grace & stella Hyaluronic Acid Serum

grace & stella Hyaluronic Acid Serum grace & stella Hyaluronic Acid Serum ingredients explained: Water/Eau/Aqua, Sodium Hyaluronate, Sodium Hyaluronate Crosspolymer, Panthenol, Ahnfeltia Concinna Extract, Glycerin, Pentylene Glycol, Propanediol, Polyacrylate Crosspolymer-6, Hexylene Glycol, Caprylyl Glycol, PPG-26-Buteth-26, PEG-40 Hydrogenated Castor Oil, Trisodium Ethylenediamine Disuccinate, Citric Acid, Ethylhexylglycerin, Chlorphenesin, Hyaluronic Acid, Ethoxydiglycol, Phenoxyethanol, Potassium Sorbate Show all ingredients by function Water/Eau/Aqua solvent Sodium Hyaluronate skin-identical ingredient, moisturizer/​humectant 0, 0 goodie Sodium Hyaluronate Crosspolymer skin-identical ingredient, antioxidant, moisturizer/​humectant Panthenol soothing, moisturizer/​humectant Ahnfeltia Concinna Extract viscosity controlling Glycerin superstar Pentylene Glycol solvent, moisturizer/​humectant Propanediol Polyacrylate Crosspolymer-6 Hexylene Glycol solvent, emulsifying, perfuming, surfactant/​cleansing 0-1, 0-2 Caprylyl Glycol moisturizer/​humectant, emollient PPG-26-Buteth-26 PEG-40 Hydrogenated Castor Oil emulsifying, surfactant/​cleansing Trisodium Ethylenediamine Disuccinate chelating Citric Acid buffering Ethylhexylglycerin preservative Chlorphenesin preservative, antimicrobial/​antibacterial Hyaluronic Acid Ethoxydiglycol solvent, moisturizer/​humectant, perfuming Phenoxyethanol Potassium Sorbate 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. 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 topic at hyaluronic acid (including penetration-questions, differences between high and low molecular weight versions and a bunch of references to scientific literature). It's a special "cross-linked" from of IT-moisturizer, hyaluronic acid (HA). Cross-linked means that "normal" HA pieces (1-2 million Da molecular weight) are chemically bound togeather to create a big, "infinite" mesh. The special HA mesh has a remarkable water-binding capacity, 5 times more than the already crazy water-binding capacity of "normal" HA. This water filled crosslinked HA gel forms a smooth film on the skin and continuously delivers the bound water, so it gives long-term moisturizing benefits. Btw, crosslinking HA was developed for dermal fillers (as crosslinking helps their longevity), and this guy what‑it‑does skin-identical ingredient | moisturizer/humectant irritancy, com. skin-identical ingredient | antioxidant | moisturizer/humectant soothing | moisturizer/humectant solvent | moisturizer/humectant solvent | emulsifying | perfuming | surfactant/cleansing moisturizer/humectant | emollient emulsifying | surfactant/cleansing preservative | antimicrobial/antibacterial solvent | moisturizer/humectant | perfuming

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