La Roche-Posay Effaclar Duo+M Versus Kiehl's Breakout Control Blemish Treatment Facial Lotion - Germany
Updated on February 17, 2025
Overview
What they are
These products are both reef safe . They have a total of 7 ingredients in common
Cool Features
They both contain BHA, exfoliants and niacinamide
Suited For
They're both likely to be good for fighting acne, anti aging, dry skin, brightening skin, sensitive skin, oily skin, reducing pores, scar healing and dark spots
Free From
They both do not contain any harsh alcohols, oils, parabens or sulfates
What's Inside
They both contain fragrances and silicones
We independently verify ingredients, and our claims are backed by peer-reviewed research. Spot a product that needs an update? Let us know.
Ingredient Info
La Roche-Posay Effaclar Duo+M 35 ingredients
Kiehl's Breakout Control Blemish Treatment Facial Lotion 22 ingredients
About this product
About this product
At a glance
Click on any of the items below to learn more
La Roche-Posay Effaclar Duo+M 35 ingredients
Kiehl's Breakout Control Blemish Treatment Facial Lotion 22 ingredients
Key Ingredients
Benefits
Concerns
Key Ingredients
Benefits
Concerns
Ingredients Side-by-side
Water
Skin ConditioningGlycerin
Humectant
Dimethicone
Emollient
Isocetyl Stearate
Emollient
Niacinamide
Smoothing
Isopropyl Lauroyl Sarcosinate
Skin ConditioningSilica
Abrasive
Ammonium Polyacryloyldimethyl Taurate
Emulsion StabilisingOryza Sativa Starch
AbsorbentPunica Granatum Pericarp Extract
Skin ConditioningPotassium Cetyl Phosphate
EmulsifyingSorbitan Oleate
Emulsifying
Zinc PCA
Humectant
Glyceryl Stearate Se
Emulsifying
Isohexadecane
EmollientSodium Hydroxide
BufferingMyristyl Myristate
Emollient
2-Oleamido-1,3-Octadecanediol
Skin ConditioningMannose
HumectantPoloxamer 338
EmulsifyingPropanediol
SolventHydroxyethoxyphenyl Butanone
Preservative
Capryloyl Salicylic Acid
Exfoliating
Caprylyl Glycol
EmollientVitreoscilla Ferment
Skin ConditioningCitric Acid
Buffering
Trisodium Ethylenediamine Disuccinate
Maltodextrin
AbsorbentXanthan Gum
EmulsifyingPentylene Glycol
Skin ConditioningPolysorbate 80
Emulsifying
Acrylamide/Sodium Acryloyldimethyltaurate Copolymer
Emulsion StabilisingSalicylic Acid
Masking
Piroctone Olamine
Preservative
Parfum
Masking
Water, Glycerin, Dimethicone, Isocetyl Stearate, Niacinamide, Isopropyl Lauroyl Sarcosinate, Silica, Ammonium Polyacryloyldimethyl Taurate, Oryza Sativa Starch, Punica Granatum Pericarp Extract, Potassium Cetyl Phosphate, Sorbitan Oleate, Zinc PCA, Glyceryl Stearate Se, Isohexadecane, Sodium Hydroxide, Myristyl Myristate, 2-Oleamido-1,3-Octadecanediol, Mannose, Poloxamer 338, Propanediol, Hydroxyethoxyphenyl Butanone, Capryloyl Salicylic Acid, Caprylyl Glycol, Vitreoscilla Ferment, Citric Acid, Trisodium Ethylenediamine Disuccinate, Maltodextrin, Xanthan Gum, Pentylene Glycol, Polysorbate 80, Acrylamide/Sodium Acryloyldimethyltaurate Copolymer, Salicylic Acid, Piroctone Olamine, Parfum
Water
Skin ConditioningAloe Barbadensis Leaf Juice
Skin Conditioning
Di-C12-13 Alkyl Malate
EmollientNiacinamide
Smoothing
Cyclohexasiloxane
Emollient
Propylene Glycol
Humectant
Aluminum Starch Octenylsuccinate
AbsorbentPEG-100 Stearate
Glyceryl Stearate
Emollient
Salicylic Acid
Masking
Cetyl Alcohol
Emollient
Acrylates/C10-30 Alkyl Acrylate Crosspolymer
Emulsion StabilisingSodium Hydroxide
BufferingCapryloyl Salicylic Acid
Exfoliating
Xanthan Gum
EmulsifyingZinc PCA
Humectant
Zingiber Officinale Root Extract
MaskingStearyl Alcohol
Emollient
Myristyl Alcohol
Emollient
Octadecenedioic Acid
Emulsifying
Citral
Perfuming
BHT
Antioxidant
Water, Aloe Barbadensis Leaf Juice, Di-C12-13 Alkyl Malate, Niacinamide, Cyclohexasiloxane, Propylene Glycol, Aluminum Starch Octenylsuccinate, PEG-100 Stearate, Glyceryl Stearate, Salicylic Acid, Cetyl Alcohol, Acrylates/C10-30 Alkyl Acrylate Crosspolymer, Sodium Hydroxide, Capryloyl Salicylic Acid, Xanthan Gum, Zinc PCA, Zingiber Officinale Root Extract, Stearyl Alcohol, Myristyl Alcohol, Octadecenedioic Acid, Citral, BHT
Ingredients Explained
These ingredients are found in both products.
