The INKEY List Succinic Acid Acne Treatment Versus La Roche-Posay Effaclar Duo+ Global Acne Treatment
This acne treatment is formulated around Colloidal Sulfur and Salicylic Acid to clear breakouts and refine the look of pores.
This acne treatment is formulated around Niacinamide and Zinc PCA to clear breakouts and balance excess oil.
What's inside
What's inside
Key Ingredients
Benefits
Concerns
Ingredients Side-by-side
Water
Skin ConditioningCaprylic/Capric Triglyceride
Masking
Glyceryl Stearate Se
Emulsifying
Stearic Acid
Cleansing
Cetearyl Alcohol
Emollient
Colloidal Sulfur
Antimicrobial
Glycerin
Humectant
Succinic Acid
BufferingHydroxyethyl Acrylate/Sodium Acryloyldimethyl Taurate Copolymer
Emulsion StabilisingSalicylic Acid
Masking
Phenoxyethanol
Preservative
Squalane
Emollient
Benzyl Alcohol
Perfuming
Sodium Hyaluronate
Humectant
Polysorbate 60
Emulsifying
Ethylhexylglycerin
Skin ConditioningSodium Hydroxide
BufferingDehydroacetic Acid
Preservative
Malachite Extract
Antioxidant
Sorbitan Isostearate
Emulsifying
Trisodium Ethylenediamine Disuccinate
ChelatingCI 75810
Cosmetic ColorantWater, Caprylic/Capric Triglyceride, Glyceryl Stearate Se, Stearic Acid, Cetearyl Alcohol, Colloidal Sulfur, Glycerin, Succinic Acid, Hydroxyethyl Acrylate/Sodium Acryloyldimethyl Taurate Copolymer, Salicylic Acid, Phenoxyethanol, Squalane, Benzyl Alcohol, Sodium Hyaluronate, Polysorbate 60, Ethylhexylglycerin, Sodium Hydroxide, Dehydroacetic Acid, Malachite Extract, Sorbitan Isostearate, Trisodium Ethylenediamine Disuccinate, CI 75810
Water
Skin ConditioningGlycerin
Humectant
Dimethicone
Emollient
Isocetyl Stearate
Emollient
Niacinamide
Smoothing
Isopropyl Lauroyl Sarcosinate
Skin ConditioningSilica
Abrasive
Ammonium Polyacryloyldimethyl Taurate
Emulsion StabilisingMethyl Methacrylate Crosspolymer
Sodium Hydroxide
BufferingPoloxamer 338
EmulsifyingPolysorbate 80
Emulsifying
Mannose
HumectantXanthan Gum
EmulsifyingZinc PCA
Humectant
Isohexadecane
Emollient2-Oleamido-1,3-Octadecanediol
Skin ConditioningCapryloyl Salicylic Acid
Exfoliating
Caprylyl Glycol
Emollient
Piroctone Olamine
Preservative
Myristyl Myristate
Emollient
Acrylamide/Sodium Acryloyldimethyltaurate Copolymer
Emulsion StabilisingSorbitan Oleate
Emulsifying
Disodium EDTA
ChelatingPotassium Cetyl Phosphate
EmulsifyingVitreoscilla Ferment
Skin Conditioning
Aluminum Starch Octenylsuccinate
Absorbent
Glyceryl Stearate Se
Emulsifying
Parfum
Masking
Water, Glycerin, Dimethicone, Isocetyl Stearate, Niacinamide, Isopropyl Lauroyl Sarcosinate, Silica, Ammonium Polyacryloyldimethyl Taurate, Methyl Methacrylate Crosspolymer, Sodium Hydroxide, Poloxamer 338, Polysorbate 80, Mannose, Xanthan Gum, Zinc PCA, Isohexadecane, 2-Oleamido-1,3-Octadecanediol, Capryloyl Salicylic Acid, Caprylyl Glycol, Piroctone Olamine, Myristyl Myristate, Acrylamide/Sodium Acryloyldimethyltaurate Copolymer, Sorbitan Oleate, Disodium EDTA, Potassium Cetyl Phosphate, Vitreoscilla Ferment, Aluminum Starch Octenylsuccinate, Glyceryl Stearate Se, Parfum
Reviews
Ingredients Explained
These ingredients are found in both products.
Ingredients higher up in an ingredient list are typically present in a larger amount.
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.
Learn more about GlycerinGlyceryl Stearate SE is a self-emulsifying (SE) form of Glyceryl Stearate. It comes with a small amount of soap (usually potassium or sodium stearate) that gives it the "SE" part.
That soap lets it pull oil and water together on its own which is why it shows up as an emulsifier, thickener, and emollient.
Industry survey data shows this ingredient is used around 1-5% but Glyceryl Stearate goes as high at 17% in a leave-on deodorant.
Safety-wise, it's pretty boring: it's been deemed safe for topical use in 1982 and again most recently in 2021 by the CIR. Human repeat insult patch tests come back non-irritating, non-sensitizing, non-phototoxic, and non-photoallergenic.
This ingredient does carry a comedogenic rating of 3 from the old rabbit-ear assay. Just remember testing finished products in humans showed that formulas built with "comedogenic" ingredients are not necessarily comedogenic themselves. It's worth patch testing if you're breakout prone, and always listen to your skin.
The Malassezia yeast can potentially metabolize the stearic acid in this ingredient, so it may not be fungal acne safe.
Allergy is rare: a 310-patient patch test study of common emulsifiers found this ingredient was not a meaningful reactor. Isolated case reports do exist so a true contact allergy is possible but uncommon.
Learn more about Glyceryl Stearate SeSodium 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
