REPLENIX Pure Hydration Hyaluronic Acid Serum

REPLENIX Pure Hydration Hyaluronic Acid Serum REPLENIX Pure Hydration Hyaluronic Acid Serum ingredients explained: Purified Water, Glycerin, Sodium PCA, Sodium Hyaluronate, Hydrolyzed Sodium Hyaluronate, Camellia Sinensis (White Tea) Extract, Palmitoyl Tripeptide-28, Ergothioneine, Glutathione, Zinc Pca, Copper Pca, Phenoxyethanol, Disodium EDTA Show all ingredients by function Purified Water solvent Glycerin skin-identical ingredient, moisturizer/​humectant 0, 0 superstar Sodium PCA goodie Sodium Hyaluronate Hydrolyzed Sodium Hyaluronate moisturizer/​humectant Camellia Sinensis (White Tea) Extract antioxidant, soothing Palmitoyl Tripeptide-28 cell-communicating ingredient Ergothioneine antioxidant Glutathione Zinc Pca anti-acne, moisturizer/​humectant Copper Pca Phenoxyethanol preservative Disodium EDTA chelating Good old water, aka H2O. The most common skincare ingredient of all. You can usually find it right in the very first spot of the ingredient list, meaning it’s the biggest thing out of all the stuff that makes up the product. It’s mainly a solvent for ingredients that do not like to dissolve in oils but rather in water. Expand to read more Once inside the skin, it hydrates, but not from the outside - putting pure water on the skin (hello long baths!) is drying. One more thing: the water used in cosmetics is purified and deionized (it means that almost all of the mineral ions inside it is removed). Like this, the products can stay more stable over time. A natural moisturizer that’s also in our skin A super common, safe, effective and cheap molecule used for more than 50 years Not only a simple moisturizer but knows much more: keeps the skin lipids between our skin cells in a healthy (liquid crystal) state, protects against irritation, helps to restore barrier Effective from as low as 3% with even more benefits for dry skin at higher concentrations up to 20-40% High-glycerin moisturizers are awesome for treating severely dry skin PCA stands for Pyrrolidone Carboxylic Acid and though it might not sound like it, it is a thing that can be found naturally in our skin. The sodium salt form of PCA is an important skin-identical ingredient and great natural moisturizer that helps the skin to hold onto water and stay nicely hydrated. It’s the - sodium form - cousin of the famous NMF, hyaluronic acid (HA). If HA does not tell you anything we have a super detailed, geeky explanation about it here. The TL; DR version of HA is that it's a huge polymer (big molecule from repeated subunits) found in the skin that acts as a sponge helping the skin to hold onto water, being plump and elastic. HA is famous for its crazy water holding capacity as it can bind up to 1000 times its own weight in water. As far as skincare goes, sodium hyaluronate and hyaluronic acid are pretty much the same and the two names are used interchangeably. As cosmetic chemist kindofstephen writes on reddit "sodium hyaluronate disassociates into hyaluronic acid molecule and a sodium atom in solution". In spite of this, if you search for "hyaluronic acid vs sodium hyaluronate" you will find on multiple places that sodium hyaluronate is smaller and can penetrate the skin better. Chemically, this is definitely not true, as the two forms are almost the same, both are polymers and the subunits can be repeated in both forms as much as you like. (We also checked Prospector for sodium hyaluronate versions actually used in cosmetic products and found that the most common molecular weight was 1.5-1.8 million Da that absolutely counts as high molecular weight). What seems to be a true difference, though, is that the salt form is more stable, easier to formulate and cheaper so it pops up more often on the ingredient lists. If you wanna become a real HA-and-the-skin expert you can read way more about the to what‑it‑does skin-identical ingredient | moisturizer/humectant irritancy, com. moisturizer/humectant antioxidant | soothing anti-acne | moisturizer/humectant

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