{"product_id":"k-secret-seoul-1988-capsule-cream-niacinamide-5-yuja-50ml-mirai-skin-k-secret-seoul-1988-capsule-cream-niacinamide-5-yuja-50ml","title":"K-SECRET SEOUL 1988 CAPSULE CREAM : NIACINAMIDE 5% + YUJA 50ml","description":"\u003ch2\u003eK-SECRET Seoul 1988 Capsule Cream Niacinamide 5% + Yuja: Targeted Brightening at Accessible Price\u003c\/h2\u003e\n\u003cp\u003eK-SECRET's Seoul 1988 line references a historically specific era in Korean culture (the Seoul Olympics year, the beginning of modern Korean globalization) and uses this heritage positioning for a modern functional skincare line. The Capsule Cream combines 5% niacinamide (a clinically well-documented brightening concentration) with yuja citrus extract (a Korean traditional brightening fruit). At $21.00 for 50ml, the pricing is aggressively accessible for a niacinamide-forward cream. The \"Capsule\" format refers to encapsulated actives that release over time.\u003c\/p\u003e\n\u003cp\u003eYuja (also called yuzu in Japanese cuisine) is a Korean citrus fruit used traditionally in tea, honey preparations, and skincare. The fruit is high in vitamin C and polyphenols. Modern skincare extracts concentrate the brightening compounds. Combined with 5% niacinamide (the standard evidence-based concentration), this cream provides dual-mechanism brightening for pigmentation, dullness, and uneven tone.\u003c\/p\u003e\n\u003ch3\u003eWhat It Does\u003c\/h3\u003e\n\u003cp\u003eNiacinamide at 5% inhibits melanin transfer from melanocytes to keratinocytes, gradually fading hyperpigmentation and evening skin tone over 6 to 8 weeks. It also regulates sebum and reduces pore appearance. Yuja citrus provides supporting vitamin C brightening and antioxidant defense. The encapsulation technology releases actives gradually, which reduces irritation risk and extends active benefit. The cream texture is lightweight enough for layering and rich enough for daily moisturization.\u003c\/p\u003e\n\u003ch3\u003eWho It's For\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eDiffuse sun damage and dullness:\u003c\/strong\u003e Gradual brightening.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePost-inflammatory hyperpigmentation:\u003c\/strong\u003e Niacinamide fades brown marks.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOily and combination skin:\u003c\/strong\u003e Niacinamide regulates sebum.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBudget brightening routines:\u003c\/strong\u003e Accessible cream with real actives.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAll skin types (patch test sensitive first):\u003c\/strong\u003e 5% niacinamide is tolerable for most.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eKey Specs\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eVolume: 50ml\u003c\/li\u003e\n\u003cli\u003ePrice: $21.00\u003c\/li\u003e\n\u003cli\u003eHero actives: 5% niacinamide, yuja citrus extract\u003c\/li\u003e\n\u003cli\u003eTexture: light cream, absorbs quickly\u003c\/li\u003e\n\u003cli\u003eFragrance: light citrus from yuja\u003c\/li\u003e\n\u003cli\u003eUse: morning and evening\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eHow to Use\u003c\/h3\u003e\n\u003cp\u003eApply after serum as the moisturizer step. Dispense a pearl-sized amount, press onto face and neck. For pigmentation focus: apply an extra thin layer on dark spots or uneven zones. Follow with SPF in the morning; brightening routines are faster and safer paired with sun protection.\u003c\/p\u003e\n\u003cp\u003eFor intensive brightening phases: pair with a vitamin C serum morning and retinol alternating evenings, with this cream as the sealing layer.\u003c\/p\u003e\n\u003ch3\u003eFAQ\u003c\/h3\u003e\n\u003ch4\u003eIs 5% niacinamide a good concentration?\u003c\/h4\u003e\n\u003cp\u003eYes. 5% is the evidence-based concentration for brightening and sebum regulation. Higher concentrations (10% and above) can cause more irritation without dramatically better results. 5% is the sweet spot where efficacy meets tolerance.\u003c\/p\u003e\n\u003ch4\u003eWill the yuja citrus cause photosensitivity?\u003c\/h4\u003e\n\u003cp\u003eYuja extract at formulation concentrations doesn't cause meaningful photosensitivity, unlike some citrus essential oils (bergamot, for example). Standard SPF use is adequate precaution.\u003c\/p\u003e\n\u003ch4\u003eHow does this compare to Paula's Choice 10% Niacinamide Booster?\u003c\/h4\u003e\n\u003cp\u003eDifferent formats and concentrations. Paula's Choice is 10% in a serum, more aggressive and potentially more effective but also more irritating. K-SECRET is 5% in a cream, gentler and more tolerable. For aggressive brightening: Paula's Choice. For daily maintenance with better tolerance: K-SECRET.\u003c\/p\u003e\n\u003ch4\u003eCan I use this with vitamin C?\u003c\/h4\u003e\n\u003cp\u003eYes, the old myth that niacinamide neutralizes vitamin C is outdated. Modern formulations handle both fine. Layer vitamin C serum in the morning and this cream on top; or use vitamin C AM and this cream PM.\u003c\/p\u003e\n\u003ch4\u003eHow long until I see brightening?\u003c\/h4\u003e\n\u003cp\u003eDiffuse dullness: 3 to 4 weeks. Post-inflammatory marks: 6 to 10 weeks. Deep pigmentation: 12+ weeks. Consistency with SPF is key.\u003c\/p\u003e\n\u003ch3\u003eRelated Products\u003c\/h3\u003e\n\u003cp\u003ePair with K-SECRET Vita Collagen Whitening Bar for routine consistency, or layer with a vitamin C serum from the vitamin C collection.\u003c\/p\u003e\n\u003cp\u003eBrowse the full K-SECRET collection or related categories: Korean brightening products, niacinamide skincare.\u003c\/p\u003e\n","brand":"mirai-skin","offers":[{"title":"Default Title","offer_id":51741213524256,"sku":"53812908949876","price":8.4,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1004\/8333\/4432\/files\/7c4b24cf5995653250031299a5325b37.webp?v=1779696968","url":"https:\/\/usmirai-skin.com\/products\/k-secret-seoul-1988-capsule-cream-niacinamide-5-yuja-50ml-mirai-skin-k-secret-seoul-1988-capsule-cream-niacinamide-5-yuja-50ml","provider":"usmirai-skin.com","version":"1.0","type":"link"}