Peptide Skincare & BeautySkin science and ingredient guides

Ingredient or product comparison

Kiehl's Micro-Dose Anti-Aging Retinol Serum with Ceramides and Peptide Versus Clinique Smart Custom-Repair Serum

Kiehl's Micro-Dose Anti-Aging Retinol Serum with Ceramides and Peptide Versus Clinique Smart Custom-Repair Serum Detailed comparison of Kiehl's Micro-Dose Anti-Aging Retinol Serum with Ceramides and Peptide versus Clinique Smart Custom-Repair Serum. This anti-

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Kiehl's Micro-Dose Anti-Aging Retinol Serum with Ceramides and Peptide Versus Clinique Smart Custom-Repair Serum Detailed comparison of Kiehl's Micro-Dose Anti-Aging Retinol Serum with Ceramides and Peptide versus Clinique Smart Custom-Repair Serum. This anti-aging serum is formulated around Niacinamide and Ceramide NP to soften the look of wrinkles and refine skin texture. This anti-aging serum is formulated around Ascorbyl Glucoside and Acetyl Hexapeptide-8 to soften the look of wrinkles and brighten dull-looking skin. Water Glycerin Butylene Glycol Pentylene Glycol Niacinamide Cetyl Alcohol Isohexadecane Isononyl Isononanoate Diisopropyl Sebacate 2-Oleamido-1,3-Octadecanediol 4-T-Butylcyclohexanol Acetyl Dipeptide-1 Cetyl Ester Adenosine Ceramide NP Hydroxypalmitoyl Sphinganine Lauroyl Lysine Octyldodecanol Pentaerythrityl Tetra-Di-T-Butyl Hydroxyhydrocinnamate Sodium Chloride Sodium Hyaluronate Sodium Hydroxide Trisodium Ethylenediamine Disuccinate Retinol Tocopherol Dicaprylyl Ether Ammonium Polyacryloyldimethyl Taurate Behenyl Alcohol Caprylyl Glycol Carbomer Cetearyl Alcohol Cetearyl Glucoside Glycine Soja Oil Helianthus Annuus Seed Oil Hydroxyethylcellulose Lecithin Phenethyl Alcohol Poloxamer 188 Polycaprolactone Sorbitan Laurate Steareth-100 CI 40800 Chlorphenesin Phenoxyethanol Water, Glycerin, Butylene Glycol, Pentylene Glycol, Niacinamide, Cetyl Alcohol, Isohexadecane, Isononyl Isononanoate, Diisopropyl Sebacate, 2-Oleamido-1,3-Octadecanediol, 4-T-Butylcyclohexanol, Acetyl Dipeptide-1 Cetyl Ester, Adenosine, Ceramide NP, Hydroxypalmitoyl Sphinganine, Lauroyl Lysine, Octyldodecanol, Pentaerythrityl Tetra-Di-T-Butyl Hydroxyhydrocinnamate, Sodium Chloride, Sodium Hyaluronate, Sodium Hydroxide, Trisodium Ethylenediamine Disuccinate, Retinol, Tocopherol, Dicaprylyl Ether, Ammonium Polyacryloyldimethyl Taurate, Behenyl Alcohol, Caprylyl Glycol, Carbomer, Cetearyl Alcohol, Cetearyl Glucoside, Glycine Soja Oil, Helianthus Annuus Seed Oil, Hydroxyethylcellulose, Lecithin, Phenethyl Alcohol, Poloxamer 188, Polycaprolactone, Sorbitan Laurate, Steareth-100, CI 40800, Chlorphenesin, Phenoxyethanol Isododecane Dimethicone Cyclopentasiloxane Polysilicone-11 Ascorbyl Glucoside PEG-10 Dimethicone PEG-6 Citrus Grandis Peel Extract Morus Nigra Root Extract Hordeum Vulgare Extract Scutellaria Baicalensis Root Extract Cucumis Sativus Fruit Extract Hydrolyzed Rice Bran Extract Gentiana Lutea Root Extract Algae Extract Plankton Extract Vitis Vinifera Fruit Extract Sigesbeckia Orientalis Extract Triticum Vulgare Germ Extract Oryza Sativa Bran Extract Faex Extract Acetyl Hexapeptide-8 Palmitoyl Oligopeptide Ergothioneine Whey Protein Polysorbate 20 Micrococcus Lysate Cholesterol Di-C12-18 Alkyl Dimonium Chloride Salicylic Acid Propylene Glycol Dicaprate Helianthus Annuus Seedcake Caffeine Glycine Soja Protein Tocopheryl Acetate Acetyl Glucosamine Glyceryl Polymethacrylate Dimethoxytolyl Propylresorcinol Synthetic Fluorphlogopite Glycyrrhetinic Acid Tromethamine Polysorbate 80 Sodium Rna Squalane Aminopropyl Ascorbyl Phosphate Ammonium Acryloyldimethyltaurate/Vp Copolymer PEG-8 Hexylene Glycol Acrylamide/Sodium Acryloyldimethyltaurate Copolymer Tin Oxide Disodium EDTA CI 19140 CI 14700 CI 77891 Palmitoyl Hexapeptide-12 Calcium Chloride Sea Whip Extract Water, Isododecane, Dimethicone, Cyclopentasiloxane, Polysilicone-11, Butylene Glycol, Ascorbyl Glucoside, PEG-10 Dimethicone, PEG-6, Citrus Grandis Peel Extract, Morus Nigra Root Extract, Hordeum Vulgare Extract, Scutellaria B 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. 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. Caprylyl Glycol is a humectant, skin conditioner, emollient, and preservative booster derived from either caprylic acid or synthetically created. Typical use levels vary from 0.3-1% as a preservative booster and go up to 2% to condition skin. Because it is not a free-fatty acid, this ingredient is fungal acne safe (there's nothing for Malassezia to feed on). 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. Isohexadecane is added to enhance texture, emulsify, and to help cleanse. It is an isoparrafin. It is a component of petrolatum. Due to its large size, Isohexadecane is not absorbed by the skin. Instead, it sits on top and acts as an emollient. Emollients help keep your skin soft and smooth by trapping moisture within. Isohexadecane is often used in products designed to help oily skin. It is lightweight and non-greasy while helping to moisturize. When mixed with silicones, it gives a product a silky feel. Lecithin is a term for a group of substances found in the cell membranes of plants, animals, and humans. They are made up of phospholipids. Thanks to its amphiphilic structure (water-loving head and oil-loving tail), it is a true multitasker: It plays well with most ingredients and is typically used at 0.1-1%. However, concentrations up to 50% have been reported in moisturizers. 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