{"product_id":"principia-c-10-vitamin-c-serum","title":"Principia C-10 Vitamin C Serum 10% + Ferulic Acid 0.5% for Brightening \u0026 Fine Line Care, 1.01 fl oz (30 mL)","description":"\u003cdiv class=\"size-full [\u0026amp;\u0026gt;*:first-child]:mt-0 [\u0026amp;\u0026gt;*:last-child]:mb-0 space-y-2\"\u003e\n\u003cp\u003e\u003cstrong\u003ePrincipia C-10 \u003c\/strong\u003eis a Brazilian dermocosmetics serum designed to bring elegance and performance to daily skincare. With \u003cspan class=\"font-semibold\"\u003e10% vitamin C\u003c\/span\u003e paired with \u003cspan class=\"font-semibold\"\u003e0.5% ferulic acid\u003c\/span\u003e, this refined formula supports a brighter-looking complexion, smoother-looking texture, and the appearance of more even tone—while helping soften the look of fine lines.\u003c\/p\u003e\n\u003cp\u003eLightweight and easy to layer, it fits seamlessly into professional routines, salon retail selections, and international reseller catalogs that value clear active concentrations and a modern, minimalist approach.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003ch3\u003eKey Benefits\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli class=\"py-0\"\u003e\n\u003cspan class=\"font-semibold\"\u003e\u003cstrong\u003eDark spot appearance support\u003c\/strong\u003e:\u003c\/span\u003e Helps reduce the appearance of dark marks and supports a more even-looking complexion.\u003c\/li\u003e\n\u003cli class=\"py-0\"\u003e\n\u003cspan class=\"font-semibold\"\u003e\u003cstrong\u003eFine line look softening\u003c\/strong\u003e:\u003c\/span\u003e Helps smooth the appearance of fine lines for a more refined finish.\u003c\/li\u003e\n\u003cli class=\"py-0\"\u003e\n\u003cspan class=\"font-semibold\"\u003e\u003cstrong\u003eTexture refinement\u003c\/strong\u003e:\u003c\/span\u003e Helps improve the look of uneven texture for a smoother-looking surface.\u003c\/li\u003e\n\u003cli class=\"py-0\"\u003e\n\u003cspan class=\"font-semibold\"\u003e\u003cstrong\u003eUnder-eye radiance support\u003c\/strong\u003e:\u003c\/span\u003e May help improve the appearance of under-eye darkness and puffiness with consistent use.\u003c\/li\u003e\n\u003cli class=\"py-0\"\u003e\n\u003cspan class=\"font-semibold\"\u003e\u003cstrong\u003eGlow support\u003c\/strong\u003e:\u003c\/span\u003e Helps enhance the look of radiance for a fresh, luminous finish.\u003c\/li\u003e\n\u003cli class=\"py-0\"\u003e\n\u003cspan class=\"font-semibold\"\u003e\u003cstrong\u003ePore appearance support\u003c\/strong\u003e:\u003c\/span\u003e Helps reduce the look of enlarged pores over time.\u003c\/li\u003e\n\u003cli class=\"py-0\"\u003e\n\u003cspan class=\"font-semibold\"\u003e\u003cstrong\u003eDermatologically tested (brand-reported)\u003c\/strong\u003e:\u003c\/span\u003e The brand reports irritation and sensitization testing, plus hypoallergenic and non-photoirritating evaluation.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003e\u003cspan class=\"font-semibold\"\u003eHow to use\u003c\/span\u003e\u003c\/h4\u003e\n\u003cp\u003eUse daily, morning and night. Apply on clean, dry skin before creams, sunscreen, and makeup. Dispense a few drops onto fingertips (avoid touching the dropper to skin) and spread gently over the face, including the eye area if tolerated. Avoid direct contact with eyes. Store in a cool, dry place. Wear sunscreen daily.\u003c\/p\u003e\n\u003cp\u003eIn a \u003cspan class=\"font-semibold\"\u003e60-day perceived efficacy study\u003c\/span\u003e, participants reported improvements in: \u003cspan class=\"font-semibold\"\u003esoftness (100%)\u003c\/span\u003e, \u003cspan class=\"font-semibold\"\u003eglow (93%)\u003c\/span\u003e, \u003cspan class=\"font-semibold\"\u003efine lines (90%)\u003c\/span\u003e, \u003cspan class=\"font-semibold\"\u003etone (90%)\u003c\/span\u003e, \u003cspan class=\"font-semibold\"\u003epore size appearance (90%)\u003c\/span\u003e, \u003cspan class=\"font-semibold\"\u003emelasma appearance (83%)\u003c\/span\u003e, \u003cspan class=\"font-semibold\"\u003edark spots (83%)\u003c\/span\u003e, \u003cspan class=\"font-semibold\"\u003eunder-eye dark circles (80%)\u003c\/span\u003e, and \u003cspan class=\"font-semibold\"\u003eunder-eye puffiness (80%)\u003c\/span\u003e. The brand also reports comedogenicity\/acnegenicity evaluation over 60 days.