Regimen Lab Vitamin X Versus Allies of Skin 20% Vitamin C Brighten + Firm Serum

Regimen Lab Vitamin X Versus Allies of Skin 20% Vitamin C Brighten + Firm Serum Detailed comparison of Regimen Lab Vitamin X versus Allies of Skin 20% Vitamin C Brighten + Firm Serum. This brightening serum is formulated around Ascorbic Acid and Tocopherol to brighten dull-looking skin and soften the look of wrinkles. This brightening serum is formulated around 3-O-Ethyl Ascorbic Acid and Glutathione to brighten dull-looking skin. Water Propanediol Ascorbic Acid Propylene Glycol Dimethyl Isosorbide Pentylene Glycol Acetyl Zingerone Glycerin Tocopherol Epigallocatechin Gallate Ferulic Acid Resveratrol Genistein Quercetin Silybin Hesperidin Methyl Chalcone Dimethylmethoxy Chromanol Xanthan Gum Lecithin Sclerotium Gum Pullulan Disodium EDTA Phenoxyethanol Ethylhexylglycerin Caprylyl Glycol Citric Acid Water, Propanediol, Ascorbic Acid, Propylene Glycol, Dimethyl Isosorbide, Pentylene Glycol, Acetyl Zingerone, Glycerin, Tocopherol, Epigallocatechin Gallate, Ferulic Acid, Resveratrol, Genistein, Quercetin, Silybin, Hesperidin Methyl Chalcone, Dimethylmethoxy Chromanol, Xanthan Gum, Lecithin, Sclerotium Gum, Pullulan, Disodium EDTA, Phenoxyethanol, Ethylhexylglycerin, Caprylyl Glycol, Citric Acid 3-O-Ethyl Ascorbic Acid Benzimidazole Diamond Amidoethyl Urea Carbamoyl Propyl Polymethylsilsesquioxane Helianthus Annuus Seed Wax Polyglyceryl-10 Tristearate Ethoxydiglycol Dicaprylyl Ether Citrus Aurantium Dulcis Callus Culture Extract Glutathione Acetyl Cysteine Ergothioneine Gluconolactone Leuconostoc/Radish Root Ferment Filtrate Silica Sodium Benzoate Calcium Gluconate Propanediol, Glycerin, 3-O-Ethyl Ascorbic Acid, Benzimidazole Diamond Amidoethyl Urea Carbamoyl Propyl Polymethylsilsesquioxane, Dimethyl Isosorbide, Helianthus Annuus Seed Wax, Polyglyceryl-10 Tristearate, Ethoxydiglycol, Dicaprylyl Ether, Water, Caprylyl Glycol, Citrus Aurantium Dulcis Callus Culture Extract, Glutathione, Acetyl Cysteine, Dimethylmethoxy Chromanol, Ergothioneine, Tocopherol, Gluconolactone, Leuconostoc/Radish Root Ferment Filtrate, Xanthan Gum, Silica, Sodium Benzoate, Calcium Gluconate, Phenoxyethanol 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). Dimethyl Isosorbide (often shortened to DMI) is a sugar-derived solvent made from sorbitol. It's used to dissolve tricky ingredients and help them mix smoothly into a formula. Many actives sit as gritty crystals when undissolved, so DMI swoops in to full dissolve them. This helps improve texture, stability, and how evenly an active is distributed. It does have a penetration-enhancing reputation that is a bit more nuanced than marketing suggests; a cell study on human skin found that 10% DMI didn't significantly boost the permeation of Hydroquinone, Salicylic Acid, or Octadecenedioic Acid compared to controls (though it did improve their solubility in the formula itself). Typical usage concentrations usually range from 1-10% depending on the formula's needs; this ingredient is also well tolerated at these levels. Dimethylmethoxy Chromanol is an antioxidant. 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. 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 bac