The INKEY List Polyglutamic Acid Hydrating Serum Versus The INKEY List Ectoin Hydro-Barrier Serum

The INKEY List Polyglutamic Acid Hydrating Serum Versus The INKEY List Ectoin Hydro-Barrier Serum Detailed comparison of The INKEY List Polyglutamic Acid Hydrating Serum versus The INKEY List Ectoin Hydro-Barrier Serum. This hydrating serum is formulated around Polyglutamic Acid to hydrate skin and strengthen the skin barrier. This barrier-repair serum is formulated around Ectoin and Panthenol to strengthen the skin barrier and hydrate skin. No key ingredients Water Dimethicone Butylene Glycol Bis-PEG-12 Dimethicone Glycerin Polymethylsilsesquioxane Polysilicone-11 Phenoxyethanol Polyglutamic Acid Sodium Acrylate/Sodium Acryloyldimethyl Taurate Copolymer Isohexadecane Propanediol Coco-Glucoside Sodium Benzoate Hydroxyethylcellulose Polysorbate 80 Ethylhexylglycerin Potassium Sorbate Decyl Glucoside Dimethylacrylamide/Acrylic Acid/Polystyrene Ethyl Methacrylate Copolymer Sorbitan Oleate Trisodium Ethylenediamine Disuccinate Caprylyl Glycol Hexylene Glycol Oryza Sativa Bran Extract Water, Dimethicone, Butylene Glycol, Bis-PEG-12 Dimethicone, Glycerin, Polymethylsilsesquioxane, Polysilicone-11, Phenoxyethanol, Polyglutamic Acid, Sodium Acrylate/Sodium Acryloyldimethyl Taurate Copolymer, Isohexadecane, Propanediol, Coco-Glucoside, Sodium Benzoate, Hydroxyethylcellulose, Polysorbate 80, Ethylhexylglycerin, Potassium Sorbate, Decyl Glucoside, Dimethylacrylamide/Acrylic Acid/Polystyrene Ethyl Methacrylate Copolymer, Sorbitan Oleate, Trisodium Ethylenediamine Disuccinate, Caprylyl Glycol, Hexylene Glycol, Oryza Sativa Bran Extract Caprylic/Capric Triglyceride Coconut Alkanes Ectoin 2% Hydrolyzed Sodium Hyaluronate Sodium Hyaluronate Maltodextrin Sodium Stearoyl Glutamate Panthenol Cetearyl Alcohol Sclerotium Gum Xanthan Gum Glyceryl Stearate Jojoba Esters Coco-Caprylate/Caprate Sodium Citrate Helianthus Annuus Seed Wax Citric Acid Polyglyceryl-10 Stearate Avena Sativa Kernel Extract Leuconostoc/Radish Root Ferment Filtrate Triethyl Citrate Pentylene Glycol Polyglyceryl-6 Behenate Sodium Hyaluronate Crosspolymer Ceramide NP Hyaluronic Acid Ceramide AP Cholesterol Phytosphingosine Behenic Acid Sodium Levulinate Polyglycerin-3 Sodium Cetearyl Sulfate Ceramide EOP Water, Propanediol, Caprylic/Capric Triglyceride, Coconut Alkanes, Ectoin 2%, Hydrolyzed Sodium Hyaluronate, Sodium Hyaluronate, Maltodextrin, Phenoxyethanol, Sodium Stearoyl Glutamate, Panthenol, Cetearyl Alcohol, Sclerotium Gum, Xanthan Gum, Glyceryl Stearate, Jojoba Esters, Coco-Caprylate/Caprate, Ethylhexylglycerin, Sodium Citrate, Helianthus Annuus Seed Wax, Citric Acid, Polyglyceryl-10 Stearate, Avena Sativa Kernel Extract, Glycerin, Leuconostoc/Radish Root Ferment Filtrate, Triethyl Citrate, Pentylene Glycol, Polyglyceryl-6 Behenate, Sodium Hyaluronate Crosspolymer, Ceramide NP, Hyaluronic Acid, Ceramide AP, Cholesterol, Phytosphingosine, Behenic Acid, Sodium Levulinate, Polyglycerin-3, Potassium Sorbate, Sodium Cetearyl Sulfate, Ceramide EOP These ingredients are found in both products. Ingredients higher up in an ingredient list are typically present in a larger amount. Ethylhexylglycerin is created from glycerin. It is a multitasker ingredient that: The CIR Expert Panel found minimal skin absorption or sensitization of any kind in a safety assessment. Though this ingredient is considered well-tolerated, a small number of cases of allergic dermatitis have been published since 2002. Just be sure to patch test if you are unsure. Industry-reported use ranges from 8% in rinse-off products and 2% in leave-on formulations. Glycerin (or glycerol) is a compound naturally found in your skin. It's a powerhouse humectant that pulls water into the stratum corneum. Topically, glycerin does several things at once: Your skin makes glycerin on its own (mostly from sebaceous oil breakdown) and shuttles it to your outermost layer of skin, or your epidermis, via aquaporin-3. Aquaporin-3 is a transporter that is essential for normal skin hydration, elasticity, and repair. Interestingly, mice lacking in AQP3 have dry and less elastic skin that can be fully corrected with glycerin. This ingredient is non-irritating, plays well with almost every ingredient, and works across all skin types. Typical use is anywhere between 3-10% but can go up to 79% in some leave-on products. Just know very high concentrations (>40%) can feel tacky in low humidity. Glycerin is the name for this ingredient in American English. British English uses Glycerol/Glycerine. Phenoxyethanol is one of the most widely used preservatives in skincare (and for good reason!). It has a large spectrum of antimicrobial activity and especially effective bacteria, yeast, and mold while only having a weak effect on your skin's natural microbiome. On a cellular level, it disrupts the cell membranes of microbes by poking holes that make the cell leak. This shuts down the chemical reactions the microbe needs to make energy so it can no longer survive. Another perk of this ingredient is that it stays functional across a wide pH range (3-10). You'll often see it paired with boosters like Ethylhexylglycerin; one study showed that a 1:9 ratio of Ethylhexylglycerin to Phenoxyethanol damages bacterial membranes as effectively as doubling the Phenoxyethanol concentration on its own. Typical use concentrations range from 0.3-1% depending on the formula, and this ingredient is capped at 1% int the EU. Safety-wise, the fear mongering does not hold up to the evidence. The EU's Scientific Committee on Consumer Safety and FDA consider it safe as a preservative at up to 1%, including for children of all ages. Adverse systemic effects only showed up in animal studies at exposures roughly 200x higher than what people get from cosmetics. And despite its very widespread use, this ingredient is a rare sensitizer and allergic reactions are uncommon. Potassium Sorbate is a preservative used to prevent yeast and mold in products. It is commonly found in both cosmetic an