{"product_id":"iope-vitamin-c-expert-40-mask-concentrate-15g","title":"IOPE Vitamin C Expert 40% Mask Concentrate 15g","description":"\u003ch2\u003eIOPE Vitamin C Expert 40% Mask Concentrate: High-Dose Vitamin C in a Masking Format\u003c\/h2\u003e\n\n\u003cp\u003eIOPE's Vitamin C Expert 40% Mask Concentrate is one of the highest-concentration vitamin C products in Korean skincare, delivering 40% vitamin C (a stabilized derivative) in a short-contact mask format. Because 40% is too aggressive for daily leave-on use, the mask format limits skin exposure to 10 to 15 minutes, allowing a short, powerful dose without overwhelming the skin.\u003c\/p\u003e\n\n\u003cp\u003eThis is a targeted treatment, not a daily serum. Users with stubborn pigmentation, deep dullness, or pre-event glow needs use this once or twice weekly for accelerated brightening. The texture is a thick concentrate you apply like a mask and rinse off after 15 minutes, similar to a clay or cream mask but with vitamin C as the hero.\u003c\/p\u003e\n\n\u003ch3\u003eWhat It Does\u003c\/h3\u003e\n\u003cp\u003e40% vitamin C delivers high-dose antioxidant protection, pigmentation fading, and collagen support in 15 minutes. The mask format concentrates the dose: more product, shorter contact time, more punch than daily serums. Supporting ingredients include niacinamide and peptides for enhanced brightening synergy.\u003c\/p\u003e\n\n\u003ch3\u003eWho It's For\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eStubborn pigmentation:\u003c\/strong\u003e Accelerated fading support.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePre-event glow:\u003c\/strong\u003e Same-day brightness boost.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDull skin reset:\u003c\/strong\u003e Weekly maintenance.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVitamin C tolerance builders:\u003c\/strong\u003e Short contact = less irritation.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIOPE routine users:\u003c\/strong\u003e Pairs with daily vitamin C serum.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eKey Specs\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eVolume: 15g\u003c\/li\u003e\n\u003cli\u003ePrice: $68.64\u003c\/li\u003e\n\u003cli\u003eHero active: 40% vitamin C (stabilized derivative), niacinamide, peptides\u003c\/li\u003e\n\u003cli\u003eFormat: concentrated mask\u003c\/li\u003e\n\u003cli\u003eFragrance: light\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow to Use\u003c\/h3\u003e\n\u003cp\u003eAfter cleansing and toner, apply a thick layer to clean skin. Leave on 10 to 15 minutes (not longer). Rinse thoroughly with water. Follow with moisturizer. Use 1 to 2 times per week, not more. Always pair with daily SPF.\u003c\/p\u003e\n\n\u003ch3\u003eFAQ\u003c\/h3\u003e\n\n\u003ch4\u003e40% is crazy high, is it safe?\u003c\/h4\u003e\n\u003cp\u003eIn a rinse-off mask format, yes. The short contact time prevents over-exposure. In a leave-on serum, 40% would be too aggressive for most skin.\u003c\/p\u003e\n\n\u003ch4\u003eWill it sting?\u003c\/h4\u003e\n\u003cp\u003eTingling is common and normal. Strong burning is not; rinse immediately if you experience severe burning.\u003c\/p\u003e\n\n\u003ch4\u003eCan I use with other actives?\u003c\/h4\u003e\n\u003cp\u003eOn mask day, skip other strong actives (retinol, strong acids). Use simple soothing products after the mask.\u003c\/p\u003e\n\n\u003ch4\u003ePregnancy-safe?\u003c\/h4\u003e\n\u003cp\u003eGenerally yes, but the high concentration warrants consulting your OB.\u003c\/p\u003e\n\n\u003ch4\u003eHow long does 15g last?\u003c\/h4\u003e\n\u003cp\u003e2 to 3 months at 1 to 2x weekly use.\u003c\/p\u003e\n\n\u003ch3\u003eRelated Products\u003c\/h3\u003e\n\u003cp\u003ePair with \u003ca href=\"\/he\/collections\/iope\"\u003ethe IOPE collection\u003c\/a\u003e or browse Korean masks and best Korean products for dark spots.\u003c\/p\u003e\n","brand":"IOPE","offers":[{"title":"Default Title","offer_id":52944036135284,"sku":"11470874470","price":100.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0899\/8862\/8852\/files\/web_final_1_833ce88c-97d1-41a8-8932-32bca3275bad.jpg?v=1776240490","url":"https:\/\/www.mirai-skin.com\/he\/products\/iope-vitamin-c-expert-40-mask-concentrate-15g","provider":"Mirai Skin","version":"1.0","type":"link"}