{"product_id":"advanced-thd-vitamin-c-serum","title":"Advanced THD Vitamin C Serum","description":"\u003cp class=\"font-claude-response-body break-words whitespace-normal\"\u003eStable daily Vitamin C. Water-free formula. No irritation. No compromise.\u003c\/p\u003e\n\u003chr class=\"border-border-200 border-t-0.5 my-3 mx-1.5\"\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\"\u003e\u003cstrong\u003eReal Results. Real People. 8 Weeks.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\"\u003e\u003cem\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1030\/6574\/7798\/files\/Week_8_Dale.webp?v=1781728704\" alt=\"\"\u003e\u003c\/em\u003e\u003cbr\u003e\u003cem\u003eDale · Advanced THD Vitamin C Serum · Week 6 · No filters\u003c\/em\u003e\u003c\/p\u003e\n\u003chr class=\"border-border-200 border-t-0.5 my-3 mx-1.5\"\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\"\u003e\u003cstrong\u003eTrial Results\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\"\u003e8-week independent trial\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1030\/6574\/7798\/files\/Stats.png?v=1781729272\" alt=\"\"\u003e\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1030\/6574\/7798\/files\/Stats_2.png?v=1781729742\" alt=\"\"\u003e\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\"\u003e \u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\"\u003e \u003c\/p\u003e\n\u003chr class=\"border-border-200 border-t-0.5 my-3 mx-1.5\"\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\"\u003e\u003cstrong\u003eWhat This Serum Does\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\"\u003eThe Advanced THD Vitamin C Serum delivers stable, oil-soluble Vitamin C deep into the skin's lipid layers — where it converts to active Vitamin C and gets to work supporting collagen, evening skin tone and improving overall skin quality over time.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\"\u003eUnlike traditional Vitamin C serums, it does not oxidise, does not irritate and does not turn orange in the bottle. It absorbs quickly, leaves no greasy residue and works consistently — every single day.\u003c\/p\u003e\n\u003chr class=\"border-border-200 border-t-0.5 my-3 mx-1.5\"\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\"\u003e\u003cstrong\u003eWhat Our Trial Participants Said\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\"\u003e\u003cem\u003e\"Reduced sunspots, skin feels smoother. Very happy — easy to use, and some visible results.\"\u003c\/em\u003e\u003cbr\u003e\u003cstrong\u003eDale\u003c\/strong\u003e\u003cbr\u003eAdvanced THD Vitamin C Serum · Week 6 (still using at Week 10)\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\"\u003e\u003cem\u003e\"Brighter and smoother — my skin tone is so much more even and calmer. The redness I'd had for years just settled down.\"\u003c\/em\u003e\u003cbr\u003e\u003cstrong\u003eWendy\u003c\/strong\u003e\u003cbr\u003eAdvanced THD Vitamin C Serum · 8 weeks\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\"\u003e\u003cem\u003e\"Skin feels smoother and my lines feel less pronounced. Skin tone feels better.\"\u003c\/em\u003e\u003cbr\u003e\u003cstrong\u003eJude\u003c\/strong\u003e\u003cbr\u003eAdvanced THD Vitamin C Serum · 8 weeks\u003c\/p\u003e\n\u003chr class=\"border-border-200 border-t-0.5 my-3 mx-1.5\"\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\"\u003e\u003cstrong\u003eWHAT YOUR SKIN WILL FEEL\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul class=\"[li_\u0026amp;]:mb-0 [li_\u0026amp;]:mt-1 [li_\u0026amp;]:gap-1 [\u0026amp;:not(:last-child)_ul]:pb-1 [\u0026amp;:not(:last-child)_ol]:pb-1 list-disc flex flex-col gap-1 pl-8 mb-3\"\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eBrighter, more even skin tone with consistent use\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eSmoother skin texture from the first few weeks\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eSofter appearance of fine lines over time\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eReduced redness and a calmer, more settled complexion\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eDaily antioxidant protection against environmental stressors\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eConfident that your Vitamin C is stable, clean and working every day\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr class=\"border-border-200 border-t-0.5 my-3 mx-1.5\"\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\"\u003e\u003cstrong\u003eTHIS IS FOR YOU IF:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul class=\"[li_\u0026amp;]:mb-0 [li_\u0026amp;]:mt-1 [li_\u0026amp;]:gap-1 [\u0026amp;:not(:last-child)_ul]:pb-1 [\u0026amp;:not(:last-child)_ol]:pb-1 list-disc flex flex-col gap-1 pl-8 mb-3\"\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eYou want Vitamin C that doesn't degrade before it reaches your skin\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eYour skin is sensitive and previous Vitamin C serums have caused irritation\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eYou care deeply about what goes on your skin and won't compromise on ingredients\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eYou want visible results without aggressive formulations\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eYou're ready to commit to a clean, clinical daily Vitamin C that builds results over time\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr class=\"border-border-200 border-t-0.5 my-3 mx-1.5\"\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\"\u003e\u003cstrong\u003eWHY THD OVER TRADITIONAL VITAMIN C?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\"\u003eL-Ascorbic Acid is the most extensively studied form of Vitamin C in skincare — but it is notoriously unstable in water-based formulas. The moment it is mixed with water, it begins to oxidise and lose potency. Many serums are already significantly degraded by the time they reach your skin.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\"\u003eTetrahexyldecyl Ascorbate (THD) solves this. It is oil-soluble, highly stable and able to penetrate into the skin's lipid layers — where it converts to active Vitamin C and delivers the same skin benefits as L-Ascorbic Acid without the instability and irritation.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\"\u003eNo degradation. No irritation. No orange residue. Just stable, active Vitamin C — every day.\u003c\/p\u003e","brand":"Intrinsic Skincare UK","offers":[{"title":"Default Title","offer_id":54258796265814,"sku":null,"price":32.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1030\/6574\/7798\/files\/VitC4.jpg?v=1781898638","url":"https:\/\/www.intrinsicshop.co.uk\/products\/advanced-thd-vitamin-c-serum","provider":"Intrinsic Skincare UK","version":"1.0","type":"link"}