{"product_id":"round-lab-vita-niacinamide-dark-spot-serum-mask-10ea-mirai-skin-round-lab-vita-niacinamide-dark-spot-serum-mask-10ea","title":"ROUND LAB Vita Niacinamide Dark Spot Serum Mask 10ea","description":"\u003ch2\u003eROUND LAB Vita Niacinamide Dark Spot Serum Mask: Brightening Sheet Mask Treatment\u003c\/h2\u003e\n\u003cp\u003eThis is Round Lab's brightening sheet mask combining vitamin C, niacinamide, and dark-spot-targeting actives in a weekly treatment format. The Vita Niacinamide line positions as a targeted brightening family addressing post-inflammatory hyperpigmentation, melasma, and uneven tone. Combining vitamin C and niacinamide in one product is now standard (the old myth that they shouldn't mix has been debunked). At $40.80 for 10 masks ($4.08 per mask), this sits in the mid-premium sheet mask tier.\u003c\/p\u003e\n\u003cp\u003eThe \"serum mask\" designation indicates higher active concentration than typical daily sheet masks. The extended contact time under the sheet delivers doses that would require longer application windows in a leave-on serum. For targeted dark spot work, weekly mask sessions can meaningfully accelerate fading compared to serum-only routines.\u003c\/p\u003e\n\u003ch3\u003eWhat It Does\u003c\/h3\u003e\n\u003cp\u003eVitamin C inhibits tyrosinase (reducing new melanin production) and provides antioxidant defense. Niacinamide blocks melanin transfer to surface skin cells and supports barrier function. Supporting actives (often alpha arbutin, tranexamic acid, or similar brighteners) add compound effect. Over 6 to 10 weeks of weekly use, expect visible fading of post-acne marks, melasma, and sun spots.\u003c\/p\u003e\n\u003ch3\u003eWho It's For\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eDark spots and post-acne marks:\u003c\/strong\u003e Primary demographic for brightening mask.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUneven skin tone:\u003c\/strong\u003e Compound actives address multiple pigment pathways.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMelasma sufferers:\u003c\/strong\u003e Weekly concentrated treatment supplement to daily routine.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeekly brightening rotation:\u003c\/strong\u003e Slots into treatment mask schedule.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVitamin C and niacinamide routine users:\u003c\/strong\u003e Concentrated version of daily actives.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eKey Specs\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eVolume: 10 masks\u003c\/li\u003e\n\u003cli\u003ePrice: $40.80 ($4.08 per mask)\u003c\/li\u003e\n\u003cli\u003eHero actives: vitamin C, niacinamide, supporting brighteners\u003c\/li\u003e\n\u003cli\u003eSheet: pulp-based\u003c\/li\u003e\n\u003cli\u003eFragrance: minimal\u003c\/li\u003e\n\u003cli\u003eFrequency: 1 to 2 times weekly\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eHow to Use\u003c\/h3\u003e\n\u003cp\u003eAfter cleansing and toner, unfold mask and align with face. Press for full skin contact. Leave 15 to 20 minutes. Remove and pat remaining essence into skin. Don't rinse. Follow with moisturizer.\u003c\/p\u003e\n\u003cp\u003eUse 1 to 2 times weekly. Always use SPF the following morning; brightening actives create slight photosensitivity. Stack with daily vitamin C and niacinamide serums for compound effect.\u003c\/p\u003e\n\u003ch3\u003eFAQ\u003c\/h3\u003e\n\u003ch4\u003eDoes vitamin C stay stable in a sheet mask?\u003c\/h4\u003e\n\u003cp\u003eStability depends on formulation. L-ascorbic acid degrades fast in aqueous solutions; most sheet masks use stable vitamin C derivatives (ascorbyl glucoside, MAP, etc.) for better shelf stability. Check ingredient list if stability concerns you.\u003c\/p\u003e\n\u003ch4\u003eCan I use it with retinol?\u003c\/h4\u003e\n\u003cp\u003eYes, with spacing. Use this mask on non-retinol nights, or apply retinol first, let absorb 10 minutes, then use the mask.\u003c\/p\u003e\n\u003ch4\u003eHow does it compare to daily vitamin C and niacinamide serums?\u003c\/h4\u003e\n\u003cp\u003eDaily serums: consistent lower-concentration delivery. Weekly mask: concentrated boost with extended contact time. Ideal: use both. The mask supplements daily serums for accelerated results.\u003c\/p\u003e\n\u003ch4\u003eWhen will I see results?\u003c\/h4\u003e\n\u003cp\u003eGlow and brightness: 2 to 3 uses. Visible dark spot fading: 6 to 10 weeks of weekly use. Deeper melasma: 12+ weeks or combine with professional treatments.\u003c\/p\u003e\n\u003ch4\u003eIs it safe for sensitive skin?\u003c\/h4\u003e\n\u003cp\u003eGenerally yes, though users with severe reactivity may notice mild tingling from vitamin C. Reduce to 2 to 3 times monthly if irritation occurs.\u003c\/p\u003e\n\u003ch3\u003eRelated Products\u003c\/h3\u003e\n\u003cp\u003ePair with Round Lab Camellia Sun Serum for AM SPF (critical during brightening), or Round Lab Pine Calming Mask for rotation on calming weeks.\u003c\/p\u003e\n\u003cp\u003eBrowse the full Round Lab collection or related: Korean sheet masks, best Korean brightening products.\u003c\/p\u003e\n","brand":"mirai-skin","offers":[{"title":"Default Title","offer_id":51741072654624,"sku":"53812871135604","price":16.32,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1004\/8333\/4432\/files\/4c51e9d8d970093242639f44b8715d91.webp?v=1779694399","url":"https:\/\/usmirai-skin.com\/products\/round-lab-vita-niacinamide-dark-spot-serum-mask-10ea-mirai-skin-round-lab-vita-niacinamide-dark-spot-serum-mask-10ea","provider":"usmirai-skin.com","version":"1.0","type":"link"}