Ingredients higher up in an ingredient list are typically present in a larger amount.
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. Stay hydrated!
Learn more about WaterNiacinamide has emerged as an all-star ingredient due to its many benefits.
It is known to treat acne by reducing inflammation. It also helps fade dark-spots and strengthen the skin by promoting the growth of the ceramide barrier.
Other benefits include smoothing wrinkles and minimizing redness.
The cherry on top? Niacinamide can also help build keratin, a protein that keeps skin firm.
When incorporating niacinamide into your routine, look out for concentration amounts. Typically, 5% niacinamide provides benefits such as fading dark spots. However, if you have sensitive skin, it is better to begin with a smaller concentration.
Niacinamide can be mixed with other ingredients to boost benefits. For instance, it has shown to be effective when used with copper, folic acid, and zinc to treat acne.
Learn more about NiacinamideZinc PCA (or "zinc salt") differs slightly from zinc itself. PCA stands for pyrrolidone carboxylic acid. However, Zinc PCA comes from zinc.
It can help reduce redness, regulate sebum, and promote the general healing process of the skin.
Zinc PCA tends to be especially useful for those with oily, acne-prone skin. It's certainly an ingredient worth trying out!
Learn more about Zinc PCASodium 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 HydroxideCapryloyl Salicylic Acid comes from salicylic acid, the famous acne-fighting BHA.
It usually goes by a more common name of LHA, or lipohydroxy acid.
Like salicylic acid, this ingredient is a chemical exfoliant that can help break down the oil in your pores and reduce inflammation.
Though studies for LHA do show it to be less effective than salicylic acid. To be fair, salicylic acid is the reigning monarch of acne treatments.
However, a study from 2009 found LHA to be comparable to BPO, making it a good alternative for people with sensitive skin. Another study of 14 patients found a significant decrease in comedones after using LHA.
Another pro of LHA? It is less irritating than salicylic acid due to its large molecule size.
Large molecules cannot penetrate skin as well, so they are gentler on the skin. LHA is much less penetrative than salicylic acid.
An in-vitro study (not done on a living organism) found only 6% of LHA penetrated past the statum corneum compared to 58% of salicylic acid. An in-vivo (done on a living organism) analysis revealed ~17% of LHA was still present in the top layer of skin after 4 days, versus ~9% of salicylic acid.
Interestingly, a study from 2008 found LHA comparable to another famous acid, glycolic acid.
This study found about 10% of LHA is as effective as 20-50% of glycolic acid in treating hyperpigmentation and fine-lines.
Hydroxy acids have been found to stimulate skin protein, lipids, and thermal thickening. This may have anti-aging benefits.
Learn more about Capryloyl Salicylic AcidXanthan gum is used as a stabilizer and thickener within cosmetic products. It helps give products a sticky, thick feeling - preventing them from being too runny.
On the technical side of things, xanthan gum is a polysaccharide - a combination consisting of multiple sugar molecules bonded together.
Xanthan gum is a pretty common and great ingredient. It is a natural, non-toxic, non-irritating ingredient that is also commonly used in food products.
Learn more about Xanthan GumSalicylic Acid (also known as beta hydroxy acid or BHA) is one of the most well-known ingredients for treating skin that struggles with blackheads and acne. It helps to exfoliate both the skin's surface and pores, and also acts as an anti-inflammatory agent.
This multitasking property makes it a great ingredient for cleaning out pores, controlling oil production, and reducing inflammation.
Unlike AHAs which are water soluble, Salicylic Acid is oil soluble. This means that it's able to exfoliate the inside of pores and reduce blackheads.
Concentrations of 0.5-2% are recognized by the U.S. FDA as an over-the-counter topical acne product.
It can cause irritation and/or dryness if one's skin already has a compromised moisture barrier, so it's best to focus on repairing that before introducing a Salicylic Acid into your routine.
In general, Salicylic Acid is a great ingredient for oily acne-prone skin.
While salicylic acid does not increase sun-sensitivity, we still recommend wearing SPF.
If you are looking for the ingredient called BHA or Butylated Hydroxyanisole, click here.
Learn more about Salicylic AcidIngredient Ratings
Here's what our community thinks of the ingredients in these products.
When to use
La Roche-Posay Effaclar Duo+M 35 ingredients
Kiehl's Breakout Control Blemish Treatment Facial Lotion 22 ingredients
Reviews
Here's what our community thinks
La Roche-Posay Effaclar Duo+M 35 ingredients
Doesn't do magic but definitely works well if you have some smaller pimples or you're dealing with some marks
Did a decent job of reducing irritation during A-B testing on half of my face as a spot treatment, but not as effective in speeding up the healing process. May clash with benzoyl peroxide treatments.
