Paula's Choice 1% Retinol Treatment Versus Kiehl's Fast Release Wrinkle-Reducing 0.3% Retinol Night Serum
What's inside
What's inside
Key Ingredients
Benefits
Concerns
Ingredients Side-by-side
Water
Skin ConditioningDimethicone
Emollient
Glycerin
Humectant
Butylene Glycol
Humectant
Isononyl Isononanoate
EmollientCastor Isostearate Succinate
Skin Conditioning
Glyceryl Stearate
Emollient
C12-15 Alkyl Benzoate
AntimicrobialDimethicone Crosspolymer
Emulsion Stabilising
PEG-33
HumectantPolysorbate 20
Emulsifying
Behenyl Alcohol
Emollient
PEG-100 Stearate
Pentaerythrityl Tetraisostearate
Emollient
Polymethylsilsesquioxane
Tetrahexyldecyl Ascorbate
Antioxidant
Retinol
Skin Conditioning
Ceramide Ng
Skin Conditioning
Palmitoyl Tetrapeptide-7
Skin Conditioning
Palmitoyl Hexapeptide-12
Skin Conditioning
Sodium Hyaluronate
Humectant
Dipotassium Glycyrrhizate
Humectant
Glycyrrhiza Glabra Root Extract
Bleaching
Avena Sativa Kernel Extract
Abrasive
Arctium Lappa Seed Oil
Emollient
Salix Alba Extract
Skin ConditioningGlycine Soja Sterols
Emollient
Lecithin
Emollient
Allantoin
Skin Conditioning
Tocopheryl Acetate
Antioxidant
Hydrolyzed Soy Protein
Humectant
Sorbitan Laurate
Emulsifying
Acetyl Dipeptide-1 Cetyl Ester
Skin Conditioning
Disodium EDTA
Hydroxyethylcellulose
Emulsion StabilisingPalmitoyl Tripeptide-1
Skin Conditioning
Sodium Hydroxide
BufferingTribehenin
Emollient
Caprylyl Glycol
Emollient
Ethylhexylglycerin
Skin ConditioningPentylene Glycol
Skin Conditioning
PEG-75 Shea Butter Glycerides
Emulsifying
PPG-12/Smdi Copolymer
EmollientPEG-10 Phytosterol
EmulsifyingPEG-8 Dimethicone
Emulsifying
PEG-14
HumectantMagnesium Aluminum Silicate
Absorbent
Arachidyl Glucoside
EmulsifyingArachidyl Alcohol
Emollient
Sclerotium Gum
Emulsion StabilisingCarbomer
Emulsion StabilisingPhenoxyethanol
Preservative
Benzoic Acid
Masking
Water, Dimethicone, Glycerin, Butylene Glycol, Isononyl Isononanoate, Castor Isostearate Succinate, Glyceryl Stearate, C12-15 Alkyl Benzoate, Dimethicone Crosspolymer, PEG-33, Polysorbate 20, Behenyl Alcohol, PEG-100 Stearate, Pentaerythrityl Tetraisostearate, Polymethylsilsesquioxane, Tetrahexyldecyl Ascorbate, Retinol, Ceramide Ng, Palmitoyl Tetrapeptide-7, Palmitoyl Hexapeptide-12, Sodium Hyaluronate, Dipotassium Glycyrrhizate, Glycyrrhiza Glabra Root Extract, Avena Sativa Kernel Extract, Arctium Lappa Seed Oil, Salix Alba Extract, Glycine Soja Sterols, Lecithin, Allantoin, Tocopheryl Acetate, Hydrolyzed Soy Protein, Sorbitan Laurate, Acetyl Dipeptide-1 Cetyl Ester, Disodium EDTA, Hydroxyethylcellulose, Palmitoyl Tripeptide-1, Sodium Hydroxide, Tribehenin, Caprylyl Glycol, Ethylhexylglycerin, Pentylene Glycol, PEG-75 Shea Butter Glycerides, PPG-12/Smdi Copolymer, PEG-10 Phytosterol, PEG-8 Dimethicone, PEG-14, Magnesium Aluminum Silicate, Arachidyl Glucoside, Arachidyl Alcohol, Sclerotium Gum, Carbomer, Phenoxyethanol, Benzoic Acid
Water
Skin ConditioningGlycerin
Humectant
Propanediol
Solvent
Butylene Glycol
Humectant
Glycereth-26
Humectant
Panthenol
Skin Conditioning
1,2-Hexanediol
Skin Conditioning
Polyglycerin-3
Humectant
C12-14 Pareth-12
EmulsifyingPhenoxyethanol
Preservative
Caprylyl Glycol
Emollient
Ammonium Acryloyldimethyltaurate/Vp Copolymer
Betaine
Humectant
Xanthan Gum
EmulsifyingEthylhexylglycerin
Skin ConditioningAdenosine
Skin Conditioning
Carbomer
Emulsion StabilisingGlyceryl Acrylate/Acrylic Acid Copolymer
HumectantTromethamine
BufferingGlycereth-25 PCA Isostearate
Emulsifying
T-Butyl Alcohol
Perfuming
Tocopherol
Antioxidant
Water, Glycerin, Propanediol, Butylene Glycol, Glycereth-26, Panthenol, 1,2-Hexanediol, Polyglycerin-3, C12-14 Pareth-12, Phenoxyethanol, Caprylyl Glycol, Ammonium Acryloyldimethyltaurate/Vp Copolymer, Betaine, Xanthan Gum, Ethylhexylglycerin, Adenosine, Carbomer, Glyceryl Acrylate/Acrylic Acid Copolymer, Tromethamine, Glycereth-25 PCA Isostearate, T-Butyl Alcohol, Tocopherol
Reviews
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.
Learn more about Butylene GlycolCaprylyl 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 or alcohol, this ingredient is fungal acne safe (there's nothing for Malassezia to feed on).
Learn more about Caprylyl GlycolCarbomer is a high-molecular weight polymer of acrylic acid. It is used to form gels and thicken formulas.
Due to its large molecular size, carbomer has minimal skin penetration and is considered an inert ingredient.
A high amount of carbomer can cause pilling or balling up of products. Don't worry, most products contain 1% or less of carbomer.
Learn more about CarbomerEthylhexylglycerin 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.
Learn more about EthylhexylglycerinGlycerin (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.
Learn more about GlycerinPhenoxyethanol is a preservative that has germicide, antimicrobial, and aromatic properties. Studies show that phenoxyethanol can prevent microbial growth. By itself, it has a scent that is similar to that of a rose.
It's often used in formulations along with Caprylyl Glycol to preserve the shelf life of products.
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!
Learn more about Water
