Nars matte concealer8/17/2023 ![]() The disadvantage of Titanium Dioxide is that it's not cosmetically elegant, meaning it's a white, "unspreadable" mess. Regular sized Titanium Dioxide also has a great safety profile, it's non-irritating and is pretty much free from any health concerns (like estrogenic effect worries with some chemical filters). Its protection is very good between 290 - 350 nm (UVB and UVA II range), and less good at 350-400 nm (UVA I) range. If possible use it at night, just to be on the safe side.Īnyway, it doesn't matter if it reflects or absorbs, Titanium Dioxide is a pretty awesome sunscreen agent for two main reasons: it gives a nice broad spectrum coverage and it's highly stable. However, if you use a product that you like and it also contains RP, there is no reason to throw it away. We would add especially during the day!īottom line: If you wanna get serious about retinoids, RP is not your ingredient ( retinol or tretinoin is!). Nor, I’m afraid, are there any good reasons to recommend the use of RP". ![]() Baumann's conclusion: " sufficient evidence to establish a causal link between RP and skin cancer has not been produced. We think that the truth lies somewhere in the middle, and we agree with Dr. ![]() It seems that there is a study showing RP being photo protective against UVB rays but there is also a study showing RP causing DNA damage and cytotoxicity in association with UVA. Leslie Baumann wrote a great review of the debate and summarized the research available about retinyl palmitate here. Wang, MD, director of dermatologic surgery at Memorial-Sloan Kettering Cancer Centre.ĭr. It also exibits questionable behaviour in the presence of UV light and was the center of a debate between the non-profit group, EWG (whose intentions are no doubt good, but its credibility is often questioned by scientists) and a group of scientists and dermatologists lead by Steven Q. What's more, the anti-aging effectiveness is not the only questionable thing about RP. Leslie Baumann in her fantastic Cosmetic Dermatology book writes that RP is topically ineffective. The evidence that RP is still an effective anti-aging ingredient is not very strong, in fact, it's weak. Retinyl palmitate -> retinol - > retinaldehyde -> all-trans-retinoic acidĪs we wrote in our lengthy retinol description the problem is that the conversion is not terribly effective. It's definitely one of the best, or probably even the best option out there for sun protection available worldwide. This seems to be true even if the skin is damaged, for example, sunburnt.Īll in all, if you've found a Zinc Oxide sunscreen that you are happy to use every single day, that's fantastic and we suggest you stick with it. But luckily, so far research shows that sunscreen nanoparticles are not absorbed but remain on the surface of the skin or in the uppermost (dead) layer of the skin. We wrote more about nanoparticles and the concerns around them here, but the gist is that if nanoparticles were absorbed into the skin that would be a reason for legitimate health concerns. Still, it's white and disturbing enough to use Zinc Oxide nanoparticles more and more often. Pinnell, it's slightly less white than TiO2. It leaves a disturbing whitish tint on the skin, although, according to a 2000 research paper by Dr. ![]() It's also often used to treat skin irritations such as diaper rash.Īs for the disadvantages, Zinc Oxide is also not cosmetically elegant. So much so that Zinc Oxide also counts as a skin protectant and anti-irritant. It's also highly stable and non-irritating. It protects against UVB, UVA II, and UVA I almost uniformly, and is considered to be the broadest range sunscreen available today. The first main difference is that while TiO2 gives a nice broad spectrum protection, Zinc Oxide has an even nicer and even broader spectrum protection. Microcrystalline Wax,Cera Microcristallina,Cire Microcristalline
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