:<\/b> Keep the bottle in a cool, dark place to prevent the Vitamin C from oxidizing. If the serum turns dark orange or brown, it may have lost its effectiveness.<\/p>\n<p><b>Frequency: <\/b>While it can be used twice daily, beginners or those with sensitive skin should start with less frequent application, such as 2\u20133 times a week, and gradually increase to daily use.<\/p>\n<p><b>Mixing Ingredients: <\/b>Avoid using this serum in the same routine as strong actives like retinol or exfoliating acids (AHAs\/BHAs) to prevent irritation.<\/p>\n<p><b>Patch Test:<\/b> Before full application, test a small amount behind your ear for 24 hours to check for any adverse reactions.<\/p>\n<p>&nbsp;<\/p>\n<p><b>Precautions<\/b><\/p>\n<p>Before use, perform a patch test on the back of your hand to check for possible allergic reactions. Keep out of reach of children, away from direct sunlight, at room temperature. In case of contact with eyes, rinse with water. If an allergic reaction occurs, discontinue use and consult a doctor.<\/p>\n<p>&nbsp;<\/p>\n<p>* This description was created by AI as part of the brand&#8217;s information system. If you are unsure about the product&#8217;s accuracy, you may be forced to produce errors. Please verify the product details independently.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>CU Skin Clean-Up Vitamin C+ Serum is a professional-grade Korean serum designed primarily to brighten dull skin, even out skin tone, and provide strong antioxidant protection. It is specifically formulated to be gentle enough for sensitive skin while effectively targeting pigmentation.<span class=\"Apple-converted-space\">\u00a0<\/span><\/p>\n","protected":false},"featured_media":14035,"comment_status":"open","ping_status":"closed","template":"","meta":{"_acf_changed":false},"product_brand":[],"product_cat":[1326,1265,54,1350],"product_tag":[2008,1985,2001],"class_list":{"0":"post-14038","1":"product","2":"type-product","3":"status-publish","4":"has-post-thumbnail","6":"product_cat-face-care","7":"product_cat-new-arrivals","8":"product_cat-serum-ampoule","9":"product_cat-serums","10":"product_tag-glow","11":"product_tag-pigmentation","12":"product_tag-spots","14":"first","15":"instock","16":"taxable","17":"shipping-taxable","18":"purchasable","19":"product-type-simple"},"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.4 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>CU Skin Clean-Up Vitamin C+ Serum, 20ml - Korean Wonder<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/koreanwonder.com\/product\/cu-skin-clean-up-vitamin-c-serum-20ml\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"CU Skin Clean-Up Vitamin C+ Serum, 20ml - Korean Wonder\" \/>\n<meta property=\"og:description\" content=\"CU Skin Clean-Up Vitamin C+ Serum is a professional-grade Korean serum designed primarily to brighten dull skin, even out skin tone, and provide strong antioxidant protection. It is specifically formulated to be gentle enough for sensitive skin while effectively targeting pigmentation.\u00a0\" \/>\n<meta property=\"og:url\" content=\"https:\/\/koreanwonder.com\/product\/cu-skin-clean-up-vitamin-c-serum-20ml\/\" \/>\n<meta property=\"og:site_name\" content=\"Korean Wonder\" \/>\n<meta property=\"article:publisher\" content=\"https:\/\/www.facebook.com\/coreana.cosmetica.CostaBlanca\" \/>\n<meta property=\"article:modified_time\" content=\"2026-04-17T11:17:22+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/koreanwonder.com\/wp-content\/uploads\/2026\/04\/1-1-4.jpg\" \/>\n\t<meta property=\"og:image:width\" content=\"1000\" \/>\n\t<meta property=\"og:image:height\" content=\"1000\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/jpeg\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data1\" content=\"5 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/koreanwonder.com\\\/product\\\/cu-skin-clean-up-vitamin-c-serum-20ml\\\/\",\"url\":\"https:\\\/\\\/koreanwonder.com\\\/product\\\/cu-skin-clean-up-vitamin-c-serum-20ml\\\/\",\"name\":\"CU Skin Clean-Up Vitamin C+ Serum, 20ml - Korean