La Roche-Posay Toleriane Dermallergo Ultra Soothing Repair Moisturizer Versus La Roche-Posay Hydraphase Intense Serum with Hyaluronic Acid
This barrier-repair moisturizer is formulated around Squalane and Butyrospermum Parkii Butter to strengthen the skin barrier and calm redness.
This hydrating serum is formulated around Hydrolyzed Hyaluronic Acid to hydrate skin.
What's inside
What's inside
Key Ingredients
Benefits
Concerns
Ingredients Side-by-side
Water
Skin ConditioningIsocetyl Stearate
Emollient
Squalane
Emollient
Butyrospermum Parkii Butter
Skin Conditioning
Dimethicone
Emollient
Glycerin
Humectant
Zea Mays Starch
Absorbent
Pentylene Glycol
Skin Conditioning
Butylene Glycol
Humectant
Glyceryl Stearate
Emollient
PEG-100 Stearate
Surfactant
Cetyl Alcohol
Emollient
Salvia Miltiorrhiza Root Extract
Skin ConditioningDimethiconol
Emollient
Sodium Hydroxide
BufferingSphingomonas Ferment Extract
Skin Conditioning
Caprylyl Glycol
Emollient
Citric Acid
Buffering
Acetyl Dipeptide-1 Cetyl Ester
Skin Conditioning
Acrylates/C10-30 Alkyl Acrylate Crosspolymer
Emulsion StabilisingWater, Isocetyl Stearate, Squalane, Butyrospermum Parkii Butter, Dimethicone, Glycerin, Zea Mays Starch, Pentylene Glycol, Butylene Glycol, Glyceryl Stearate, PEG-100 Stearate, Cetyl Alcohol, Salvia Miltiorrhiza Root Extract, Dimethiconol, Sodium Hydroxide, Sphingomonas Ferment Extract, Caprylyl Glycol, Citric Acid, Acetyl Dipeptide-1 Cetyl Ester, Acrylates/C10-30 Alkyl Acrylate Crosspolymer
Water
Skin ConditioningButylene Glycol
Humectant
Alcohol Denat.
Antimicrobial
Glycerin
Humectant
Bis-PEG-18 Methyl Ether Dimethyl Silane
EmollientParaffinum Liquidum
Emollient
Carbomer
Emulsion StabilisingSodium Hydroxide
BufferingArginine PCA
HumectantSerine
Masking
Ascorbyl Glucoside
Antioxidant
Ammonium Polyacryloyldimethyl Taurate
Emulsion StabilisingHydrolyzed Hyaluronic Acid
Humectant
Xanthan Gum
EmulsifyingPhenoxyethanol
Preservative
Parfum
Masking
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 GlycolGlycerin (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 GlycerinSodium Hydroxide is also known as lye or caustic soda. It is used to adjust the pH of products; many ingredients require a specific pH to be effective.
In small amounts, sodium hydroxide is considered safe to use. However, large amounts may cause chemical burns due to its high alkaline.
Your skin has a natural pH and acid mantle. This acid mantle helps prevent harmful bacteria from breaking through. The acid mantle also helps keep your skin hydrated.
"Alkaline" refers to a high pH level. A low pH level would be considered acidic.
Learn more about Sodium HydroxideWater. 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
