Paula's Choice C5 Super Boost Moisturizer Versus Summer Fridays CC Me Vitamin C Serum

Paula's Choice C5 Super Boost Moisturizer Versus Summer Fridays CC Me Vitamin C Serum Detailed comparison of Paula's Choice C5 Super Boost Moisturizer US versus Summer Fridays CC Me Vitamin C Serum. This brightening moisturizer is formulated around 3-O-Ethyl Ascorbic Acid and Ascorbyl Glucoside to brighten dull-looking skin. This brightening serum is formulated around Niacinamide and 3-O-Ethyl Ascorbic Acid to brighten dull-looking skin and fade the look of dark spots. Water Dicaprylyl Carbonate 3-O-Ethyl Ascorbic Acid Dimethicone Butylene Glycol Polyglyceryl-6 Distearate Ascorbyl Glucoside Squalane Hydroxyethyl Acrylate/Sodium Acryloyldimethyl Taurate Copolymer Acetyl Sh-Hexapeptide-5 Amide Acetate Citrullus Lanatus Seed Oil Hydrogenated Lecithin Theobroma Cacao Seed Butter Hydrogenated Phosphatidylcholine Pentaerythrityl Tetra-Di-T-Butyl Hydroxyhydrocinnamate Sodium Hyaluronate Oryza Sativa Bran Extract Propanediol Jojoba Esters Tocopherol Acetyl Zingerone Cetyl Palmitate Caprylyl Glycol Cetyl Alcohol Polyglyceryl-3 Beeswax Sodium Hydroxide Sorbitan Olivate Sorbitan Palmitate Helianthus Annuus Extract Ethylhexylglycerin Hexylene Glycol Sodium Phytate Polysorbate 60 Sorbitan Isostearate Lecithin Rosmarinus Officinalis Leaf Extract Glycine Soja Oil Lysolecithin Bacillus Ferment Citric Acid Polyglutamic Acid Beta-Sitosterol Phytic Acid Squalene Phenoxyethanol Sodium Benzoate Potassium Sorbate Water, Dicaprylyl Carbonate, 3-O-Ethyl Ascorbic Acid, Dimethicone, Butylene Glycol, Polyglyceryl-6 Distearate, Ascorbyl Glucoside, Squalane, Hydroxyethyl Acrylate/Sodium Acryloyldimethyl Taurate Copolymer, Acetyl Sh-Hexapeptide-5 Amide Acetate, Citrullus Lanatus Seed Oil, Hydrogenated Lecithin, Theobroma Cacao Seed Butter, Hydrogenated Phosphatidylcholine, Pentaerythrityl Tetra-Di-T-Butyl Hydroxyhydrocinnamate, Sodium Hyaluronate, Oryza Sativa Bran Extract, Propanediol, Jojoba Esters, Tocopherol, Acetyl Zingerone, Cetyl Palmitate, Caprylyl Glycol, Cetyl Alcohol, Polyglyceryl-3 Beeswax, Sodium Hydroxide, Sorbitan Olivate, Sorbitan Palmitate, Helianthus Annuus Extract, Ethylhexylglycerin, Hexylene Glycol, Sodium Phytate, Polysorbate 60, Sorbitan Isostearate, Lecithin, Rosmarinus Officinalis Leaf Extract, Glycine Soja Oil, Lysolecithin, Bacillus Ferment, Citric Acid, Polyglutamic Acid, Beta-Sitosterol, Phytic Acid, Squalene, Phenoxyethanol, Sodium Benzoate, Potassium Sorbate Niacinamide Glycerin Capryloyl Glycerin/Sebacic Acid Copolymer Sodium Citrate Diheptyl Succinate Tocopheryl Acetate Xanthan Gum Tetrasodium Glutamate Diacetate Carbomer Polysorbate 20 Palmitoyl Oligopeptide Palmitoyl Tetrapeptide-7 Camellia Oleifera Leaf Extract Orchis Mascula Flower Extract Caprylic/Capric Triglyceride Cananga Odorata Flower Extract Cucumis Melo Cantalupensis Fruit Extract Eugenia Caryophyllus Flower Extract Pyrus Malus Fruit Extract Prunus Armeniaca Fruit Extract Rosa Gallica Flower Extract Cinnamomum Cassia Bark Extract Jasminum Officinale Flower/Leaf Extract Coffea Arabica Leaf/Seed Extract Camellia Sinensis Leaf Extract Amyl Cinnamal Cinnamyl Alcohol Citronellol Eugenol Hydroxycitronellal Water, Niacinamide, Butylene Glycol, 3-O-Ethyl Ascorbic Acid, Ascorbyl Glucoside, Glycerin, Capryloyl Glycerin/Sebacic Acid Copolymer, Hydroxyethyl Acrylate/Sodium Acryloyldimethyl Taurate Copolymer, Squalane, Sodium Citrate, Phenoxyethanol, Sodium Hydroxide, Citric Acid, Diheptyl Succinate, Tocopheryl Acetate, Xanthan Gum, Tetrasodium Glutamate Diac Be the first to review 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. Ascorbyl Glucoside (AA-2G) is one of the most stable vitamin C derivatives out there. It's made by attaching a glucose molecule to ascorbic acid; this glucose "cap" shields the vitamin C from air, light, heat, and metal ions that normally cause pure ascorbic acid to oxidize. Once on your skin, the enzyme alpha-glucosidase snips off the glucose and gradually releases active ascorbic acid right where it's needed. Basically, it behaves like a slow-release pro-vitamin C with less of a stinging that high-strength ascorbic acid can cause. The research supports the classic vitamin C benefits as well. In lab and human studies, AA-2G slowed down the skin's production of melanin (the pigment behind dark spots) and helped shield skin cells against sun damage better than ascorbyl phosphate. These studies also showed AA-2G released vitamin C over a longer period. A frequently cited manufacturer trial found that a 2% AA-2G face cream significantly improved wrinkle depth and skin roughness after 45 days. And in 2009, a clinical trial showed it meaningfully lightened dark patches on the gums compared to a placebo. There's also collagen-synthesis support (since vitamin C is a required cofactor for that) and an antioxidant effect too. Typical usage is usually between 0.5-5% and most studies/products land around 2%. AA-2G performs best when formulated at a mildly acidic pH (~5-7) which is much gentler than the pH that pure vitamin C demands (~2.5-3.5). Just one thing worth knowing: the in-skin conversation rate is only about 55-60% by weight. So a 5% AA-2G product delivers roughly 2.75-3% of actual active vitamin C. On top of that, skin absorption is relatively low because the ingredient is water-soluble. Butylene Gly