Hydropeptide Firma-Bright 20% Vitamin C Booster Versus Kiehl's Powerful-Strength Vitamin C Serum

Hydropeptide Firma-Bright 20% Vitamin C Booster Versus Kiehl's Powerful-Strength Vitamin C Serum Detailed comparison of Hydropeptide Firma-Bright 20% Vitamin C Booster versus Kiehl's Powerful-Strength Vitamin C Serum. This brightening serum is formulated around Sodium Ascorbyl Phosphate and Niacinamide to brighten dull-looking skin and soften the look of wrinkles. This anti-aging serum is formulated around Ascorbic Acid and Ascorbyl Glucoside to soften the look of wrinkles and brighten dull-looking skin. Water Sodium Ascorbyl Phosphate Pentylene Glycol Glycerin Niacinamide Propanediol Carrageenan Erythritol Sodium PCA Xanthan Gum 1,2-Hexanediol Hydroxyacetophenone Acetyl Hexapeptide-8 Caprylyl Glycol Disodium Phosphate Sodium Phosphate Sodium Hyaluronate Anogeissus Leiocarpus Bark Extract Sodium Phytate Hydrangea Arborescens Root Extract Morus Alba Root Extract Polysorbate 20 Resveratrol Scutellaria Lateriflora Extract Pentapeptide-21 Avena Sativa Kernel Extract Water, Sodium Ascorbyl Phosphate, Pentylene Glycol, Glycerin, Niacinamide, Propanediol, Carrageenan, Erythritol, Sodium PCA, Xanthan Gum, 1,2-Hexanediol, Hydroxyacetophenone, Acetyl Hexapeptide-8, Caprylyl Glycol, Disodium Phosphate, Sodium Phosphate, Sodium Hyaluronate, Anogeissus Leiocarpus Bark Extract, Sodium Phytate, Hydrangea Arborescens Root Extract, Morus Alba Root Extract, Polysorbate 20, Resveratrol, Scutellaria Lateriflora Extract, Pentapeptide-21, Avena Sativa Kernel Extract Propylene Glycol Dimethicone Ascorbic Acid Ethylhexyl Palmitate Cetyl PEG/PPG-10/1 Dimethicone Dimethicone Crosspolymer Ascorbyl Glucoside Cyclohexasiloxane Hydroxyethylpiperazine Ethane Sulfonic Acid Lauroyl Lysine Acrylonitrile/Methyl Methacrylate/Vinylidene Chloride Copolymer Polysilicone-11 Adenosine Hydrolyzed Hyaluronic Acid Limonene Isobutane Citrus Aurantium Dulcis Peel Oil Citrus Limon Peel Oil Citral Pentaerythrityl Tetra-Di-T-Butyl Hydroxyhydrocinnamate Propylene Glycol, Dimethicone, Glycerin, Ascorbic Acid, Ethylhexyl Palmitate, Cetyl PEG/PPG-10/1 Dimethicone, Dimethicone Crosspolymer, Ascorbyl Glucoside, Cyclohexasiloxane, Hydroxyethylpiperazine Ethane Sulfonic Acid, Lauroyl Lysine, Acrylonitrile/Methyl Methacrylate/Vinylidene Chloride Copolymer, Polysilicone-11, Adenosine, Hydrolyzed Hyaluronic Acid, Limonene, Isobutane, Citrus Aurantium Dulcis Peel Oil, Citrus Limon Peel Oil, Citral, Pentaerythrityl Tetra-Di-T-Butyl Hydroxyhydrocinnamate Be the first to review 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.