Skin science article
Paula's Choice C5 Super Boost Eye Cream Versus Clinique All About Eyes™ Rich Eye Cream
Paula's Choice C5 Super Boost Eye Cream Versus Clinique All About Eyes™ Rich Eye Cream This brightening eye moisturizer is formulated around Ascorbyl Glucoside and 3-O-Ethyl Ascorbic Acid to brighten dull-looking skin and soften the look of wrinkles. This anti
Paula's Choice C5 Super Boost Eye Cream Versus Clinique All About Eyes™ Rich Eye Cream
This brightening eye moisturizer is formulated around Ascorbyl Glucoside and 3-O-Ethyl Ascorbic Acid to brighten dull-looking skin and soften the look of wrinkles.
This anti-aging eye moisturizer is formulated around Butyrospermum Parkii Butter and Palmitoyl Oligopeptide to soften the look of wrinkles and hydrate skin.
What's inside
Key Ingredients
Benefits
Concerns
Ingredients Side-by-side
Water
Dicaprylyl Carbonate
Glycerin
Triheptanoin
Ascorbyl Glucoside
3-O-Ethyl Ascorbic Acid
Hydroxyethyl Acrylate/Sodium Acryloyldimethyl Taurate Copolymer
Arachidyl Alcohol
Cetearyl Alcohol
C13-15 Alkane
Ascorbyl Palmitate
Sh-Polypeptide-121
Acetyl Hexapeptide-8
Hyaluronic Acid
Zerumbone
Bacillus Ferment
Tocopherol
Tocopheryl Acetate
Butyrospermum Parkii Butter Unsaponifiables
Oryza Sativa Bran Extract
Rosmarinus Officinalis Leaf Extract
Helianthus Annuus Seed Oil
Helianthus Annuus Seed Extract
Hydrogenated Lecithin
Cetearyl Olivate
Sorbitan Olivate
Behenyl Alcohol
Arachidyl Glucoside
Propanediol
Butylene Glycol
Cetyl Alcohol
Sodium Phytate
Sodium Citrate
Citric Acid
Sodium Metabisulfite
Phenoxyethanol
Caprylyl Glycol
Ethylhexylglycerin
Hexylene Glycol
Sodium Hydroxide
Water, Dicaprylyl Carbonate, Glycerin, Triheptanoin, Ascorbyl Glucoside, 3-O-Ethyl Ascorbic Acid, Hydroxyethyl Acrylate/Sodium Acryloyldimethyl Taurate Copolymer, Arachidyl Alcohol, Cetearyl Alcohol, C13-15 Alkane, Ascorbyl Palmitate, Sh-Polypeptide-121, Acetyl Hexapeptide-8, Hyaluronic Acid, Zerumbone, Bacillus Ferment, Tocopherol, Tocopheryl Acetate, Butyrospermum Parkii Butter Unsaponifiables, Oryza Sativa Bran Extract, Rosmarinus Officinalis Leaf Extract, Helianthus Annuus Seed Oil, Helianthus Annuus Seed Extract, Hydrogenated Lecithin, Cetearyl Olivate, Sorbitan Olivate, Behenyl Alcohol, Arachidyl Glucoside, Propanediol, Butylene Glycol, Cetyl Alcohol, Sodium Phytate, Sodium Citrate, Citric Acid, Sodium Metabisulfite, Phenoxyethanol, Caprylyl Glycol, Ethylhexylglycerin, Hexylene Glycol, Sodium Hydroxide
Butyrospermum Parkii Butter
Hydrogenated Polyisobutene
Phenyl Trimethicone
Polyglyceryl-3 Beeswax
Polybutene
Sucrose
Cetyl Esters
Polymethyl Methacrylate
Isostearyl Neopentanoate
Cetearyl Glucoside
Triticum Vulgare Germ Extract
Hordeum Vulgare Extract
Sigesbeckia Orientalis Extract
PEG-100 Stearate
Coleus Barbatus Root Extract
Betula Alba Bark Extract
Polysilicone-11
Methyl Glucose Sesquistearate
Camellia Sinensis Leaf Extract
Salvia Officinalis Leaf
Glyceryl Polymethacrylate
Faex Extract
Gentiana Lutea Root Extract
Stearic Acid
Milk Protein
Whey Protein
Palmitoyl Oligopeptide
Squalane
Magnesium Ascorbyl Phosphate
Cholesterol
Caffeine
PEG-8
Phytosphingosine
Acrylates/C10-30 Alkyl Acrylate Crosspolymer
Aminomethyl Propanol
Dimethicone
Isomerized Linoleic Acid
Linoleic Acid
Sodium Hyaluronate
1,2-Hexanediol
Decarboxy Carnosine Hcl
Potassium Sulfate
Disodium EDTA
Sodium Dehydroacetate
CI 19140
Mica
CI 77491
CI 77492
CI 77499
CI 77891
Water, Butyrospermum Parkii Butter, Cetearyl Alcohol, Butylene Glycol, Hydrogenated Polyisobutene, Phenyl Trimethicone, Polyglyceryl-3 Beeswax, Polybutene, Sucrose, Cetyl Esters, Polymethyl Methacrylate, Isostearyl Neopentanoate, Glycerin, Cetearyl Glucoside, Tocopheryl Acetate, Triticum Vulgare Germ Extract, Hordeum Vulgare Extract, Sigesbeckia Orientalis Extract, PEG-100 Stearate, Coleus Barbatus Root Extract, Betula Alba Bark Extract, Polysilicone-11, Methyl Glucose Sesquistearate, Camellia Sinensis Leaf Extract, Salvia Officinalis Leaf, Glyceryl Polymethacrylate, Faex Extract, Gentiana Lutea Root Extract, Stearic Acid, Milk Protein, Whey Protein, Palmitoyl Oligopeptide, Squalane, Magnesium Ascorbyl Phosphate, Cholesterol, Caffeine, PEG-8, Phytosphingosine, Acrylates/C10-30 Alkyl Acrylate Crosspolymer, Aminomethyl Propanol, Dimethicone, Isomerized Linoleic Acid, Linoleic Acid, Sodium Hyaluronate, 1,2-Hexanediol, Decarboxy Carnosine Hcl, Potassium Sulfate, Caprylyl Glycol, Disodium EDTA, Sodium Dehydroacetate, Phenoxyethanol, CI 19140, Mica, CI 77491, CI 77492, CI 77499, CI 77891
Reviews
Alternatives
Ingredients Explained
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.
