COSRX The Vitamin C 23 Serum Versus Beauty of Joseon Light On Serum : Centella + Vita C

COSRX The Vitamin C 23 Serum Versus Beauty of Joseon Light On Serum : Centella + Vita C Detailed comparison of COSRX The Vitamin C 23 Serum versus Beauty of Joseon Light On Serum : Centella + Vita C. This brightening serum is formulated around Ascorbic Acid and 3-O-Ethyl Ascorbic Acid to brighten dull-looking skin and fade the look of dark spots. This brightening serum is formulated around Centella Asiatica Extract and 3-O-Ethyl Ascorbic Acid to brighten dull-looking skin and calm redness. Water Ascorbic Acid 23% Propanediol Dimethicone Tromethamine Panthenol 3-O-Ethyl Ascorbic Acid Squalane Caffeine Sodium Chloride Sodium Hyaluronate Sodium Sulfite Disodium EDTA Glutathione Adenosine Acetyl Glucosamine Gardenia Florida Fruit Extract Allantoin Dextrin Tocotrienols Tocopherol Elaeis Guineensis Oil Butylene Glycol Arginine Niacinamide Pentylene Glycol Alcohol Denat. Helianthus Annuus Seed Oil Glycyrrhiza Glabra Root Extract Methyl Trimethicone Carthamus Tinctorius Seed Oil Camellia Japonica Seed Oil Daucus Carota Sativa Root Extract Beta-Carotene Water, Ascorbic Acid 23%, Propanediol, Dimethicone, Tromethamine, Panthenol, 3-O-Ethyl Ascorbic Acid, Squalane, Caffeine, Sodium Chloride, Sodium Hyaluronate, Sodium Sulfite, Disodium EDTA, Glutathione, Adenosine, Acetyl Glucosamine, Gardenia Florida Fruit Extract, Allantoin, Dextrin, Tocotrienols, Tocopherol, Elaeis Guineensis Oil, Butylene Glycol, Arginine, Niacinamide, Pentylene Glycol, Alcohol Denat., Helianthus Annuus Seed Oil, Glycyrrhiza Glabra Root Extract, Methyl Trimethicone, Carthamus Tinctorius Seed Oil, Camellia Japonica Seed Oil, Daucus Carota Sativa Root Extract, Beta-Carotene Centella Asiatica Extract Glycerin Betaine Dicaprylyl Carbonate Cetyl Ethylhexanoate Laminaria Japonica Extract Eclipta Prostrata Leaf Extract Phellodendron Amurense Bark Extract Citrus Unshiu Peel Extract Brassica Oleracea Acephala Leaf Extract Hydrolyzed Gardenia Florida Extract Hydrogenated Lecithin Cetearyl Alcohol Dimethicone/Vinyl Dimethicone Crosspolymer Silica Bisabolol Potassium Cetyl Phosphate Hydrolyzed Jojoba Esters Cetearyl Olivate Sorbitan Olivate Hydroxyethyl Acrylate/Sodium Acryloyldimethyl Taurate Copolymer Ammonium Acryloyldimethyltaurate/Beheneth-25 Methacrylate Crosspolymer Xanthan Gum Polyglyceryl-10 Myristate Fructooligosaccharides Beta-Glucan Sorbitan Isostearate Hydrolyzed Hyaluronic Acid Maltodextrin Carbomer Ascorbic Acid Polypeptide 1,2-Hexanediol Hydroxyacetophenone Ethylhexylglycerin Centella Asiatica Extract, 3-O-Ethyl Ascorbic Acid, Glycerin, Propanediol, Betaine, Dicaprylyl Carbonate, Methyl Trimethicone, Cetyl Ethylhexanoate, Panthenol, Laminaria Japonica Extract, Eclipta Prostrata Leaf Extract, Phellodendron Amurense Bark Extract, Citrus Unshiu Peel Extract, Brassica Oleracea Acephala Leaf Extract, Hydrolyzed Gardenia Florida Extract, Hydrogenated Lecithin, Cetearyl Alcohol, Water, Dimethicone/Vinyl Dimethicone Crosspolymer, Silica, Bisabolol, Potassium Cetyl Phosphate, Hydrolyzed Jojoba Esters, Cetearyl Olivate, Sorbitan Olivate, Hydroxyethyl Acrylate/Sodium Acryloyldimethyl Taurate Copolymer, Ammonium Acryloyldimethyltaurate/Beheneth-25 Methacrylate Crosspolymer, Xanthan Gum, Polyglyceryl-10 Myristate, Adenosine, Fructooligosaccharides, Beta-Glucan, Butylene Glycol, Sorbitan Isostearate, Hydrolyzed Hyaluronic Acid, Maltodextrin, Arginine, Carbomer, Ascorbic Acid Polypeptide, 1,2-Hexanediol, Hydroxyacetophenone, Ethylhexylglycerin These ingredients are found in both products. Ingredients higher up in an ingredient list are typically present in a larger amount. 3-O-Ethyl Ascorbic Acid is one of the most popular "stable" vitamin C derivatives in skincare. Plain ascorbic acid is fantastic but notoriously fragile; it browns, oxidizes, and loses potency fast. So attaching an ethyl group to the third carbon of the molecule gives it some cool perks: In a formula, it does the 3 classic vitamin C jobs: it acts as an antioxidant, helps brighten skin tone by inhibiting tyrosinase, and supports collagen. The evidence is reasonably solid for a cosmetic ingredient; Liao and colleagues (2018) showed it's significantly more stable than ascorbic acid while still being effective. A 2021 study by Zerbinati and colleagues tested a serum with 30% 3-O-ethyl-l-ascorbic acid and 1% lactic acid significantly increased collagen production, reduced UVB-induced DNA damage, and decreased melanin on a reconstructed pigmented skin model. Typical real world usage sits around 0.5-5% (and 1-2% is common for daily serums). Amounts up to 30% have been shown to be non-irritating on human skin samples, but two isolated cases reported allergic contact dermatitis so a patch test is sensible if you have reactive skin. 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. Arginine is a semi-essential amino acid. This just means our bodies can product a bit on its own, but sometimes needs a little boost from food sources. It is a part of your skin's natural moisturizing factor (NMF), or the water-loving molecules in your outermost layer of skin (stratum co