Wonder\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/koreanwonder.com\\\/#website\"},\"primaryImageOfPage\":{\"@id\":\"https:\\\/\\\/koreanwonder.com\\\/product\\\/cu-skin-clean-up-vitamin-c-serum-20ml\\\/#primaryimage\"},\"image\":{\"@id\":\"https:\\\/\\\/koreanwonder.com\\\/product\\\/cu-skin-clean-up-vitamin-c-serum-20ml\\\/#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/koreanwonder.com\\\/wp-content\\\/uploads\\\/2026\\\/04\\\/1-1-4.jpg\",\"datePublished\":\"2026-04-17T11:12:30+00:00\",\"dateModified\":\"2026-04-17T11:17:22+00:00\",\"breadcrumb\":{\"@id\":\"https:\\\/\\\/koreanwonder.com\\\/product\\\/cu-skin-clean-up-vitamin-c-serum-20ml\\\/#breadcrumb\"},\"inLanguage\":\"en-US\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\\\/\\\/koreanwonder.com\\\/product\\\/cu-skin-clean-up-vitamin-c-serum-20ml\\\/\"]}]},{\"@type\":\"ImageObject\",\"inLanguage\":\"en-US\",\"@id\":\"https:\\\/\\\/koreanwonder.com\\\/product\\\/cu-skin-clean-up-vitamin-c-serum-20ml\\\/#primaryimage\",\"url\":\"https:\\\/\\\/koreanwonder.com\\\/wp-content\\\/uploads\\\/2026\\\/04\\\/1-1-4.jpg\",\"contentUrl\":\"https:\\\/\\\/koreanwonder.com\\\/wp-content\\\/uploads\\\/2026\\\/04\\\/1-1-4.jpg\",\"width\":1000,\"height\":1000},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\\\/\\\/koreanwonder.com\\\/product\\\/cu-skin-clean-up-vitamin-c-serum-20ml\\\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Home\",\"item\":\"https:\\\/\\\/koreanwonder.com\\\/es\\\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"Shop\",\"item\":\"https:\\\/\\\/koreanwonder.com\\\/en\\\/shop\\\/\"},{\"@type\":\"ListItem\",\"position\":3,\"name\":\"CU Skin Clean-Up Vitamin C+ Serum, 20ml\"}]},{\"@type\":\"WebSite\",\"@id\":\"https:\\\/\\\/koreanwonder.com\\\/#website\",\"url\":\"https:\\\/\\\/koreanwonder.com\\\/\",\"name\":\"Korean Wonder\",\"description\":\"\",\"publisher\":{\"@id\":\"https:\\\/\\\/koreanwonder.com\\\/#organization\"},\"potentialAction\":[{\"@type\":\"SearchAction\",\"target\":{\"@type\":\"EntryPoint\",\"urlTemplate\":\"https:\\\/\\\/koreanwonder.com\\\/?s={search_term_string}\"},\"query-input\":{\"@type\":\"PropertyValueSpecification\",\"valueRequired\":true,\"valueName\":\"search_term_string\"}}],\"inLanguage\":\"en-US\"},{\"@type\":\"Organization\",\"@id\":\"https:\\\/\\\/koreanwonder.com\\\/#organization\",\"name\":\"Korean Wonder\",\"url\":\"https:\\\/\\\/koreanwonder.com\\\/\",\"logo\":{\"@type\":\"ImageObject\",\"inLanguage\":\"en-US\",\"@id\":\"https:\\\/\\\/koreanwonder.com\\\/#\\\/schema\\\/logo\\\/image\\\/\",\"url\":\"https:\\\/\\\/koreanwonder.com\\\/wp-content\\\/uploads\\\/2026\\\/03\\\/logo-transparent-scaled.png\",\"contentUrl\":\"https:\\\/\\\/koreanwonder.com\\\/wp-content\\\/uploads\\\/2026\\\/03\\\/logo-transparent-scaled.png\",\"width\":2560,\"height\":1217,\"caption\":\"Korean Wonder\"},\"image\":{\"@id\":\"https:\\\/\\\/koreanwonder.com\\\/#\\\/schema\\\/logo\\\/image\\\/\"},\"sameAs\":[\"https:\\\/\\\/www.facebook.com\\\/coreana.cosmetica.CostaBlanca\",\"https:\\\/\\\/www.instagram.com\\\/koreanwonder_eu\\\/\"]}]}<\/script>\n<!-- \/ Yoast SEO plugin. -->","yoast_head_json":{"title":"CU Skin Clean-Up Vitamin C+ Serum, 20ml - Korean Wonder","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/koreanwonder.com\/product\/cu-skin-clean-up-vitamin-c-serum-20ml\/","og_locale":"en_US","og_type":"article","og_title":"CU Skin Clean-Up Vitamin C+ Serum, 20ml - Korean Wonder","og_description":"CU Skin Clean-Up Vitamin C+ Serum is a professional-grade Korean serum designed primarily to brighten dull skin, even out skin tone, and provide strong antioxidant protection. It is specifically formulated to be gentle enough for sensitive skin while effectively targeting pigmentation.