Kiehl's Ultra Pure High-Potency 1.5% Hyaluronic Acid Serum Versus Avène Hydrance INTENSE Rehydrating Serum

Kiehl's Ultra Pure High-Potency 1.5% Hyaluronic Acid Serum Versus Avène Hydrance INTENSE Rehydrating Serum Detailed comparison of Kiehl's Ultra Pure High-Potency 1.5% Hyaluronic Acid Serum versus Avène Hydrance INTENSE Rehydrating Serum. This hydrating serum is formulated around Sodium Hyaluronate to hydrate skin and strengthen the skin barrier. This hydrating serum is formulated around Caprylic/Capric Triglyceride and Beta-Sitosterol to hydrate skin and strengthen the skin barrier. Water Glycerin Sodium Hyaluronate Phenoxyethanol Chlorphenesin Tetrasodium Glutamate Diacetate Citric Acid Water, Glycerin, Sodium Hyaluronate, Phenoxyethanol, Chlorphenesin, Tetrasodium Glutamate Diacetate, Citric Acid Caprylic/Capric Triglyceride Isocetyl Stearoyl Stearate Triethylhexanoin 1,2-Hexanediol Hydrogenated Starch Hydrolysate Methyl Gluceth-20 Benzoic Acid Beta-Sitosterol C12-20 Alkyl Glucoside C14-22 Alcohols Carbomer Disodium EDTA Parfum Polyglyceryl-10 Myristate Sodium Hydroxide Tocopheryl Acetate Water, Caprylic/Capric Triglyceride, Isocetyl Stearoyl Stearate, Triethylhexanoin, Glycerin, 1,2-Hexanediol, Hydrogenated Starch Hydrolysate, Methyl Gluceth-20, Benzoic Acid, Beta-Sitosterol, C12-20 Alkyl Glucoside, C14-22 Alcohols, Carbomer, Disodium EDTA, Parfum, Polyglyceryl-10 Myristate, Sodium Hydroxide, Tocopheryl Acetate These ingredients are found in both products. Ingredients higher up in an ingredient list are typically present in a larger amount. 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. Water. It's the most common cosmetic ingredient of all. You'll usually see it at the top of ingredient lists, meaning that it makes up the largest part of the product. So why is it so popular? Water most often acts as a solvent - this means that it helps dissolve other ingredients into the formulation. You'll also recognize water as that liquid we all need to stay alive. If you see this, drink a glass of water. Remember to stay hydrated!