Do we have a pure vitamin C serum that doesn't oxidize after 2 months?
1. Ascorbyl Palmitate is an antioxidant, Ascorbyl Palmitate is one of the most stable forms of vitamin C, oil soluble, and non-acid, it is much more stable than the water-soluble form of vitamin C, L- ascorbic acid.
-Antioxidants, Anna Wypych, George Wypych, in Databook of Antioxidants, 2020
2. It is an amphipathic molecule, meaning one end is water-soluble and the other end is fat-soluble. This dual solubility allows it to be incorporated into cell membranes. When incorporated into the cell membranes of human red blood cells, ascorbyl palmitate has been found to protect them from oxidative damage and to protect α-tocopherol (a fat-soluble antioxidant) from oxidation by free radicals
-Cort, W.M. Antioxidant activity of tocopherols, ascorbyl palmitate, and ascorbic acid and their mode of action. Journal of the American Oil Chemists’ Society. 1974; volume 51: pages 321-325.
3. 4.4.1 Ascorbyl Palmitate
Ascorbyl Palmitate is a highly bio available, fat-soluble form of ascorbic acid (vitamin C) and possesses all the properties of native water-soluble counterpart, that is vitamin C. It is a potent antioxidant in protecting lipids from peroxidation and is a free radical scavenger.
-What nano-crystals can offer to cosmetic and dermal formulations, Ranjita Shegokar, in Nano biomaterials in Galenic Formulations and Cosmetics, 2016
4. Antioxidants are responsible for the chain-breaking of radical scavengers and for inhibiting the oxidation reaction; by these mechanisms, antioxidants can prevent oxidative damage [56, 57]. In cosmetic preparations, antioxidants have two functions, that is, as the active ingredients and as protectors of other ingredients against oxidation.
The stability of ascorbyl palmitate and vitamins K and A in cosmetics can be enhanced by using lipid nano carriers. Phytosomes of green tea and grape seed can improve their free radical scavenging and UV protection activity.
-Natural Antioxidants in Cosmetics, Idha Kusumawati, Gunawan Indrayanto, in Studies in Natural Products Chemistry, 2013
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