\u003c\/p\u003e\n\u003ch3\u003eIngredients Highlights\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli class=\"py-0\"\u003e\n\u003cspan class=\"font-semibold\"\u003e\u003cstrong\u003eVitamin C (10%)\u003c\/strong\u003e:\u003c\/span\u003e A key antioxidant nutrient that helps protect the skin from the visible effects of oxidative stress, including those associated with sun exposure. In topical skincare, vitamin C is widely used to support a brighter look, help reduce the appearance of hyperpigmentation, and support collagen-related pathways that contribute to firmer-looking skin and smoother-looking fine lines. Vitamin C can exist in different forms; some derivatives offer improved stability and may convert on the skin.\u003c\/li\u003e\n\u003cli class=\"py-0\"\u003e\n\u003cspan class=\"font-semibold\"\u003e\u003cstrong\u003eFerulic Acid (0.5%)\u003c\/strong\u003e:\u003c\/span\u003e A plant-derived antioxidant found in seeds, leaves, and bark. Ferulic acid is valued in skincare for its antioxidant and soothing support, helping protect key skin components such as keratinocytes, fibroblasts, collagen, and elastin—making it an excellent partner ingredient in antioxidant routines.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cdiv class=\"size-full [\u0026amp;\u0026gt;*:first-child]:mt-0 [\u0026amp;\u0026gt;*:last-child]:mb-0 space-y-2\"\u003e\n\u003ch4\u003eAllergen warnings \/ cautions\u003c\/h4\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"size-full [\u0026amp;\u0026gt;*:first-child]:mt-0 [\u0026amp;\u0026gt;*:last-child]:mb-0 space-y-2\"\u003e\n\u003cul class=\"ml-1 list-outside list-disc\"\u003e\n\u003cli class=\"py-0\"\u003eFor external use only. Discontinue use if irritation occurs.\u003c\/li\u003e\n\u003cli class=\"py-0\"\u003eAvoid direct contact with eyes; rinse thoroughly if contact occurs.\u003c\/li\u003e\n\u003cli class=\"py-0\"\u003eAvoid sun exposure without protection; use broad-spectrum sunscreen daily.\u003c\/li\u003e\n\u003cli class=\"py-0\"\u003eDo not use on children.\u003c\/li\u003e\n\u003cli class=\"py-0\"\u003eStore in a cool, dry place.\u003c\/li\u003e\n\u003cli class=\"py-0\"\u003eAccording to the brand, the formula is free from parabens, petrolatum, silicones, fragrance, and gluten.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan class=\"font-semibold\"\u003ePrincipia\u003c\/span\u003e \u003c\/strong\u003eis a Brazilian \u003cstrong\u003edermocosmetics \u003c\/strong\u003ebrand founded in 2020 in São Paulo with a clear mission: \u003cspan class=\"font-semibold\"\u003edemocratize high-performance \u003cstrong\u003eskincare\u003c\/strong\u003e\u003c\/span\u003e\u003cstrong\u003e \u003c\/strong\u003ethrough science-backed formulas, radical ingredient transparency, and fair, accessible positioning. Instead of relying on hype, Principia focuses on what matters most for results-driven routines—\u003cstrong\u003e\u003cspan class=\"font-semibold\"\u003eactive ingredients at disclosed percentages\u003c\/span\u003e, straightforward formulations, and a minimalist, clinical aesthetic designed for everyday use.\u003c\/strong\u003e\u003c\/p\u003e\n\u003ch3\u003eFAQ\u003c\/h3\u003e\n\u003cdiv class=\"size-full [\u0026amp;\u0026gt;*:first-child]:mt-0 [\u0026amp;\u0026gt;*:last-child]:mb-0 space-y-2\"\u003e\n\u003cdiv class=\"size-full [\u0026amp;\u0026gt;*:first-child]:mt-0 [\u0026amp;\u0026gt;*:last-child]:mb-0 space-y-2\"\u003e\n\u003cdiv class=\"size-full [\u0026amp;\u0026gt;*:first-child]:mt-0 [\u0026amp;\u0026gt;*:last-child]:mb-0 space-y-2\"\u003e\n\u003cdiv class=\"size-full [\u0026amp;\u0026gt;*:first-child]:mt-0 [\u0026amp;\u0026gt;*:last-child]:mb-0 space-y-2\"\u003e\n\u003cdiv class=\"size-full [\u0026amp;\u0026gt;*:first-child]:mt-0 [\u0026amp;\u0026gt;*:last-child]:mb-0 space-y-2\"\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan class=\"font-semibold\"\u003eCan I use Principia C-10 every day?