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).
Cetearyl alcohol is a waxy mixture of two fatty alcohols: cetyl alcohol and stearyl alcohol. It is an emollient and emulsifier.
Despite having "alcohol" in its name, it has nothing to do with drying solvent alcohols; the FDA also allows "alcohol-free" products to contain fatty alcohols like this ingredient.
It plays several roles in a formula:
Typical use levels for this ingredient sit around 1-10% and the Cosmetic Ingredient Review Expert Panel has affirmed safety at concentrations up to 25% in leave-on products.
Multiple assessments have found it to be non-irritating and non-sensitizing to most people.
However, there have been some cases of allergic contact dermatitis in patients with chronically compromised skin barriers.
Cetearyl alcohol has a comedogenic rating of 2 and irritancy rating of 1. Both of these numbers come from the 1989 study that used rabbit ears; a "2" means mildly comedogenic and a "1" means low irritancy.
Here's the catch: rabbit skin is more sensitive than human skin and throws a lot of false positives. A 1996 reappraisal found that ingredients rated 1-2 in the rabbit ear tests are generally safe for humans.
Remember comedogenic ratings are unable to assess the entire formula of a product or how it will react on your skin. Just be sure to patch test if you are unsure about certain ingredients.
This ingredient is not fungal acne safe. Cetearyl alcohol is a fatty alcohol with chain lengths that fall within the range that Malassezia can metabolize.
A 2019 study has also observed Malassezia growth in the presence of this ingredient, confirming it to be not-fungal acne safe.
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.
Phenoxyethanol is one of the most widely used preservatives in skincare (and for good reason!).
It has a large spectrum of antimicrobial activity and especially effective bacteria, yeast, and mold while only having a weak effect on your skin's natural microbiome.
On a cellular level, it disrupts the cell membranes of microbes by poking holes that make the cell leak. This shuts down the chemical reactions the microbe needs to make energy so it can no longer survive.
Another perk of this ingredient is that it stays functional across a wide pH range (3-10).
You'll often see it paired with boosters like Ethylhexylglycerin; one study showed that a 1:9 ratio of Ethylhexylglycerin to Phenoxyethanol damages bacterial membranes as effectively as doubling the Phenoxyethanol concentration on its own.
Typical use concentrations range from 0.3-1% depending on the formula, and this ingredient is capped at 1% int the EU.
Safety-wise, the fear mongering does not hold up to the evidence. The EU's Scientific Committee on Consumer Safety and FDA consider it safe as a preservative at up to 1%, including for children of all ages.
Adverse systemic effects only showed up in animal studies at exposures roughly 200x higher than what people get from cosmetics. And despite its very widespread use, this ingredient is a rare sensitizer and allergic reactions are uncommon.
Tocopheryl Acetate is a stable, shelf-friendly form of vitamin E.
Formulators love it because plain vitamin E oxidizes quickly once it hits air. This acetate version stays stable and resists going off, helping to extend a product's shelf life.
It's actually inactive on its own and works like a slow-release "storage" form; the enzymes in your skin called esterases gradually convert it into active vitamin E over time.
One in vivo study showed 5% of the acetate in the living layer of the epidermis converted to vitamin E after 5 days of application. This study also found the skin gained protection against UV damage even though the conversion was slow and small.
Once converted, vitamin E acts as a skin's main fat-soluble antioxidant that fights free radicals to protect skin from damage.
Topical vitamin E generally boosts the skin's photoprotection, and it reduced UV-damage in animal models.
This ingredient has some brightening potential but it's more of a prevention ingredient than spot-fader. Cell studies show it can slow down melanin production but it's worth noting that it's not the most powerful brightener out there.
Overall, it has a pretty solid safety profile and has been found to be non-irritating and non-comedogenic. Allergic reactions may happen but stay rare due to how widely the ingredient gets used.
The concentration will vary depending on the formula; industry data shows 0.1% in baby lotions, 3% in lipsticks, and 5% in foot powders. You can also find this ingredient at 100% in a pure vitamin E oil.
Most leave-on skincare keeps it at the lower end, often between 0.5-1%.
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!