BIOTHERM Blue Retinol Night Serum Versus Kiehl's Micro-Dose Anti-Aging Retinol Serum with Ceramides and Peptide

BIOTHERM Blue Retinol Night Serum Versus Kiehl's Micro-Dose Anti-Aging Retinol Serum with Ceramides and Peptide Detailed comparison of BIOTHERM Blue Retinol Night Serum versus Kiehl's Micro-Dose Anti-Aging Retinol Serum with Ceramides and Peptide. This anti-aging serum is formulated around Niacinamide and Retinol to soften the look of wrinkles and refine skin texture. This anti-aging serum is formulated around Niacinamide and Ceramide NP to soften the look of wrinkles and refine skin texture. Water Glycerin Isononyl Isononanoate Alcohol Denat. Pentylene Glycol Dicaprylyl Ether Glycine Soja Oil Niacinamide Propylene Glycol PEG-6 Caprylic/Capric Glycerides Alaria Esculenta Extract Macrocystis Pyrifera Extract Dicaprylyl Carbonate Glyceryl Isostearate PPG-6-Decyltetradeceth-30 Sodium Hyaluronate Sodium Hydroxide Retinol Adenosine Ammonium Polyacryloyldimethyl Taurate Caprylic/Capric Triglyceride Caprylyl Glycol Vitreoscilla Ferment Trisodium Ethylenediamine Disuccinate Xanthan Gum Butylene Glycol Tocopherol Pentaerythrityl Tetra-Di-T-Butyl Hydroxyhydrocinnamate Potassium Sorbate Sodium Benzoate Phenoxyethanol Linalool Geraniol Limonene Parfum Water, Glycerin, Isononyl Isononanoate, Alcohol Denat., Pentylene Glycol, Dicaprylyl Ether, Glycine Soja Oil, Niacinamide, Propylene Glycol, PEG-6 Caprylic/Capric Glycerides, Alaria Esculenta Extract, Macrocystis Pyrifera Extract, Dicaprylyl Carbonate, Glyceryl Isostearate, PPG-6-Decyltetradeceth-30, Sodium Hyaluronate, Sodium Hydroxide, Retinol, Adenosine, Ammonium Polyacryloyldimethyl Taurate, Caprylic/Capric Triglyceride, Caprylyl Glycol, Vitreoscilla Ferment, Trisodium Ethylenediamine Disuccinate, Xanthan Gum, Butylene Glycol, Tocopherol, Pentaerythrityl Tetra-Di-T-Butyl Hydroxyhydrocinnamate, Potassium Sorbate, Sodium Benzoate, Phenoxyethanol, Linalool, Geraniol, Limonene, Parfum Cetyl Alcohol Isohexadecane Diisopropyl Sebacate 2-Oleamido-1,3-Octadecanediol 4-T-Butylcyclohexanol Acetyl Dipeptide-1 Cetyl Ester Ceramide NP Hydroxypalmitoyl Sphinganine Lauroyl Lysine Octyldodecanol Sodium Chloride Behenyl Alcohol Carbomer Cetearyl Alcohol Cetearyl Glucoside Helianthus Annuus Seed Oil Hydroxyethylcellulose Lecithin Phenethyl Alcohol Poloxamer 188 Polycaprolactone Sorbitan Laurate Steareth-100 CI 40800 Chlorphenesin 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 These ingredients are found in both products. Ingredients higher up in an ingredient list are typically present in a larger amount. 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. Ammonium Polyacryloyldimethyl Taurate is a polymer made from ammonium salts. It works as a thickener, emulsifier, and texture enhancer that gives gel-creams a silky, lightweight feel. This ingredient is versatile and low-maintenance so manufacturers love working with it. Typical usage levels in cosmetics are usually low and in the range of 0.015 - 2.3%. 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). Dicaprylyl Ether is created from caprylic acid. It is a texture-enhancer and emollient. As an emollient, Dicaprylyl Ether is non-comedogenic. It helps soften and smooth the skin by creating a barrier on top. This barrier helps trap moisture in, helping to hydrate the skin. Dicaprylyl Ether gives a non-greasy feel and better spreadability to products