[{"data":1,"prerenderedAt":262},["ShallowReactive",2],{"ingredient-thd-ascorbate":3},{"id":4,"title":5,"body":6,"category":212,"commonProducts":213,"description":219,"extension":220,"icon":221,"inciName":222,"irritantReason":223,"isCommonIrritant":224,"keyFacts":225,"localNames":235,"meta":237,"navigation":238,"path":239,"relatedArticles":240,"seo":247,"severity":248,"slug":249,"stem":250,"subtitle":251,"symptoms":252,"synonyms":258,"__hash__":261},"ingredients/learn/ingredients/thd-ascorbate.md","Tetrahexyldecyl Ascorbate (THD Ascorbate)",{"type":7,"value":8,"toc":203},"minimark",[9,14,34,41,45,52,59,66,70,96,99,133,136,140,173,177],[10,11,13],"h2",{"id":12},"what-is-thd-ascorbate","What is THD Ascorbate?",[15,16,17,21,22,25,26,29,30,33],"p",{},[18,19,20],"strong",{},"Tetrahexyldecyl ascorbate"," — usually shortened to ",[18,23,24],{},"THD ascorbate"," or sold under the trade name ",[18,27,28],{},"BV-OSC"," — is the most premium vitamin C derivative used in skincare. It's made by linking ascorbic acid to four long-chain fatty acid groups, which transforms it from a fragile, water-soluble vitamin into a ",[18,31,32],{},"stable, oil-soluble lipid-friendly molecule",". That structural change has three big consequences: it doesn't oxidize easily, it doesn't sting, and it penetrates the lipid-rich layers of the skin much better than water-soluble vitamin C forms.",[15,35,36,37,40],{},"Once inside the skin, enzymes cleave the fatty acids and release active vitamin C. The yield is good, the delivery is deep, and the sensorial experience is excellent — THD ascorbate feels silky and never tacky. The catch is ",[18,38,39],{},"price",": it's significantly more expensive than L-ascorbic acid, SAP, or MAP, which is why it shows up mainly in premium and dermatologist-led brands.",[10,42,44],{"id":43},"why-is-thd-ascorbate-so-well-tolerated","Why is THD Ascorbate so well tolerated?",[15,46,47,48,51],{},"Because THD ascorbate is formulated in ",[18,49,50],{},"anhydrous (water-free) bases at neutral pH",", it avoids both of the irritation triggers of pure L-ascorbic acid — the low pH and the water-driven oxidation. The Cosmetic Ingredient Review and European safety panels rate it safe at all cosmetic concentrations (typically 0.5–10%).",[15,53,54,55,58],{},"Patch test data show essentially no allergic contact dermatitis to THD ascorbate. Even users who have severe reactions to L-ascorbic acid serums usually tolerate THD ascorbate without issue. It's also one of the few vitamin C forms that ",[18,56,57],{},"plays well in oil and balm bases"," — useful for very dry skin, eye areas, and overnight treatments.",[15,60,61,62,65],{},"The downside is the ",[18,63,64],{},"slow onset",": clinical results take 8–12 weeks of consistent use, similar to other gentle vitamin C derivatives. THD is not a \"wake up brighter tomorrow\" ingredient; it's a long-term anti-aging investment.",[10,67,69],{"id":68},"in-indian-products","In Indian products 🇮🇳",[15,71,72,73,76,77,80,81,84,85,84,88,91,92,95],{},"THD ascorbate is the rarest and priciest vitamin C form in Indian skincare. It shows up mainly in ",[18,74,75],{},"premium and dermatologist-led ranges",": ",[18,78,79],{},"Drunk Elephant C-Firma"," (now available in India), ",[18,82,83],{},"Paula's Choice C5 Super Boost Eye Cream",", ",[18,86,87],{},"Re'equil Sebuglow",[18,89,90],{},"Brinton Skinlite Premium",", certain ",[18,93,94],{},"Foxtale luxury serums",", and a handful of high-end Indian D2C brands experimenting with it. Indian dermatologists sometimes recommend THD ascorbate specifically for patients who can't tolerate any L-ascorbic acid product.",[15,97,98],{},"Indian-context use cases:",[100,101,102,109,115,121,127],"ul",{},[103,104,105,108],"li",{},[18,106,107],{},"Highly sensitive skin"," — patients with rosacea, severe sensitivity, or barrier damage from previous treatments who still want vitamin C benefits.",[103,110,111,114],{},[18,112,113],{},"Anti-aging in mature Indian skin"," — for users in their 40s and beyond who want long-term