Skin science article
La Roche-Posay Toleriane Double Repair Face Moisturizer Versus The INKEY List Bio-Active Ceramide Repairing and Plumping Moisturizer
La Roche-Posay Toleriane Double Repair Face Moisturizer Versus The INKEY List Bio-Active Ceramide Repairing and Plumping Moisturizer This barrier-repair moisturizer is formulated around Squalane and Niacinamide to strengthen the skin barrier and hydrate skin.
La Roche-Posay Toleriane Double Repair Face Moisturizer Versus The INKEY List Bio-Active Ceramide Repairing and Plumping Moisturizer
This barrier-repair moisturizer is formulated around Squalane and Niacinamide to strengthen the skin barrier and hydrate skin.
This barrier-repair moisturizer is formulated around Butyrospermum Parkii Butter and Ceramide NP to strengthen the skin barrier and hydrate skin.
What's inside
Key Ingredients
Benefits
Concerns
Ingredients Side-by-side
Water
Glycerin
Squalane
Dimethicone
Zea Mays Starch
Niacinamide
Ammonium Polyacryloyldimethyl Taurate
Myristyl Myristate
Stearic Acid
Ceramide NP
Potassium Cetyl Phosphate
Glyceryl Stearate Se
Sodium Hydroxide
Myristic Acid
Palmitic Acid
Capryloyl Glycine
Caprylyl Glycol
Xanthan Gum
Water, Glycerin, Squalane, Dimethicone, Zea Mays Starch, Niacinamide, Ammonium Polyacryloyldimethyl Taurate, Myristyl Myristate, Stearic Acid, Ceramide NP, Potassium Cetyl Phosphate, Glyceryl Stearate Se, Sodium Hydroxide, Myristic Acid, Palmitic Acid, Capryloyl Glycine, Caprylyl Glycol, Xanthan Gum
Butyrospermum Parkii Butter
C12-15 Alkyl Benzoate
Propanediol
Polysilicone-11
C10-18 Triglycerides
Caprylic/Capric Triglyceride
Pentaerythrityl Tetraisostearate
Cetearyl Olivate
Sorbitan Olivate
Cetyl Alcohol
Phenoxyethanol
Polyacrylate-13
Hydrogenated Polyisobutene
Ethylhexylglycerin
Polyglyceryl-10 Laurate
Ethylhexyl Palmitate
Laureth-12
Sorbitan Isostearate
Hdi/Trimethylol Hexyllactone Crosspolymer
Polymethylsilsesquioxane
Citric Acid
Water, Glycerin, Butyrospermum Parkii Butter, C12-15 Alkyl Benzoate, Propanediol, Polysilicone-11, C10-18 Triglycerides, Caprylic/Capric Triglyceride, Pentaerythrityl Tetraisostearate, Cetearyl Olivate, Sorbitan Olivate, Cetyl Alcohol, Phenoxyethanol, Ceramide NP, Polyacrylate-13, Hydrogenated Polyisobutene, Ethylhexylglycerin, Polyglyceryl-10 Laurate, Ethylhexyl Palmitate, Laureth-12, Sorbitan Isostearate, Hdi/Trimethylol Hexyllactone Crosspolymer, Polymethylsilsesquioxane, Citric Acid, Sodium Hydroxide
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.
Ceramide NP (formerly known as Ceramide 3) is one of the skin's naturally occurring lipids.
Since ceramides are the major lipid components of the skin, they are crucial for maintaining skin barrier and hydration. Ceramide NP most closely mirrors the dominant kind in human skin amongst ceramide subtypes.
This ceramide works by slotting into gaps within the stratum corneum's lipid matrix to limit trans-epidermal water loss (TEWL) and shield the skin against external irritants.
A study with 312 patients found that using a ceramide-containing routine for 4 weeks reduced the severity of atopic dermatitis by over 61%.
Another clinical study in subjects aged 60 and older found that a ceramide body wash and moisturizer improved skin dryness and itchy skin in 15 days.
Overall, ceramides are considered non-irritating and safety tests have found little to no observable adverse effects from using this ingredient.
Ceramide NP is usually sourced from plants (like soybean or rice bran), or produced synthetically.
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.
Sodium 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.
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!