COSRX The Vitamin C 23 Serum Versus Beauty of Joseon Glow Deep Serum: Rice + Arbutin

COSRX The Vitamin C 23 Serum Versus Beauty of Joseon Glow Deep Serum: Rice + Arbutin Detailed comparison of COSRX The Vitamin C 23 Serum versus Beauty of Joseon Glow Deep Serum: Rice + Arbutin. 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 Alpha-Arbutin and Niacinamide to fade the look of dark spots and brighten dull-looking skin. 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 Oryza Sativa Bran Water 68.6% Glycerin 1,2-Hexanediol Dipropylene Glycol Alpha-Arbutin 2% Methyl Gluceth-20 Polyglycerin-3 Trehalose Glyceryl Glucoside Hydrolyzed Jojoba Esters Hydroxyethyl Acrylate/Sodium Acryloyldimethyl Taurate Copolymer Ethylhexylglycerin Hydroxyethylcellulose Xanthan Gum Acrylates/C10-30 Alkyl Acrylate Crosspolymer Coptis Japonica Root Extract Sorbitan Isostearate Glucose Coix Lacryma-Jobi Ma-Yuen Seed Extract Glycine Soja Seed Extract Hordeum Distichon Extract Oryza Sativa Extract Sesamum Indicum Seed Extract Triticum Vulgare Seed Extract Vigna Radiata Seed Extract Zea Mays Kernel Extract Oryza Sativa Bran Water 68.6%, Water, Glycerin, Butylene Glycol, 1,2-Hexanediol, Dipropylene Glycol, Alpha-Arbutin 2%, Niacinamide, Methyl Gluceth-20, Panthenol, Polyglycerin-3, Trehalose, Glyceryl Glucoside, Hydrolyzed Jojoba Esters, Hydroxyethyl Acrylate/Sodium Acryloyldimethyl Taurate Copolymer, Ethylhexylglycerin, Hydroxyethylcellulose, Xanthan Gum, Acrylates/C10-30 Alkyl Acrylate Crosspolymer, Arginine, Disodium EDTA, Coptis Japonica Root Extract, Sorbitan Isostearate, Glucose, Coix Lacryma-Jobi Ma-Yuen Seed Extract, Glycine Soja Seed Extract, Hordeum Distichon Extract, Oryza Sativa Extract, Sesamum Indicum Seed Extract, Triticum Vulgare Seed Extract, Vigna Radiata Seed Extract, Zea Mays Kernel Extract These ingredients are found in both products. Ingredients higher up in an ingredient list are typically present in a larger amount. 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 corneum) that keeps everything hydrated and happy. Here's an interesting thing about Arginine: your skin converts it into urea through the Krebs-Henseleit urea cycle. Urea is one of the most effective humectants your skin naturally produces. A clinical study showed applying 2.5% arginine hydrochloride to atopic dermatitis skin showed significant urea levels in the stratum corneum and improved moisture in just four weeks. Arginine is also a precursor to nitric oxide; nitric oxide improves microcirculation and supports wound healing and collagen synthesis. One study found that an amino acid complex containing Arginine reduced skin irritation, improved hydration, and accelerated skin repair in clinical / in-vivo studies. Arginine itself is an amino acid and not a fatty acid, oil, or ester. On its own, it's not a direct food source for Malassezia, or the yeast that causes fungal acne. 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. Disodium EDTA is a chelating agent. It grabs onto and deactivates metal ions that sneak into your products from water, packaging, or air. This ingredient mainly works behind the scenes and helps with: On top of that, this ingredient can counteract the effects of hard water by binding to the minerals in it. One thing worth knowing is that Disodium EDTA has been shown to be a mild penetration enhancer. It can help other ingredients absorb into skin more effectively which can be a double-edged sword (great for actives, but can also make the active too strong if you have sensitive skin). Clinical patch testing showed no significant skin irritation at typical use concentrations and minimal dermal absorption. You'll most likely see this ingredient near the end of an ingredient list. It's typically found in concentrations less than 1%. Niacinamide is a multitasking form of vitamin B3 that strengthens the skin barrier, reduces pores and dark spots, regulates oil, and improves signs of aging. And the best part? It's gentle and well-tolerated by most skin types, including sensitive and reactive skin. You might have heard of "niacin flush", or the reddening of skin that causes itchiness. Niacinamide has not been found to cause this. In very rare cases, some individuals may not be able to tolerate niacinamide at all or