{"product_id":"isntree-hyper-vitamin-c-23-serum-20ml","title":"ISNTREE Hyper Vitamin C 23 Serum 20ml","description":"\u003cp\u003e\u003cstrong\u003e\u003cspan\u003e23% Pure Vitamin C for Brighter, Clearer \u0026amp; More Even-Looking Skin\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eReveal your natural glow with \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eISNTREE Hyper Vitamin C 23 Serum\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e, a high-potency Korean brightening serum formulated with 23% pure Vitamin C (Ascorbic Acid) to help improve the appearance of dark spots, uneven skin tone, and dullness.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003ePowered by concentrated Vitamin C and enriched with Vitamin E, Panthenol, and Birch Sap, this intensive brightening serum combines antioxidant care with refreshing hydration to promote a smoother, more radiant-looking complexion.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eUnlike many high-concentration Vitamin C serums that can feel drying, its lightweight, moisture-rich formula helps keep skin feeling hydrated and comfortable while delivering targeted brightening care.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eWhether you're concerned about dark spots, post-acne marks, or a tired-looking complexion, this concentrated Vitamin C serum is designed to support a brighter, healthier-looking glow.\u003cbr\u003e\u003cbr\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003ch2\u003e\u003cspan\u003eKey Benefits\u003c\/span\u003e\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003e23% Pure Vitamin C:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e A high-concentration Ascorbic Acid formula that helps visibly improve dullness and uneven skin tone.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eDark Spot \u0026amp; Hyperpigmentation Care:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Helps reduce the appearance of dark spots and post-blemish marks for a more even-looking complexion.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eTriple Tone Appearance Care:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Targets the appearance of dullness and uneven facial tone for a clearer, more balanced-looking complexion.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eAntioxidant-Rich Formula:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Vitamin C and Vitamin E provide antioxidant skincare support against environmental stressors.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eHydrating \u0026amp; Comforting Care:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Panthenol, Birch Sap, and moisturizing ingredients help maintain skin hydration and comfort.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eLightweight Serum Texture:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e A hydrating formula that absorbs comfortably without a heavy finish.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eConcentrated Brightening Solution:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Designed for those seeking intensive Vitamin C care as part of their skincare routine.\u003cbr\u003e\u003cbr\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003e\u003cspan\u003eKey Ingredients\u003c\/span\u003e\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003e23% Pure Vitamin C (Ascorbic Acid)\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eA potent antioxidant and brightening ingredient that helps improve the appearance of hyperpigmentation, dark spots, and uneven skin tone. Supports a clearer, more radiant-looking complexion.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eEthyl Ascorbyl Ether (Vitamin C Derivative)\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eA stabilized Vitamin C derivative that complements the pure Vitamin C formula and supports a brighter, more even-looking skin tone.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eVitamin E (Tocopherol)\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eAn antioxidant ingredient that works alongside Vitamin C to help protect the skin from environmental oxidative stress and support a healthy-looking complexion.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003ePanthenol (Pro-Vitamin B5)\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eHelps soothe and moisturize the skin while supporting a comfortable, healthy-looking skin barrier.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eBirch Sap (Betula Platyphylla Japonica Juice)\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eA botanical ingredient that helps provide refreshing hydration and maintain a soft, moisturized skin feel.\u003cbr\u003e\u003cbr\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003ch2\u003e\u003cspan\u003eTexture \u0026amp; Finish\u003c\/span\u003e\u003c\/h2\u003e\n\u003cp\u003e\u003cspan\u003eA lightweight, moisture-rich serum that spreads smoothly and absorbs comfortably.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eDesigned to deliver concentrated Vitamin C care while maintaining a hydrated, refreshed finish.\u003cbr\u003e\u003cbr\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003ch2\u003e\u003cspan\u003eRecommended For\u003c\/span\u003e\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eDull and tired-looking skin\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eDark spots and uneven skin tone\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003ePost-acne marks and visible pigmentation concerns\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eSkin lacking clarity and radiance\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eThose looking for a high-strength Vitamin C serum\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eSkin Type Note:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Due to its high concentration of pure Vitamin C, this serum is best introduced gradually, especially for first-time Vitamin C users or those with sensitive skin.\u003cbr\u003e\u003cbr\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003ch2\u003e\u003cspan\u003eBrand-Reported Skin Tone Evaluation\u003c\/span\u003e\u003c\/h2\u003e\n\u003cp\u003e\u003cspan\u003eISNTREE reports that its Hyper Vitamin C 23 Serum was evaluated for improvements in the appearance of red, yellow, and dark facial tones after a single application.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThe single-use human application study involved 20 participants and was conducted by Corederm Dermatological Science Institute on May 22, 2023.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cem\u003e\u003cspan\u003eResults reflect an immediate, single-use assessment. Individual results may vary.\u003cbr\u003e\u003cbr\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/em\u003e\u003c\/p\u003e\n\u003ch2\u003e\u003cspan\u003eHow to Use\u003c\/span\u003e\u003c\/h2\u003e\n\u003col start=\"1\"\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eAfter cleansing, apply your regular toner and allow your skin to dry.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eDispense 2–3 drops of ISNTREE Hyper Vitamin C 23 Serum onto your palm.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eGently spread across the face, avoiding the immediate eye area and irritated skin.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eLightly pat until absorbed.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eFollow with a moisturizer to maintain hydration.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eFor First-Time Vitamin C Users:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Start with 1–2 applications per week or once every 3–4 days. Gradually increase frequency depending on your skin's tolerance.