collagen support without irritation.",[103,116,117,120],{},[18,118,119],{},"Eye-area brightening"," — THD ascorbate's stability and non-stinging profile make it the only vitamin C form most dermatologists recommend for the under-eye area.",[103,122,123,126],{},[18,124,125],{},"Premium routines"," — for users willing to invest in higher-end skincare and wanting elegant, non-tacky textures.",[103,128,129,132],{},[18,130,131],{},"Anhydrous routines"," — for users who prefer face-oil-based skincare; THD ascorbate is the one vitamin C that can be added to oil blends.",[15,134,135],{},"You won't find THD ascorbate in budget Indian brands like Mamaearth or WOW. It's a premium-tier ingredient.",[10,137,139],{"id":138},"how-to-use-thd-ascorbate-well","How to use THD Ascorbate well",[141,142,143,149,155,161,167],"ol",{},[103,144,145,148],{},[18,146,147],{},"Don't expect overnight results"," — Give it at least 8 weeks of daily use. THD ascorbate is gentle and slow.",[103,150,151,154],{},[18,152,153],{},"Use morning or evening"," — Its stability means timing is flexible. Morning gives a small antioxidant SPF boost.",[103,156,157,160],{},[18,158,159],{},"Pair with sunscreen"," — All vitamin C forms work synergistically with daily SPF for tone and damage prevention.",[103,162,163,166],{},[18,164,165],{},"Choose THD if you can't tolerate any L-ascorbic acid"," — It's the gentlest, most expensive vitamin C option, and it works for almost everyone.",[103,168,169,172],{},[18,170,171],{},"Look for it in eye creams"," — THD ascorbate is one of the few vitamin C forms safe and effective for the under-eye area.",[10,174,176],{"id":175},"safer-alternatives","Safer alternatives",[100,178,179,185,191,197],{},[103,180,181,184],{},[18,182,183],{},"For maximum potency at lower cost",": L-ascorbic acid at 10–20% is stronger, gram-for-gram, if your skin tolerates the sting.",[103,186,187,190],{},[18,188,189],{},"For water-soluble gentle alternatives",": SAP and MAP are more affordable and almost as gentle.",[103,192,193,196],{},[18,194,195],{},"For non–vitamin C brightening",": Niacinamide, alpha arbutin, and azelaic acid all fade pigmentation gently.",[103,198,199,202],{},[18,200,201],{},"For oil-based routines without THD ascorbate",": A drop of L-ascorbic acid powder mixed daily into a moisturizer is a budget alternative.",{"title":204,"searchDepth":205,"depth":205,"links":206},"",2,[207,208,209,210,211],{"id":12,"depth":205,"text":13},{"id":43,"depth":205,"text":44},{"id":68,"depth":205,"text":69},{"id":138,"depth":205,"text":139},{"id":175,"depth":205,"text":176},"antioxidant",[214,215,216,217,218],"Premium serum","Anti-aging cream","Eye cream","Anhydrous oil serum","Brightening treatment","An oil-soluble vitamin C derivative that penetrates deeper than ascorbic acid, remains stable in formulas, and avoids the sting and oxidation issues of pure vitamin C.","md","🍊","Tetrahexyldecyl Ascorbate",null,false,[226,229,232],{"label":227,"value":228},"Oil-soluble","Penetrates the skin lipid barrier better than water-soluble vitamin C forms",{"label":230,"value":231},"Highly stable","Does not turn brown or lose efficacy the way L-ascorbic acid does",{"label":233,"value":234},"Common concentration","0.5–10% in premium serums; even 3% is clinically active",[236],"टीएचडी एस्कॉर्बेट",{},true,"/learn/ingredients/thd-ascorbate",[241,244],{"slug":242,"title":243},"/learn/reading-cosmetic-labels","How to Read Cosmetic Labels",{"slug":245,"title":246},"/learn/ingredients/vitamin-c","Vitamin C (Ascorbic Acid)",{"title":5,"description":219},"low","thd-ascorbate","learn/ingredients/thd-ascorbate","The premium oil-soluble vitamin C — stable, deeply penetrating, and non-irritating",[253,254,255,256,257],"No documented allergic reactions","No stinging at any concentration","Excellent stability — does not oxidize like L-ascorbic acid","Safe for sensitive and reactive skin","Pregnancy-safe",[259,260,222,28],"THD Ascorbate","Ascorbyl Tetraisopalmitate","f1ev7tBKkDoAGFns3z59iL-0JqN9gVbzY_bT4nk2jhM",1777530818413]