Kiehl's Micro-Dose Anti-Aging Retinol Serum with Ceramides and Peptide Versus Skintific Retinol Skin Renewal Serum

Kiehl's Micro-Dose Anti-Aging Retinol Serum with Ceramides and Peptide Versus Skintific Retinol Skin Renewal Serum Detailed comparison of Kiehl's Micro-Dose Anti-Aging Retinol Serum with Ceramides and Peptide versus Skintific Retinol Skin Renewal Serum. This anti-aging serum is formulated around Niacinamide and Ceramide NP to soften the look of wrinkles and refine skin texture. This smoothing serum is formulated around Niacinamide and Retinol to refine skin texture and soften the look of wrinkles. 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 Dimethicone Lactococcus Ferment Lysate Cyclopentasiloxane Panthenol Diethoxyethyl Succinate Tranexamic Acid Dipropylene Glycol PEG-20 Methyl Glucose Sesquistearate Boron Nitride Dimethicone/Vinyl Dimethicone Crosspolymer Ammonium Acryloyldimethyltaurate/Vp Copolymer 1,2-Hexanediol Ectoin Hydroxyacetophenone Polyacrylate-13 Polysorbate 20 Polyisobutene Ergothioneine Ascorbyl Tetraisopalmitate Sodium Lauroyl Lactylate Tocopheryl Acetate Ceramide AP Palmitoyl Tripeptide-5 Sorbitan Isostearate Hydroxypinacolone Retinoate 10-Hydroxydecanoic Acid Ceramide EOP Silica 1,10-Decanediol Gardenia Florida Flower Extract Hydrolyzed Vegetable Protein Disodium EDTA Diisopropyl Adipate Glucose Magnolia Officinalis Bark Extract Sebacic Acid Punica Granatum Pericarp Extract Garcinia Mangostana Peel Extract Phytosphingosine Aroma Cholesterol Xanthan Gum BHA Sodium Benzoate Ethylhexylglycerin Tamarindus Indica Seed Gum BHT Water, Butylene Glycol, Glycerin, Dimethicone, Niacinamide, Lactococcus Ferment Lysate, Cyclopentasiloxane, Panthenol, Pentylene Glycol, Diethoxyethyl Succinate, Tranexamic Acid, Dipropylene Glycol, PEG-20 Methyl Glucose Sesquistearate, Boron Nitride, Dimethicone/Vinyl Dimethicone Crosspolymer, Ammonium Acryloyldimethyltaurate/Vp Copolymer, 4-T-Butylcyclohexanol, 1,2-Hexanediol, Ectoin, Hydroxyacetophenone, Polyacrylate-13, Retinol, Polysorbate 20, Polyisobutene, Adenosin 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. 4-T-Butylcyclohexanol has skin soothing and perfuming/masking properties. A study from 2016 found it to have skin-soothing properties both in-vivo and in-vitro. It works by intercepting the signals of irritation and can soothe the skin in a few minutes. According to a manufacturer, this ingredient has a scent similar to musk or patchouli. Besides having a skin soothing effect, it can also help cover other unpleasant scents as a masking ingredient. Adenosine is a purine nucleoside that your body already makes in every cell. In skincare, it acts mainly as a skin conditioning and anti-aging agent. The way it works is fairly well mapped out: Your skin has cells called fibroblasts that build collagen (the stuff that keeps skin firm and smooth). Adenosine basically flips a switch on these cells that tells them to get to work making more collagen and other proteins. These cells slow down on their own as skin ages, so Adenosine helps give them a little nudge to keep going. The clinical backing is pretty solid too. A blind, randomized, placebo-controlled trial of 126 women aged 45-65 tested a 0.1% cream twice daily and found real improvements in crow's feet and frown lines using a precise 3D skin-mapping technique; these changes showed up by week 3 and held at 2 months. A later study using Adenosine-loaded dissolving microneedle patches reported gains in wrinkle depth, dermal density, elasticity, and hydration. On concentrations, South Korea's Ministry of Food and Drug Safety has set 0.04% as the approved functional anti-wrinkle level. You'll typically see this ingredient used somewhere in the 0.04-0.1% range since it works at low doses. This ingredient has been found safe for cosmetics with the data showing no irritation or sensitization. Overall, this is a great ingredient for any anti-aging routine and has no photosensitizing effect, so it suits both AM and PM use. 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. Carbomer is a synthetic thickening and gelling agent. It's basically the ingredient that gives a lot of serums, gels, creams, and sunscreens their smooth, non-sticky texture. Although legally permitted at very high levels, carbomers are normally used at concentrations below 1%. It also needs to be neutralized to actually thicken, and because it is a large molecule, it doesn't really penetrate the skin barrier. Allergy-wise, the risk is very low. Clinical studies show carbomers have low potential for skin irritation/sensitization even at concentrations up to 100%. A 2024 UK study patch-tested 1,302 patients an