COSRX The Vitamin C 23 Serum Versus Beauty of Joseon Glow Serum: Propolis + Niacinamide

COSRX The Vitamin C 23 Serum Versus Beauty of Joseon Glow Serum: Propolis + Niacinamide Detailed comparison of COSRX The Vitamin C 23 Serum versus Beauty of Joseon Glow Serum: Propolis + Niacinamide. 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 acne serum is formulated around Propolis Extract and Niacinamide to clear breakouts 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 Propolis Extract Dipropylene Glycol Glycerin 1,2-Hexanediol Melia Azadirachta Flower Extract Melia Azadirachta Leaf Extract Curcuma Longa Root Extract Ocimum Sanctum Leaf Extract Theobroma Cacao Seed Extract Melaleuca Alternifolia Leaf Extract Centella Asiatica Extract Corallina Officinalis Extract Lotus Corniculatus Seed Extract Calophyllum Inophyllum Seed Oil Betaine Salicylate Sodium Polyacryloyldimethyl Taurate Polyglyceryl-10 Laurate Caprylyl Glycol Ethylhexylglycerin Octanediol Xanthan Gum Carbomer Propolis Extract, Dipropylene Glycol, Glycerin, Butylene Glycol, Water, Niacinamide, 1,2-Hexanediol, Melia Azadirachta Flower Extract, Melia Azadirachta Leaf Extract, Sodium Hyaluronate, Curcuma Longa Root Extract, Ocimum Sanctum Leaf Extract, Theobroma Cacao Seed Extract, Melaleuca Alternifolia Leaf Extract, Centella Asiatica Extract, Corallina Officinalis Extract, Lotus Corniculatus Seed Extract, Calophyllum Inophyllum Seed Oil, Betaine Salicylate, Sodium Polyacryloyldimethyl Taurate, Tromethamine, Polyglyceryl-10 Laurate, Caprylyl Glycol, Ethylhexylglycerin, Dextrin, Pentylene Glycol, Octanediol, Tocopherol, Xanthan Gum, Carbomer These ingredients are found in both products. Ingredients higher up in an ingredient list are typically present in a larger amount. 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. Dextrin is a starch-derived polysaccharide. It's made by partially breaking down corn, potato, or other plant starches. Think of it as "half-processed" starch; it's less complex than the original but not fully broken down into sugar like maltodextrin. In cosmetics, it mainly functions as a bulking agent, viscosity controller, binder, and absorbent. It helps thicken products, stabilize powders, and get certain textures a less "wet" feel. This ingredient has a pretty solid safety profile; it's recognized as a safe food additive and its large molecular size means it doesn't meaningfully penetrate skin. Human repeat insult patch tests using a rinse-off facial product containing 42.69% dextrin found no skin irritation or sensitization in 54 subjects. Typical real-world usage is much lower: usually under 1% as a texture modifier and up to 40% in masks (rinse off products use less). 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 experience an allergic reaction to it. If you are experiencing flaking, irritation, and dryness with this ingredient, be sure to double check all your products as this ingredient can be found in all categories of skincare. When incorporating niacinamide into your routine, look out for concentration amounts. Typically, 5% niacinamide provides benefits such as fading dark spots. However, if you have sensitive skin, it is better to begin with a smaller concentration. When you apply niacinamide to your skin, your body converts it into nicotinamide adenine dinucleotide (NAD). NAD is an essential coenzyme that is already found in your cells as "fuel" and powers countless biological processes. In your skin, NAD helps repair cell damage, produce new healthy cells, support collagen production, strengthen the skin barrier, and fight environmental stressors (like UV and pollution). Our natural NAD levels start to decline with age, leading to slower skin repair, visible aging, and a weaker skin barrier. By providing your skin niacinamide, you're recharging your skin's NAD levels. This leads to stronger, healthier, and younger