\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eYes. The brand indicates daily AM\/PM use. If your skin is sensitive, start once daily and increase as tolerated.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"size-full [\u0026amp;\u0026gt;*:first-child]:mt-0 [\u0026amp;\u0026gt;*:last-child]:mb-0 space-y-2\"\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan class=\"font-semibold\"\u003eDo I need sunscreen when using vitamin C?\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eYes. Daily broad-spectrum sunscreen helps protect the look of results and supports a more even-looking tone.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"size-full [\u0026amp;\u0026gt;*:first-child]:mt-0 [\u0026amp;\u0026gt;*:last-child]:mb-0 space-y-2\"\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan class=\"font-semibold\"\u003eCan this serum help with the look of dark spots and uneven tone?\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eIt may help improve the appearance of dark marks and tone irregularities with consistent use, alongside sun protection.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"size-full [\u0026amp;\u0026gt;*:first-child]:mt-0 [\u0026amp;\u0026gt;*:last-child]:mb-0 space-y-2\"\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan class=\"font-semibold\"\u003eCan I apply it around the eye area?\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe brand indicates safety and efficacy were evaluated for the eye area. Apply gently and avoid direct contact with eyes.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"size-full [\u0026amp;\u0026gt;*:first-child]:mt-0 [\u0026amp;\u0026gt;*:last-child]:mb-0 space-y-2\"\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan class=\"font-semibold\"\u003eWill it cause visible peeling?\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe brand indicates it generally does not cause visible peeling. If irritation occurs, reduce frequency and support with a moisturizer.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"size-full [\u0026amp;\u0026gt;*:first-child]:mt-0 [\u0026amp;\u0026gt;*:last-child]:mb-0 space-y-2\"\u003e\n\u003cp\u003eComplete your routine by exploring \u003cspan class=\"text-gray-500\" title=\"Blocked URL: {{INTERNAL_LINK}}\"\u003eour curated \u003ca href=\"https:\/\/mkpbr.com\/collections\/principia\"\u003ePrincipia Collection\u003c\/a\u003e\u003c\/span\u003e for a clean, balanced, everyday glow.\u003c\/p\u003e\n\u003ch3\u003eAdd Principia C-10 to your cart and elevate your skincare ritual with Brazilian dermocosmetic radiance.\u003c\/h3\u003e\n\n\n\u003c\/div\u003e\n\u003cdiv style=\"margin-top: 18px; background: #F6F7FB; border: 1px solid #E7E9F3; border-radius: 14px; padding: 12px; color: rgba(20,32,62,.74); font-size: 12.5px; line-height: 1.6; max-width: 100%; box-sizing: border-box; overflow: hidden;\"\u003e\n\u003cstrong style=\"color: #14203e;\"\u003eDisclaimer:\u003c\/strong\u003e For external use only. Patch test before use and discontinue use if irritation occurs. Individual results may vary. Product packaging may be labeled in Portuguese. Our Brazilian-brand products are sourced in Brazil and are regularized with ANVISA (Agência Nacional de Vigilância Sanitária), Brazil's national health authority, under the applicable regulatory framework for each product category. ANVISA regularization applies to the Brazilian market and is not equivalent to U.S. FDA approval. See our full \u003ca href=\"\/en-cz\/pages\/disclaimers\" style=\"color: rgba(20,32,62,.74); text-decoration: underline;\"\u003eDisclaimers \u0026amp; Important Information\u003c\/a\u003e.\u003c\/div\u003e","brand":"Principia","offers":[{"title":"Default Title","offer_id":52626228379964,"sku":"MKPBR2024-1972","price":1024.48,"currency_code":"CZK","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0090\/2840\/3278\/files\/principia-c-10-vitamin-c-serum-10-percent-ferulic-acid-0-5-percent-1-01-fl-oz-30-ml-front-bottle-buy-now-at-mkpbr-com-worldwide-shipping_46546b1d-04b5-481f-8edb-6bd017ebc14f.png?v=1784527155","url":"https:\/\/mkpbr.com\/en-cz\/products\/principia-c-10-vitamin-c-serum","provider":"MKPBR - Shine Like a Brazilian","version":"1.0","type":"link"}