Skin science article
The Ordinary Caffeine Solution 5% + EGCG Versus Q + A Vitamin C Eye Cream
The Ordinary Caffeine Solution 5% + EGCG Versus Q + A Vitamin C Eye Cream This calming eye moisturizer is formulated around Caffeine and Epigallocatechin Gallatyl Glucoside to calm redness and soften the look of wrinkles. This brightening eye moisturizer is fo
The Ordinary Caffeine Solution 5% + EGCG Versus Q + A Vitamin C Eye Cream
This calming eye moisturizer is formulated around Caffeine and Epigallocatechin Gallatyl Glucoside to calm redness and soften the look of wrinkles.
This brightening eye moisturizer is formulated around Ascorbic Acid and Niacinamide to brighten dull-looking skin and soften the look of wrinkles.
What's inside
Key Ingredients
Benefits
Concerns
Ingredients Side-by-side
Water
Caffeine
Maltodextrin
Glycerin
Propanediol
Epigallocatechin Gallatyl Glucoside
Gallyl Glucoside
Hyaluronic Acid
Oxidized Glutathione
Melanin
Glycine Soja Seed Extract
Pentylene Glycol
Hydroxyethylcellulose
Polyacrylate Crosspolymer-6
Xanthan Gum
Lactic Acid
Dehydroacetic Acid
Trisodium Ethylenediamine Disuccinate
Propyl Gallate
Dimethyl Isosorbide
Benzyl Alcohol
1,2-Hexanediol
Ethylhexylglycerin
Phenoxyethanol
Caprylyl Glycol
Water, Caffeine, Maltodextrin, Glycerin, Propanediol, Epigallocatechin Gallatyl Glucoside, Gallyl Glucoside, Hyaluronic Acid, Oxidized Glutathione, Melanin, Glycine Soja Seed Extract, Pentylene Glycol, Hydroxyethylcellulose, Polyacrylate Crosspolymer-6, Xanthan Gum, Lactic Acid, Dehydroacetic Acid, Trisodium Ethylenediamine Disuccinate, Propyl Gallate, Dimethyl Isosorbide, Benzyl Alcohol, 1,2-Hexanediol, Ethylhexylglycerin, Phenoxyethanol, Caprylyl Glycol
Caprylic/Capric Triglyceride
C14-22 Alcohols
Simmondsia Chinensis Seed Oil
Rhus Verniciflua Peel Cera
Butyrospermum Parkii Butter
Hydroxyethyl Acrylate/Sodium Acryloyldimethyl Taurate Copolymer
Volcanic Soil
Ascorbic Acid
Niacinamide
Glycogen
Malpighia Emarginata Fruit Extract
Helianthus Annuus Seed Oil
Amylopectin
O-Cymen-5-Ol
Polysorbate 60
Sorbitan Isostearate
Glucose
C12-20 Alkyl Glucoside
Tocopherol
Citric Acid
Water, Caprylic/Capric Triglyceride, Propanediol, C14-22 Alcohols, Simmondsia Chinensis Seed Oil, Rhus Verniciflua Peel Cera, Butyrospermum Parkii Butter, Glycerin, Hydroxyethyl Acrylate/Sodium Acryloyldimethyl Taurate Copolymer, Volcanic Soil, Ascorbic Acid, Niacinamide, Glycogen, Hyaluronic Acid, Malpighia Emarginata Fruit Extract, Helianthus Annuus Seed Oil, Amylopectin, O-Cymen-5-Ol, Polysorbate 60, Sorbitan Isostearate, Glucose, Caprylyl Glycol, Xanthan Gum, C12-20 Alkyl Glucoside, 1,2-Hexanediol, Ethylhexylglycerin, Tocopherol, Citric Acid
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Alternatives
Ingredients Explained
These ingredients are found in both products.
Ingredients higher up in an ingredient list are typically present in a larger amount.
1,2-Hexanediol is a synthetic liquid and another multi-functional powerhouse.
It is a:
Humectant, drawing moisture into the skin
Emollient, helping to soften skin
Solvent, dispersing and stabilizing formulas
Preservative booster, enhancing the antimicrobial activity of other preservatives
Caprylyl Glycol is a humectant, skin conditioner, emollient, and preservative booster derived from either caprylic acid or synthetically created.
Typical use levels vary from 0.3-1% as a preservative booster and go up to 2% to condition skin.
Because it is not a free-fatty acid, this ingredient is fungal acne safe (there's nothing for Malassezia to feed on).
Ethylhexylglycerin is created from glycerin. It is a multitasker ingredient that:
The CIR Expert Panel found minimal skin absorption or sensitization of any kind in a safety assessment. Though this ingredient is considered well-tolerated, a small number of cases of allergic dermatitis have been published since 2002. Just be sure to patch test if you are unsure.
Industry-reported use ranges from 8% in rinse-off products and 2% in leave-on formulations.
Glycerin (or glycerol) is a compound naturally found in your skin. It's a powerhouse humectant that pulls water into the stratum corneum.
Topically, glycerin does several things at once:
Your skin makes glycerin on its own (mostly from sebaceous oil breakdown) and shuttles it to your outermost layer of skin, or your epidermis, via aquaporin-3.
Aquaporin-3 is a transporter that is essential for normal skin hydration, elasticity, and repair. Interestingly, mice lacking in AQP3 have dry and less elastic skin that can be fully corrected with glycerin.
This ingredient is non-irritating, plays well with almost every ingredient, and works across all skin types. Typical use is anywhere between 3-10% but can go up to 79% in some leave-on products.
Just know very high concentrations (>40%) can feel tacky in low humidity.
Glycerin is the name for this ingredient in American English. British English uses Glycerol/Glycerine.
Hyaluronic acid (HA) is a glycosaminoglycan (basically a long sugar chain) that your skin already makes on its own. In your skin, HA lives in the extracellular matrix and acts as the body's moisture reservoir.
Topically, HA is a humectant that binds water and helps skin look more plump, smooth, and hydrated.
The only catch is that HA isn't a single thing; it actually comes in a wide range of molecular weights (~50 - 2,000+ kDA) and size matters.
Some clinical evidence links low molecular weight versions to improved wrinkle depth, elasticity, anti-inflammatory effects, and barrier repair.
This is why the best HA serums blend the two sizes together so you get the best of both worlds.
The majority of cosmetic HA is produced by bacterial fermentation, typically using Streptococcus or Bacillus strains. Typical use levels in skincare sit around 0.1-2%.
A clinical study using a 0.2% low-molecular weight HA gel showed improvement in facial seborrheic dermatitis with excellent tolerance.
These are some other common types of Hyaluronic Acid:
Propanediol is an all-star ingredient. It softens, hydrates, and smooths the skin.
It’s often used to:
Propanediol is not likely to cause sensitivity and considered safe to use. It is derived from corn or petroleum with a clear color and no scent.
Water. It's the most common cosmetic ingredient of all. You'll usually see it at the top of ingredient lists, meaning that it makes up the largest part of the product.
So why is it so popular? Water most often acts as a solvent - this means that it helps dissolve other ingredients into the formulation.
You'll also recognize water as that liquid we all need to stay alive. If you see this, drink a glass of water. Remember to stay hydrated!
Xanthan gum is used as a stabilizer and thickener within cosmetic products. It helps give products a sticky, thick feeling - preventing them from being too runny.
On the technical side of things, xanthan gum is a polysaccharide - a combination consisting of multiple sugar molecules bonded together.
Xanthan gum is a pretty common and great ingredient. It is a natural, non-toxic, non-irritating ingredient that is also commonly used in food products.