Use only as directed on unbroken skin. Sorry for my bad English but I’m from Belgium where we speak Dutch and French.Hi Sven, most of the research points to 3% THD being sufficient for collagen synthesis and for the numerous other benefits that this vitamin C derivative offers. Do you know this product and can you tell me if I need to pay this much for AT serum or is something like say from Ordinary is fine.Alicia, AT may be more expensive than other forms of Vitamin C but there’s no reason to pay that much. Oristar THA. It doesn’t require such an acidic pH as ascorbic acid to work so you can mix them safely.Adina, they’re both oil-soluble forms of vitamin C, so maybe that’s where the confusion comes from! We stick to our enterprise spirit of "Quality, Performance, Innovation and Integrity". Vitamin C tetra-isopalmitate. You can safely use this vitamin C derivative with retinol in squalane. These energy factories are absolutely vital for cell regeneration and repair.This content is not intended to replace conventional medical treatment. I bought mine from lotioncrafter.Jasmine, thanks for sharing. Patch testing prior to use is advised. In effect, the best case is that you may have a product that is not so effective and the worse case is that the oxidation creates free radicals that are actually damaging to the skin. 20.0% | Ascorbyl Tetraisopalmitate Solution 20% In Vitamin F 3.0% | Refreshing Brightening Serum (2020) Please use in the order listed.You are welcome Sophie and please keep us informed if you can.I am a bit underwhelmed. l-ascorbic acid, tetrakis(2-hexyldecanoate) EC 430-110-8. You’ll have to try both to find out which one your skin likes best.can you combine Ascorbyl Tetraisopalmitate Solution like Ordinary with a pure Roehip Oil?I’ve just ordered the (new?) I know some experts claim they do, but they haven’t been able to provide convincing proof yet.Hi, I'm Gio! They have a vitamin c serum with AT and costs 199.00. By providing your email, you expressly consent to receiving electronic communications from DECIEM Inc. You may withdraw consent at anytime.Please refer to our By continuing to use our sites, you consent to the use of cookies, including third party ones,and other technologies used for statistical and analytical purposes. assessment. In fact, it penetrates the skin faster and deeper than any other form of vitamin C.So if it penetrates both layers of the skin, does this make it more effective? Using water soluble vitamin C serums containing L-AA can be an issue since this nutrient cannot make it through the oil barrier and therefore cannot provide maximum benefits as far as collagen manufacture is concerned.To overcome this, some formulators use very high strengths of L-ascorbic acid (including us) so that at least some of this vitamin will be delivered to the dermis, however this can still be a problem and we are aware of this. So now, you know that Vitamin C is great and all, but it's really unstable and gives cosmetics companies many headaches. Studies have shown it It’s the other side of the coin: if Ascorbyl Tetraisopalmitate can penetrate skin more deeply and deliver a more powerful dose of Vitamin C, it makes sense it’s also more likley to irritate your skin.If your skin is pretty resilient or used to Vitamin C, I wouldn’t worry. That’s why anything water-based needs the helping hand of a good delivery system to penetrate your skin.Ascorbyl Tetraisopalmitate is soluble in oil so it easily slips into the skin.Like all forms of vitamin C, Ascorbyl Tetraisopalmitate:Basically, it does what other forms of Vitamin C do. I am looking for a new facial regime due to recently developing rosacea during the menopause. No derivative is as effective as LAA. I use Retinol in the evening (Medik8 Retinol 3TR) in the evening. Its very sensitive and I am struggling to find a moisturiser as I cannot tolerate aloe vera, which is in alot of good products that might otherwise be suitable.