COSRX Skin Barrier Moisturizing Cream Versus La Roche-Posay Lipikar Urea 10% Roughness Smoothing Lotion
This barrier-repair moisturizer is formulated around Panthenol and Ceramide NP to strengthen the skin barrier and hydrate skin.
What's inside
What's inside
Key Ingredients
Benefits
Concerns
Ingredients Side-by-side
Water
Skin ConditioningGlycerin
Humectant
Cetearyl Alcohol
Emollient
Caprylic/Capric Triglyceride
Masking
Cetyl Alcohol
Emollient
Ceteareth-20
CleansingBehentrimonium Methosulfate
SurfactantDimethicone
Emollient
Petrolatum
Emollient
Butylene Glycol
Humectant
Caprylyl Glycol
Emollient
Potassium Phosphate
BufferingEthylhexylglycerin
Skin ConditioningDisodium EDTA
Dipotassium Phosphate
BufferingPanthenol
Skin Conditioning
Betaine
Humectant
Synthetic Wax
Abrasive
Hydrogenated Lecithin
Emulsifying
Squalane
Emollient
Propanediol
Solvent
Sodium PCA
Humectant
Sodium Lactate
Buffering
Stearic Acid
Cleansing
PCA
Humectant
Sodium Hyaluronate
Humectant
Polyglyceryl-10 Stearate
Skin Conditioning
1,2-Hexanediol
Skin Conditioning
Serine
Masking
Alanine
Masking
Glycine
Buffering
Hydrolyzed Hyaluronic Acid
Humectant
Glutamic Acid
Humectant
Lysine Hcl
Skin Conditioning
Threonine
Arginine
Masking
Ceramide NP
Skin Conditioning
Sodium Hyaluronate Crosspolymer
Humectant
Cholesterol
Emollient
Hyaluronic Acid
Humectant
Tocopherol
Antioxidant
Proline
Skin Conditioning
Palmitic Acid
Emollient
Ceramide Ns
Skin Conditioning
Phytosphingosine
Skin Conditioning
Sodium Acetylated Hyaluronate
Humectant
Ceramide AP
Skin Conditioning
Ceramide As
Skin Conditioning
Ceramide EOP
Skin Conditioning
Water, Glycerin, Cetearyl Alcohol, Caprylic/Capric Triglyceride, Cetyl Alcohol, Ceteareth-20, Behentrimonium Methosulfate, Dimethicone, Petrolatum, Butylene Glycol, Caprylyl Glycol, Potassium Phosphate, Ethylhexylglycerin, Disodium EDTA, Dipotassium Phosphate, Panthenol, Betaine, Synthetic Wax, Hydrogenated Lecithin, Squalane, Propanediol, Sodium PCA, Sodium Lactate, Stearic Acid, PCA, Sodium Hyaluronate, Polyglyceryl-10 Stearate, 1,2-Hexanediol, Serine, Alanine, Glycine, Hydrolyzed Hyaluronic Acid, Glutamic Acid, Lysine Hcl, Threonine, Arginine, Ceramide NP, Sodium Hyaluronate Crosspolymer, Cholesterol, Hyaluronic Acid, Tocopherol, Proline, Palmitic Acid, Ceramide Ns, Phytosphingosine, Sodium Acetylated Hyaluronate, Ceramide AP, Ceramide As, Ceramide EOP
Water
Skin ConditioningUrea
Buffering
Glycerin
Humectant
Butyrospermum Parkii Butter
Skin Conditioning
Brassica Campestris Seed Oil
Skin Conditioning
Dicaprylyl Carbonate
EmollientIsopropyl Palmitate
Emollient
Pentylene Glycol
Skin Conditioning
Glycine
Buffering
Cetearyl Alcohol
Emollient
Silica
Abrasive
Stearic Acid
Cleansing
Allantoin
Skin Conditioning
Sorbitan Oleate
Emulsifying
Sorbitan Tristearate
EmulsifyingGlyceryl Stearate
Emollient
PEG-100 Stearate
Surfactant
PEG-20 Methyl Glucose Sesquistearate
Emulsifying
Isohexadecane
EmollientSodium Hydroxide
BufferingSodium Lactate
Buffering
Myristic Acid
Cleansing
Palmitic Acid
Emollient
Mannose
HumectantHydroxyacetophenone
Antioxidant
Hydroxyethylpiperazine Ethane Sulfonic Acid
BufferingCaprylyl Glycol
Emollient
Citric Acid
Buffering
Trisodium Ethylenediamine Disuccinate
Xanthan Gum
EmulsifyingPolysorbate 80
Emulsifying
Acrylamide/Sodium Acryloyldimethyltaurate Copolymer
Emulsion StabilisingAcrylates/C10-30 Alkyl Acrylate Crosspolymer
Emulsion StabilisingTocopherol
Antioxidant
Pentaerythrityl Tetra-Di-T-Butyl Hydroxyhydrocinnamate
Antioxidant
Chlorhexidine Digluconate
Antimicrobial
Water, Urea, Glycerin, Butyrospermum Parkii Butter, Brassica Campestris Seed Oil, Dicaprylyl Carbonate, Isopropyl Palmitate, Pentylene Glycol, Glycine, Cetearyl Alcohol, Silica, Stearic Acid, Allantoin, Sorbitan Oleate, Sorbitan Tristearate, Glyceryl Stearate, PEG-100 Stearate, PEG-20 Methyl Glucose Sesquistearate, Isohexadecane, Sodium Hydroxide, Sodium Lactate, Myristic Acid, Palmitic Acid, Mannose, Hydroxyacetophenone, Hydroxyethylpiperazine Ethane Sulfonic Acid, Caprylyl Glycol, Citric Acid, Trisodium Ethylenediamine Disuccinate, Xanthan Gum, Polysorbate 80, Acrylamide/Sodium Acryloyldimethyltaurate Copolymer, Acrylates/C10-30 Alkyl Acrylate Crosspolymer, Tocopherol, Pentaerythrityl Tetra-Di-T-Butyl Hydroxyhydrocinnamate, Chlorhexidine Digluconate
Reviews
Ingredients Explained
These ingredients are found in both products.
