Peptide Skincare & BeautySkin science and ingredient guides

Ingredient or product comparison

MediCube Deep Vita C Capsule Cream Versus Olay Vitamin C + Peptide 24

MediCube Deep Vita C Capsule Cream Versus Olay Vitamin C + Peptide 24 Detailed comparison of MediCube Deep Vita C Capsule Cream versus Olay Vitamin C + Peptide 24. This brightening moisturizer is formulated around Niacinamide and Ascorbic Acid to brighten dull

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MediCube Deep Vita C Capsule Cream Versus Olay Vitamin C + Peptide 24 Detailed comparison of MediCube Deep Vita C Capsule Cream versus Olay Vitamin C + Peptide 24. This brightening moisturizer is formulated around Niacinamide and Ascorbic Acid to brighten dull-looking skin and fade the look of dark spots. This brightening moisturizer is formulated around Niacinamide and 3-O-Ethyl Ascorbic Acid to brighten dull-looking skin and soften the look of wrinkles. Hippophae Rhamnoides Water Glycerin Water Niacinamide Methylpropanediol Propanediol 1,2-Hexanediol Butylene Glycol Dipropylene Glycol Caprylic/Capric Triglyceride Glycereth-26 Ethylhexyl Palmitate Cetearyl Alcohol Arginine Carbomer Ammonium Acryloyldimethyltaurate/Vp Copolymer Cetearyl Olivate Helianthus Annuus Seed Oil Sorbitan Olivate Simethicone Polyglyceryl-10 Laurate Ethylhexylglycerin Adenosine Parfum Polyacrylate-13 Glycine Soja Oil Disodium EDTA Polyisobutene Hydrolyzed Sclerotium Gum Glyceryl Stearate Gluconolactone Polysorbate 20 Sorbitan Isostearate Hydrogenated Lecithin Bixa Orellana Seed Oil Polyglyceryl-10 Stearate Alpha-Arbutin Panthenol Sodium Ascorbyl Phosphate Pentylene Glycol Ferulic Acid Tocopherol Ascorbyl Glucoside 3-O-Ethyl Ascorbic Acid Bisabolol Ascorbic Acid Hydroxyphenyl Propamidobenzoic Acid Pyridoxine Ubiquinone Biotin Folic Acid Sodium Hyaluronate Ascorbyl Propyl Hyaluronate Ascorbyl Palmitate Cyanocobalamin Thiamine Hcl Riboflavin Linoleic Acid Beta-Carotene Rutin Hydroxycinnamic Acid Hippophae Rhamnoides Water, Glycerin, Water, Niacinamide, Methylpropanediol, Propanediol, 1,2-Hexanediol, Butylene Glycol, Dipropylene Glycol, Caprylic/Capric Triglyceride, Glycereth-26, Ethylhexyl Palmitate, Cetearyl Alcohol, Arginine, Carbomer, Ammonium Acryloyldimethyltaurate/Vp Copolymer, Cetearyl Olivate, Helianthus Annuus Seed Oil, Sorbitan Olivate, Simethicone, Polyglyceryl-10 Laurate, Ethylhexylglycerin, Adenosine, Parfum, Polyacrylate-13, Glycine Soja Oil, Disodium EDTA, Polyisobutene, Hydrolyzed Sclerotium Gum, Glyceryl Stearate, Gluconolactone, Polysorbate 20, Sorbitan Isostearate, Hydrogenated Lecithin, Bixa Orellana Seed Oil, Polyglyceryl-10 Stearate, Alpha-Arbutin, Panthenol, Sodium Ascorbyl Phosphate, Pentylene Glycol, Ferulic Acid, Tocopherol, Ascorbyl Glucoside, 3-O-Ethyl Ascorbic Acid, Bisabolol, Ascorbic Acid, Hydroxyphenyl Propamidobenzoic Acid, Pyridoxine, Ubiquinone, Biotin, Folic Acid, Sodium Hyaluronate, Ascorbyl Propyl Hyaluronate, Ascorbyl Palmitate, Cyanocobalamin, Thiamine Hcl, Riboflavin, Linoleic Acid, Beta-Carotene, Rutin, Hydroxycinnamic Acid Isohexadecane Dimethicone Lactic Acid Isopropyl Isostearate Sodium Polyacryloyldimethyl Taurate Stearyl Alcohol Palmitoyl Pentapeptide-4 Sodium Lactate Trehalose Cetearyl Glucoside Behenyl Alcohol Cetyl Alcohol Stearic Acid Palmitic Acid Dimethiconol PEG-100 Stearate Sodium Benzoate Avena Sativa Peptide Water, Glycerin, Isohexadecane, Niacinamide, Dimethicone, Lactic Acid, Isopropyl Isostearate, Sodium Polyacryloyldimethyl Taurate, Stearyl Alcohol, 3-O-Ethyl Ascorbic Acid, Palmitoyl Pentapeptide-4, Panthenol, Sodium Lactate, Trehalose, Cetearyl Glucoside, Cetearyl Alcohol, Behenyl Alcohol, Cetyl Alcohol, Stearic Acid, Palmitic Acid, Dimethiconol, PEG-100 Stearate, Sodium Benzoate, Parfum, Ascorbic Acid, Avena Sativa Peptide 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. Ascorbic Acid is is pure Vitamin C and is the biologically active form used directly by skin. Not only is vitamin C great for your overall health and immune system, but it also has plenty of benefits for your skin. It is best supported by academic literature for: Topical vitamin C has been shown to help neutralize oxidative stress from UV and pollution, helping to improve photoaging and hyperpigmentation when used consistently. One clinical study found that using 5% topical vitamin C for six months improved signs of photodamaged skin, both on the surface and in the deeper structural layers of the skin. While vitamin C doesn’t replace sunscreen, studies show it can boost photoprotection when combined with Vitamin E and ferulic acid. These two ingredients help improve stability and protective effects. The big downside of this ingredient is formulation difficulty. Vitamin C is prone to oxidation and doesn't penetrate the skin unless formulated correctly. Research found that vitamin C absorbs into the skin best at a low pH (< 3.5) with about 20% being the upper limit for effective absorption. Skin levels can saturate after repeated application; this means your skin won’t keep absorbing more once it’s full of vitamin C. This is why more isn’t always better with vitamin C and why very high concentrations don’t necessarily give extra benefits. Ascorbic acid generally works well with many skincare ingredients but can be irritating when combined with other active ingredients. Strong oxidizing acne treatments like benzoyl peroxide can reduce the effectiveness of vitamin C if they are used at the same time; they are often recommended for use at different times of day. Read more about other types of Vitamin C: