HoliFrog Sunnyside C Glow Serum Versus Allies of Skin 20% Vitamin C Brighten + Firm Serum

HoliFrog Sunnyside C Glow Serum Versus Allies of Skin 20% Vitamin C Brighten + Firm Serum Detailed comparison of HoliFrog Sunnyside C Glow Serum versus Allies of Skin 20% Vitamin C Brighten + Firm Serum. This brightening serum is formulated around 3-O-Ethyl Ascorbic Acid and Tetrahexyldecyl Ascorbate to brighten dull-looking skin and fade the look of dark spots. This brightening serum is formulated around 3-O-Ethyl Ascorbic Acid and Glutathione to brighten dull-looking skin. Aloe Barbadensis Leaf Juice 3-O-Ethyl Ascorbic Acid Caprylic/Capric Triglyceride Simmondsia Chinensis Seed Oil Tetrahexyldecyl Ascorbate Tranexamic Acid Caprylyl Caprylate/Caprate Glycerin Niacinamide Isomalt Vitis Vinifera Seed Oil Glyceryl Stearate Cetearyl Glucoside Glutathione Tremella Fuciformis Sporocarp Extract Inonotus Obliquus Extract Sodium PCA Tocopherol Water Citric Acid Cetyl Alcohol Phytol Benzyl Alcohol Hydroxyethylcellulose Dehydroacetic Acid Benzoic Acid Sorbic Acid Maltodextrin Disodium Phosphate Polysorbate 60 Sodium Phosphate Aloe Barbadensis Leaf Juice, 3-O-Ethyl Ascorbic Acid, Caprylic/Capric Triglyceride, Simmondsia Chinensis Seed Oil, Tetrahexyldecyl Ascorbate, Tranexamic Acid, Caprylyl Caprylate/Caprate, Glycerin, Niacinamide, Isomalt, Vitis Vinifera Seed Oil, Glyceryl Stearate, Cetearyl Glucoside, Glutathione, Tremella Fuciformis Sporocarp Extract, Inonotus Obliquus Extract, Sodium PCA, Tocopherol, Water, Citric Acid, Cetyl Alcohol, Phytol, Benzyl Alcohol, Hydroxyethylcellulose, Dehydroacetic Acid, Benzoic Acid, Sorbic Acid, Maltodextrin, Disodium Phosphate, Polysorbate 60, Sodium Phosphate Propanediol Benzimidazole Diamond Amidoethyl Urea Carbamoyl Propyl Polymethylsilsesquioxane Dimethyl Isosorbide Helianthus Annuus Seed Wax Polyglyceryl-10 Tristearate Ethoxydiglycol Dicaprylyl Ether Caprylyl Glycol Citrus Aurantium Dulcis Callus Culture Extract Acetyl Cysteine Dimethylmethoxy Chromanol Ergothioneine Gluconolactone Leuconostoc/Radish Root Ferment Filtrate Xanthan Gum Silica Sodium Benzoate Calcium Gluconate Phenoxyethanol Propanediol, Glycerin, 3-O-Ethyl Ascorbic Acid, Benzimidazole Diamond Amidoethyl Urea Carbamoyl Propyl Polymethylsilsesquioxane, Dimethyl Isosorbide, Helianthus Annuus Seed Wax, Polyglyceryl-10 Tristearate, Ethoxydiglycol, Dicaprylyl Ether, Water, Caprylyl Glycol, Citrus Aurantium Dulcis Callus Culture Extract, Glutathione, Acetyl Cysteine, Dimethylmethoxy Chromanol, Ergothioneine, Tocopherol, Gluconolactone, Leuconostoc/Radish Root Ferment Filtrate, Xanthan Gum, Silica, Sodium Benzoate, Calcium Gluconate, Phenoxyethanol 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. Glutathione is a tiny protein-like molecule (a "tripeptide" build from 3 amino acids: glycine, cysteine, and glutamic acid) that your body already makes on its own. Inside your body, it acts as one of the skin's main antioxidants that help fight against free radicals. In skincare, it's best known as a brightening ingredient that slows down tyrosinase, the key enzyme that makes skin pigment. It also nudges the skin toward making a lighter type of pigment instead of a darker one. This is why you'll see it in products aimed at dark spots and uneven tone. A small number of real human trials have found a topical glutathione lotion: The honest caveat is that the current evidence is still thin (few studies, small groups, short timelines). Glutathione also doesn't absorb into skin very easily so results tend to be modest and fade if you stop using it. One thing worth clearing up: The scary side effects you may have heard about come from glutathione injected intravenously, which has real safety concerns. Applying it topically is a completely different thing and has a clean track record. Most human studies used it around 2% (as Glutathione or Glutathione Disulfide) and a 2% oxidized glutathione lotion and a 2% S-acyl glutathione cream are the concentrations with actual clinical data behind them. There's no established "ideal" percentage yet but 1-2% is the evidence-backed range. Allergy-wise, there is very low risk for this ingredient; it was well-tolerated across the topical trials. Only one participant had mild temporary redness that cleared up on its own and another study reported no adverse reactions at all. One trial had ~10% of users drop out for irritation was using a combination cream that also had 10