Paula's Choice 1% Retinol Booster Versus SkinCeuticals Retinol 1.0

Paula's Choice 1% Retinol Booster Versus SkinCeuticals Retinol 1.0 Detailed comparison of Paula's Choice 1% Retinol Booster versus SkinCeuticals Retinol 1.0. This anti-aging treatment is formulated around Retinol and Ceramide NP to soften the look of wrinkles and refine skin texture. This anti-aging treatment is formulated around Retinol to soften the look of wrinkles and refine skin texture. Water Glycerin Carthamus Tinctorius Seed Oil Polyglyceryl-10 Caprylate/Caprate Butylene Glycol Pyrus Malus Fruit Extract Polysorbate 20 Retinol Glycyrrhiza Glabra Root Ceramide NP Palmitoyl Tripeptide-1 Avena Sativa Kernel Extract Epilobium Angustifolium Extract Arctium Lappa Seed Oil Salix Alba Extract Allantoin Dipotassium Glycyrrhizate Caprylyl Glycol Polyglyceryl-10 Laurate Dipentaerythrityl Hexacaprylate/Hexacaprate Ethylhexyl Olivate Hydrogenated Lecithin Glyceryl Ascorbate Disodium EDTA Sorbic Acid Xanthan Gum Phenoxyethanol Water, Glycerin, Carthamus Tinctorius Seed Oil, Polyglyceryl-10 Caprylate/Caprate, Butylene Glycol, Pyrus Malus Fruit Extract, Polysorbate 20, Retinol, Glycyrrhiza Glabra Root, Ceramide NP, Palmitoyl Tripeptide-1, Avena Sativa Kernel Extract, Epilobium Angustifolium Extract, Arctium Lappa Seed Oil, Salix Alba Extract, Allantoin, Dipotassium Glycyrrhizate, Caprylyl Glycol, Polyglyceryl-10 Laurate, Dipentaerythrityl Hexacaprylate/Hexacaprate, Ethylhexyl Olivate, Hydrogenated Lecithin, Glyceryl Ascorbate, Disodium EDTA, Sorbic Acid, Xanthan Gum, Phenoxyethanol Propanediol Dimethicone Cetearyl Ethylhexanoate Alcohol Denat. Allyl Methacrylates Crosspolymer Dipropylene Glycol Ammonium Polyacryloyldimethyl Taurate Acrylamide/Sodium Acryloyldimethyltaurate Copolymer Isohexadecane Isopropyl Myristate Sodium Citrate Boswellia Serrata Gum Polysorbate 80 BHT Dimethiconol Trisodium Ethylenediamine Disuccinate Bisabolol Sorbitan Oleate Citric Acid Propyl Gallate Water, Propanediol, Dimethicone, Cetearyl Ethylhexanoate, Alcohol Denat., Allyl Methacrylates Crosspolymer, Dipropylene Glycol, Ammonium Polyacryloyldimethyl Taurate, Acrylamide/Sodium Acryloyldimethyltaurate Copolymer, Retinol, Hydrogenated Lecithin, Polysorbate 20, Isohexadecane, Phenoxyethanol, Caprylyl Glycol, Isopropyl Myristate, Sodium Citrate, Boswellia Serrata Gum, Polysorbate 80, BHT, Dimethiconol, Trisodium Ethylenediamine Disuccinate, Bisabolol, Sorbitan Oleate, Citric Acid, Propyl Gallate These ingredients are found in both products. Ingredients higher up in an ingredient list are typically present in a larger amount. 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). Hydrogenated Lecithin is a more stable version of lecithin. It's made by taking lecithin (a phospholipid commonly found in soybeans and egg yolks) and hydrogenating it. This just means the unsaturated fatty acids are turned into saturated ones so they don't go bad as easily. This ingredient is an emollient, emulsifier, and penetration enhancer. As an emollient, it helps soften and hydrate skin by trapping moisture within. As an emulsifier, it prevents oil and water ingredients from separating. Hydrogenated Lecithin can form tiny spherical structures made of phospholipid bilayers called liposomes. These liposomes are able to capture compounds inside their structure and deliver them through the skin barrier. Because phospholipids are a natural component of our cell membranes, this ingredient is inherently compatible with skin. A 2021 study found lecithin-based surfactants were less harsh and more tolerable comared to Sodium Lauryl Sulfate (SLS). 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. Another perk of this ingredient is that it stays functional across a wide pH range (3-10). You'll often see it paired with boosters like Ethylhexylglycerin; one study showed that a 1:9 ratio of Ethylhexylglycerin to Phenoxyethanol damages bacterial membranes as effectively as doubling the Phenoxyethanol concentration on its own. Typical use concentrations range from 0.3-1% depending on the formula, and this ingredient is capped at 1% int the EU. Safety-wise, the fear mongering does not hold up to the evidence. The EU's Scientific Committee on Consumer Safety and FDA consider it safe as a preservative at up to 1%, including for children of all ages. Adverse systemic effects only showed up in animal studies at exposures roughly 200x higher than what people get from cosmetics. And despite its very widespread use, this ingredient is a rare sensitizer and allergic reactions are uncommon. Polysorbate 20 is a gentle, water-soluble emulsifier and mild surfactant. It stops oil and water from separating to keep your formulas blended and stable. It also acts as a mild penet