\u00a0","og_url":"https:\/\/koreanwonder.com\/product\/cu-skin-clean-up-vitamin-c-serum-20ml\/","og_site_name":"Korean Wonder","article_publisher":"https:\/\/www.facebook.com\/coreana.cosmetica.CostaBlanca","article_modified_time":"2026-04-17T11:17:22+00:00","og_image":[{"width":1000,"height":1000,"url":"https:\/\/koreanwonder.com\/wp-content\/uploads\/2026\/04\/1-1-4.jpg","type":"image\/jpeg"}],"twitter_card":"summary_large_image","twitter_misc":{"Est. reading time":"5 minutes"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"WebPage","@id":"https:\/\/koreanwonder.com\/product\/cu-skin-clean-up-vitamin-c-serum-20ml\/","url":"https:\/\/koreanwonder.com\/product\/cu-skin-clean-up-vitamin-c-serum-20ml\/","name":"CU Skin Clean-Up Vitamin C+ Serum, 20ml - Korean Wonder","isPartOf":{"@id":"https:\/\/koreanwonder.com\/#website"},"primaryImageOfPage":{"@id":"https:\/\/koreanwonder.com\/product\/cu-skin-clean-up-vitamin-c-serum-20ml\/#primaryimage"},"image":{"@id":"https:\/\/koreanwonder.com\/product\/cu-skin-clean-up-vitamin-c-serum-20ml\/#primaryimage"},"thumbnailUrl":"https:\/\/koreanwonder.com\/wp-content\/uploads\/2026\/04\/1-1-4.jpg","datePublished":"2026-04-17T11:12:30+00:00","dateModified":"2026-04-17T11:17:22+00:00","breadcrumb":{"@id":"https:\/\/koreanwonder.com\/product\/cu-skin-clean-up-vitamin-c-serum-20ml\/#breadcrumb"},"inLanguage":"en-US","potentialAction":[{"@type":"ReadAction","target":["https:\/\/koreanwonder.com\/product\/cu-skin-clean-up-vitamin-c-serum-20ml\/"]}]},{"@type":"ImageObject","inLanguage":"en-US","@id":"https:\/\/koreanwonder.com\/product\/cu-skin-clean-up-vitamin-c-serum-20ml\/#primaryimage","url":"https:\/\/koreanwonder.com\/wp-content\/uploads\/2026\/04\/1-1-4.jpg","contentUrl":"https:\/\/koreanwonder.com\/wp-content\/uploads\/2026\/04\/1-1-4.jpg","width":1000,"height":1000},{"@type":"BreadcrumbList","@id":"https:\/\/koreanwonder.com\/product\/cu-skin-clean-up-vitamin-c-serum-20ml\/#breadcrumb","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https:\/\/koreanwonder.com\/es\/"},{"@type":"ListItem","position":2,"name":"Shop","item":"https:\/\/koreanwonder.com\/en\/shop\/"},{"@type":"ListItem","position":3,"name":"CU Skin Clean-Up Vitamin C+ Serum, 20ml"}]},{"@type":"WebSite","@id":"https:\/\/koreanwonder.com\/#website","url":"https:\/\/koreanwonder.com\/","name":"Korean Wonder","description":"","publisher":{"@id":"https:\/\/koreanwonder.com\/#organization"},"potentialAction":[{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https:\/\/koreanwonder.com\/?s={search_term_string}"},"query-input":{"@type":"PropertyValueSpecification","valueRequired":true,"valueName":"search_term_string"}}],"inLanguage":"en-US"},{"@type":"Organization","@id":"https:\/\/koreanwonder.com\/#organization","name":"Korean Wonder","url":"https:\/\/koreanwonder.com\/","logo":{"@type":"ImageObject","inLanguage":"en-US","@id":"https:\/\/koreanwonder.com\/#\/schema\/logo\/image\/","url":"https:\/\/koreanwonder.com\/wp-content\/uploads\/2026\/03\/logo-transparent-scaled.png","contentUrl":"https:\/\/koreanwonder.com\/wp-content\/uploads\/2026\/03\/logo-transparent-scaled.png","width":2560,"height":1217,"caption":"Korean Wonder"},"image":{"@id":"https:\/\/koreanwonder.com\/#\/schema\/logo\/image\/"},"sameAs":["https:\/\/www.facebook.com\/coreana.cosmetica.CostaBlanca","https:\/\/www.instagram.com\/koreanwonder_eu\/"]}]}},"_links":{"self":[{"href":"https:\/\/koreanwonder.com\/en\/wp-json\/wp\/v2\/product\/14038","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/koreanwonder.com\/en\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/koreanwonder.com\/en\/wp-json\/wp\/v2\/types\/product"}],"replies":[{"embeddable":true,"href":"https:\/\/koreanwonder.com\/en\/wp-json\/wp\/v2\/comments?post=14038"}],"version-history":[{"count":1,"href":"https:\/\/koreanwonder.com\/en\/wp-json\/wp\/v2\/product\/14038\/revisions"}],"predecessor-version":[{"id":14039,"href":"https:\/\/koreanwonder.com\/en\/wp-json\/wp\/v2\/product\/14038\/revisions\/14039"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/koreanwonder.com\/en\/wp-json\/wp\/v2\/media\/14035"}],"wp:attachment":[{"href":"https:\/\/koreanwonder.com\/en\/wp-json\/wp\/v2\/media?parent=14038"}],"wp:term":[{"taxonomy":"product_brand","embeddable":true,"href":"https:\/\/koreanwonder.com\/en\/wp-json\/wp\/v2\/product_brand?post=14038"},{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/koreanwonder.com\/en\/wp-json\/wp\/v2\/product_cat?post=14038"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/koreanwonder.com\/en\/wp-json\/wp\/v2\/product_tag?post=14038"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}