#Urban decay green concealer skin#

Third, THDA seems to have all three magic abilities of pure vitamin C: it gives antioxidant protection from both UVB and UVA rays, it increases collagen synthesis (even more than AA) and it has a skin brightening effect by reducing melanogenesis by more than 80% in human melanoma cell cultures. There is also in-vitro data showing that it converts to AA in the skin. So great in fact, that it surpasses the penetration of pure vitamin C threefold at the same concentration and it penetrates successfully into the deeper layers of the skin (that is usually important to do some anti-aging work). Second, because it's oil-soluble, its skin penetration abilities seem to be great.

First, it is stable (if pH < 5), easy to formulate, and a joy to work with for a cosmetic chemist. With this context in mind let's see what THDA might be able to do. In addition, vitamin C's three magic properties (antioxidant, collagen booster, skin brightener) are all properly proven in-vivo (on real people), but for the derivatives, it's mostly in-vitro studies or in the case of THDA, it's in-vitro and done by an ingredient supplier. It's a really promising candidate (see below), but while reading all the goodness about it in a minute, do not forget that derivatives not only have to be absorbed into the skin but also have to be converted to pure vitamin C (ascorbic acid or AA) and the efficacy of the conversion is often unknown. Pentaerythrityl Tetra-Di-T-Butyl Hydroxyhydrocinnamate