Neutrogena Hydro Boost Hyaluronic Acid Serum Versus Kiehl's Ultra Facial Oil-Free Gel Cream

Neutrogena Hydro Boost Hyaluronic Acid Serum Versus Kiehl's Ultra Facial Oil-Free Gel Cream Detailed comparison of Neutrogena Hydro Boost Hyaluronic Acid Serum US versus Kiehl's Ultra Facial Oil-Free Gel Cream. This hydrating serum is formulated around Panthenol and Sodium Hyaluronate to hydrate skin and strengthen the skin barrier. This oil-control moisturizer is formulated around Pseudoalteromonas Ferment Extract and Sarcosine to balance excess oil. Water Glycerin Butylene Glycol Panthenol Pentylene Glycol Phenoxyethanol Chlorphenesin Acrylates/C10-30 Alkyl Acrylate Crosspolymer Trehalose Xylitylglucoside Sodium Hyaluronate Anhydroxylitol Disodium EDTA Sodium Hydroxide Yeast Extract Xylitol Hydrolyzed Hyaluronic Acid Carrageenan Agar Potassium Chloride Xanthan Gum Ultramarines Titanium Dioxide Water, Glycerin, Butylene Glycol, Panthenol, Pentylene Glycol, Phenoxyethanol, Chlorphenesin, Acrylates/C10-30 Alkyl Acrylate Crosspolymer, Trehalose, Xylitylglucoside, Sodium Hyaluronate, Anhydroxylitol, Disodium EDTA, Sodium Hydroxide, Yeast Extract, Xylitol, Hydrolyzed Hyaluronic Acid, Carrageenan, Agar, Potassium Chloride, Xanthan Gum, Ultramarines, Titanium Dioxide Propanediol Dimethicone Isononyl Isononanoate Hydroxyethylpiperazine Ethane Sulfonic Acid Carbomer Caprylyl Glycol Dimethiconol Tetrasodium EDTA Tocopheryl Acetate Menthoxypropanediol Pseudoalteromonas Ferment Extract Biosaccharide Gum-1 Sarcosine Salicylic Acid Water, Glycerin, Propanediol, Dimethicone, Isononyl Isononanoate, Hydroxyethylpiperazine Ethane Sulfonic Acid, Phenoxyethanol, Carbomer, Butylene Glycol, Chlorphenesin, Caprylyl Glycol, Dimethiconol, Sodium Hydroxide, Xanthan Gum, Pentylene Glycol, Tetrasodium EDTA, Tocopheryl Acetate, Menthoxypropanediol, Pseudoalteromonas Ferment Extract, Biosaccharide Gum-1, Sarcosine, Salicylic Acid These ingredients are found in both products. Ingredients higher up in an ingredient list are typically present in a larger amount. Butylene Glycol (or BG) is used within cosmetic products for a few different reasons: Overall, Butylene Glycol is a safe and well-rounded ingredient that works well with other ingredients. Though this ingredient works well with most skin types, some people with sensitive skin may experience a reaction such as allergic rashes, closed comedones, or itchiness. Chlorphenesin is a synthetic preservative. It helps protect a product against bacteria in order to extend shelf life. In most cases, Chlorphenesin is paired with other preservatives such as phenoxyethanol and caprylyl glycol. Chlorphenesin is a biocide. This means it is able to help fight the microorganisms on our skin. It is also able to fight odor-releasing bacteria. Chlorphenesin is soluble in both water and glycerin. Studies show Chlorphenesin is easily absorbed by our skin. You should speak with a skincare professional if you have concerns about using Chlorphenesin. 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. Pentylene Glycol (1,2-pentanediol) is a multitasking little diol with three main roles in a formula: Research on alkanediols (the family pentylene glycol belongs to) show they work by disrupting microbial cell membranes. This disruption helps the primary preservative system in a product work more effectively at lower doses. On the safety side, the Cosmetic Ingredient Review Expert Panel has concluded this ingredient to be safe as used in current cosmetic practices + concentrations. Typical use levels in a formula run about 1-5%. 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.