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eRecommended Use:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Evening application is preferred. If used during the daytime, always follow with a broad-spectrum sunscreen of SPF 30 or higher.\u003cbr\u003e\u003cbr\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003ch2\u003e\u003cspan\u003eCautions\u003c\/span\u003e\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003ePatch Test Before Use:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e High-concentration Vitamin C may cause irritation depending on individual skin sensitivity. Perform a patch test before applying to the entire face.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eAdjust Usage Frequency:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Start slowly and increase the amount and frequency gradually according to your skin's tolerance.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eAvoid Harsh Exfoliation:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Do not combine in the same routine with irritating scrubs, strong peeling treatments, or exfoliating devices. Use extra caution when pairing with AHA or BHA exfoliants.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eSun Protection Is Essential:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e If using during the day, apply broad-spectrum sunscreen to help protect your skin from UV exposure.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eAvoid Compromised Skin:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Do not apply to broken or significantly irritated skin. Discontinue use if persistent redness, burning, swelling, or irritation occurs.\u003cbr\u003e\u003cbr\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003e\u003cspan\u003eFrequently Asked Questions (FAQ)\u003c\/span\u003e\u003c\/h2\u003e\n\u003ch3\u003e\u003cspan\u003eQ1. How often should I use ISNTREE Hyper Vitamin C 23 Serum?\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cspan\u003eBecause this serum contains a high concentration of 23% pure Vitamin C, we recommend starting with 1–2 applications per week, particularly if you are new to Vitamin C skincare.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eGradually increase the frequency based on your skin's tolerance. Daily use is not necessary for beginners.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cspan\u003eQ2. Can I use this 23% Vitamin C serum during the day?\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cspan\u003eYes, but evening use is recommended, particularly for those new to high-strength Vitamin C.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eIf you prefer using it in the morning, always follow with a broad-spectrum sunscreen of SPF 30 or higher to help protect your skin from UV damage.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cspan\u003eQ3. Can I use this serum with AHA, BHA, or other exfoliating products?\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cspan\u003eCombining high-concentration Vitamin C with strong exfoliating acids, scrubs, or peeling treatments may increase the risk of irritation.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eFor sensitive skin, avoid using these products in the same routine. Consider applying exfoliating products on alternate days instead.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cspan\u003eQ4. Is it normal to experience redness, tingling, or flaking after using this serum?\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cspan\u003eHigh-strength Vitamin C may cause tingling or irritation, particularly when first introduced into a skincare routine.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eHowever, redness, burning, or flaking should not be considered proof that the product is working.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eIf irritation occurs, stop using the serum and allow your skin to recover. If symptoms are severe or persistent, seek professional advice before using it again.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cspan\u003eQ5. How should I store ISNTREE Hyper Vitamin C 23 Serum?\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cspan\u003eFor optimal freshness, store the serum in the refrigerator after opening.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eKeep the bottle tightly closed and protected from heat and direct sunlight. The brand recommends finishing the product within 3 months after opening to help maintain its quality.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cspan\u003eQ6. Why has my Vitamin C serum become darker or developed a different smell?\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cspan\u003ePure Vitamin C is sensitive to air, light, and heat. Over time, the serum may gradually deepen in color or develop a noticeable scent as oxidation occurs.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eMinor changes can occur naturally. However, if the serum becomes significantly darker, such as deep orange or brown, discontinue use.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eFor optimal freshness, use the serum within 3 months of opening and store it properly.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cspan\u003eQ7. Why does the bottle make a hissing sound when opened?\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cspan\u003eAccording to the brand, gas may develop due to the characteristics of the Vitamin C formula, which can cause a slight hissing sound when opening the container.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThe packaging is designed with protective sealing to help minimize potential leakage.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eAvoid shaking the unopened bottle. After attaching the dropper securely, gently move the bottle from side to side before use if needed.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eIf you notice unusual pressure, significant leakage, or damaged packaging, please contact customer support before use.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cspan\u003eQ8. Why does the bottle look partially empty? Is it underfilled?\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cspan\u003eNo. The bottle is intentionally designed with additional space to accommodate the characteristics of the formula and allow for safe handling.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eEach bottle contains the stated net volume of \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003e20ml\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e, even if the container does not appear completely full.\u003cbr\u003e\u003cbr\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003ch2\u003e\u003cspan\u003eFull Ingredients\u003c\/span\u003e\u003c\/h2\u003e\n\u003cp\u003e\u003cspan\u003eWater, Ascorbic Acid (23%), Propanediol, Betaine, 1,2-Hexanediol, Polyglycerin-3, Tromethamine, Ethyl Ascorbyl Ether, Hydroxyethyl Urea, Betula Platyphylla Japonica Juice, Ethylhexylglycerin, Adenosine, Disodium EDTA, Panthenol, Gardenia Florida Fruit Extract, Dextrin, Tocopherol.\u003cbr\u003e\u003cbr\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eIntensive Vitamin C Care for Brighter, More Radiant-Looking Skin.\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cem\u003e\u003cspan\u003eMade in South Korea | Net Volume: 20ml\u003c\/span\u003e\u003c\/em\u003e\u003c\/p\u003e","brand":"korea skin mall","offers":[{"title":"Default Title","offer_id":67786635149602,"sku":null,"price":27.41,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0929\/7494\/0450\/files\/ISNTREEHyperVitaminC23Serum20ml.webp?v=1794472196","url":"https:\/\/k-skinmall.com\/products\/isntree-hyper-vitamin-c-23-serum-20ml","provider":"korea skin mall","version":"1.0","type":"link"}