Ingredients higher up in an ingredient list are typically present in a larger amount.
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).
Learn more about Caprylyl GlycolCetearyl 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.
Learn more about Cetearyl AlcoholGlycerin (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 GlycerinGlycine is the smallest amino acid and a key building block of collagen. It's part if your skin's Natural Moisturizing Factor (NMF), or the water-loving molecules in your outermost layer of skin (stratum corneum) that keeps everything hydrated and happy.
A study from 2022 found that an amino acid complex featuring taurine, arginine, and glycine significantly reduced skin irritation, improved redness, and accelerated the skin repair process.
Palmitic Acid is a fatty acid naturally found in our skin and in many plant and animal sources.
In cosmetics, it is usually derived from palm oil. It serves many purposes in skincare, acting as a cleanser, emollient, and emulsifier.
Interestingly, topically applied Palmitic Acid can be elongated into longer chain fatty acids and ceramides. A 2019 study found low levels of Palmitic Acid lead to slower development of cells, suggesting it plays a role in keeping your skin's renewal process on track.
The CIR (Cosmetic Ingredient Review) panel determined it safe as used in cosmetics at concentrations up to 13%. It is non-irritating and non-sensitizing in clinical studies.
The culprit behind fungal acne, the Malassezia yeast, feeds on fatty acids with carbon chain lengths between C11-C24. Palmitic Acid, at C16, falls right into that sweet spot.
In vitro studies have shown that Palmitic Acid is one of the fatty acids that induce rapid Malassezia growth in lab settings.
It's worth noting that what feeds yeast in a lab doesn't necessarily feed it on your face since formulation and your skin's chemistry play a bigger role.
Learn more about Palmitic AcidSodium Lactate is the sodium salt of lactic acid, an AHA. It is a humectant and sometimes used to adjust the pH of a product.
This ingredient is part of our skin's NMF, or natural moisturizing factor. Our NMF is essential for the hydration of our top skin layers and plasticity of skin. NMF also influences our skin's natural acid mantle and pH, which protects our skin from harmful bacteria.
High percentages of Sodium Lactate can have an exfoliating effect.
Fun fact: Sodium Lactate is produced from fermented sugar.
Learn more about Sodium LactateStearic Acid is a fatty acid that is already found in your skin. It's one of the free fatty acids that works alongside ceramides and cholesterols to maintain your barrier.
In cosmetics, it is a multitasker:
Safety-wise, the CIR Expert Panel has concluded it to be safe in cosmetics when formulated to be non-irritating and non-sensitizing.
Free stearic acid is a C18 fatty acid that the Malassezia yeast can substrate, so this ingredient may not be fungal acne safe.
Learn more about Stearic AcidTocopherol is a fat-soluble antioxidant known as Vitamin E.
You'll find this ingredient in the vast majority of skincare (for good reason). It works to neutralize free radicals, or unstable molecules generated by UV exposure, pollution, and other environmental stressors, before they can cause oxidative damage to your skin cells.
Topically applied tocopherol has been shown to protect against UV damage by ramping up the skin's own natural defense enzymes.
It also acts as a skin conditioning agent; some studies show that regular topical use can improve the skin's water-binding capacity over 2-4 weeks.
This ingredient is especially loved for being a team player. When combined with Vitamin C, the photoprotective effect of both ingredients roughly doubles and the combo also helps reduce UV-induced DNA damage.
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.
In formulations, it also serves as a stabilizer that helps protect other oxidation-prone ingredients from degrading.
Concentrations usually range from 0.1-1% in most leave-on products.
Learn more about TocopherolWater. 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
