Here's our complete breakdown comparing the ingredients, attributes, and more of La Roche-Posay Effaclar Ultra Concentrated Serum versus Kiehl's Ultra Pure High-Potency 9.8% Glycolic Acid Serum .
Last updated on July 18, 2023. Published on May 28, 2023
Overview
What they are
These products are both reef safe . They have a total of 4 ingredients in common
Cool Features
They both contain AHA
Suited For
They're both likely to be good for anti aging, brightening skin, oily skin, reducing pores, scar healing, dark spots and better texture
Free From
They both do not contain any common allergens, parabens, silicones or sulfates
What's Inside
They both contain harsh alcohols
We independently verify ingredients, and our claims are backed by peer-reviewed research. Spot a product that need an update? Let us know.
Serum
Serums are highly concentrated with ingredients to provide skin with benefits. They should be used after cleansing and before moisturizing.
Exfoliator
Exfoliators are used to exfoliate the skin, or remove dead skin cells from the skin. Exfoliators may be chemical or physical.
Price
Ingredient Info
La Roche-Posay Effaclar Ultra Concentrated Serum 19 ingredients
Kiehl's Ultra Pure High-Potency 9.8% Glycolic Acid Serum 7 ingredients
Contains Alcohol
Ingredients in this product that are types of alcohol:
Silicon Free
This product is free of silicons 🎉
Contains Fragrance
Ingredients in this product that are forms of fragrance:
Sulfate Free
This product is free of sulfates 🎉
Paraben Free
This product is free of parabens 🎉
Contains Oils
Ingredients in this product that are types of oil:
Not Malassezia Safe
Ingredients in this product that are not malassezia safe:
Reef Safe
This product is free of ingredients that damage reefs 🎉
EU Allergen Free
This product is free of EU allergens 🎉
Non Vegan
This product is not vegan 😥
Not Cruelty Free
This product is not cruelty-free 😥
Contains Alcohol
Ingredients in this product that are types of alcohol:
Silicon Free
This product is free of silicons 🎉
Fragrance Free
This product is free of fragrances 🎉
Sulfate Free
This product is free of sulfates 🎉
Paraben Free
This product is free of parabens 🎉
Oil Free
This product is free of oils 🎉
Malassezia Safe
This product is free of malassezia feeding ingredients 🎉
Reef Safe
This product is free of ingredients that damage reefs 🎉
EU Allergen Free
This product is free of EU allergens 🎉
Non Vegan
This product is not vegan 😥
Not Cruelty Free
This product is not cruelty-free 😥
At a glance
Click on any of the items below to learn more
La Roche-Posay Effaclar Ultra Concentrated Serum 19 ingredients
Kiehl's Ultra Pure High-Potency 9.8% Glycolic Acid Serum 7 ingredients
Notable Ingredients
This product contains 2 ingredients that may have this attribute:
This product contains 1 ingredient that may have this attribute:
This product contains 1 ingredient that may have this attribute:
Benefits
This product contains 3 ingredients that may have this attribute:
This product contains 1 ingredient that may have this attribute:
This product contains 1 ingredient that may have this attribute:
This product contains 3 ingredients that may have this attribute:
This product contains 1 ingredient that may have this attribute:
This product contains 2 ingredients that may have this attribute:
This product contains 2 ingredients that may have this attribute:
This product contains 2 ingredients that may have this attribute:
This product contains 4 ingredients that may have this attribute:
Concerns
This product contains 3 ingredients that may have this attribute:
This product contains 1 ingredient that may have this attribute:
This product contains 3 ingredients that may have this attribute:
This product contains 5 ingredients that may have this attribute:
This product contains 3 ingredients that may have this attribute:
Notable Ingredients
This product contains 1 ingredient that may have this attribute:
This product contains 1 ingredient that may have this attribute:
Benefits
This product contains 1 ingredient that may have this attribute:
This product contains 1 ingredient that may have this attribute:
This product contains 1 ingredient that may have this attribute:
This product contains 1 ingredient that may have this attribute:
This product contains 1 ingredient that may have this attribute:
This product contains 1 ingredient that may have this attribute:
This product contains 1 ingredient that may have this attribute:
This product contains 2 ingredients that may have this attribute:
Concerns
This product contains 1 ingredient that may have this attribute:
This product contains 1 ingredient that may have this attribute:
This product contains 2 ingredients that may have this attribute:
This product contains 2 ingredients that may have this attribute:
This product contains 1 ingredient that may have this attribute:
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Join SkinSortIngredients Compared
Ingredients that are highlighted in purple are present in both products.
La Roche-Posay Effaclar Ultra Concentrated Serum 19 ingredients
Kiehl's Ultra Pure High-Potency 9.8% Glycolic Acid Serum 7 ingredients
Water • Alcohol Denat. • Propanediol • Glycolic Acid • Niacinamide • Dimethyl Isosorbide • Pentylene Glycol • Salicylic Acid • Sodium Hydroxide • Peg-60 Hydrogenated Castor Oil • Hydroxyethylpiperazine Ethane Sulfonic Acid • Citric Acid • Peg-30 Glyceryl Cocoate • Capryloyl Salicylic Acid • Biosaccharide Gum-1 • Maltodextrin • Phytic Acid • Polyquaternium-10 • Parfum
Ingredients Side-by-side
Ingredients that are highlighted in purple are present in both products.
Learn more about what what Com. / Irr. ratings are
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. Talk about multi-purpose! If you see this, drink a glass of water. Stay hydrated!
Learn more about WaterLa Roche-Posay Effaclar Ultra Concentrated Serum contains this as ingredient number 1.
Kiehl's Ultra Pure High-Potency 9.8% Glycolic Acid Serum contains this as ingredient number 1.
Alcohol Denat. is an alcohol with a denaturant property. It is created by mixing ethanol and other additives. It has a low molecular weight and will evaporate quickly. This helps other ingredients become better absorbed and dry once applied.
Alcohol Denat. is volatile and may cause irritation. It helps draw out natural oils in skin and dry out your skin.
One study from 2005 found adding emollients to propanol-based sanitizer decreased irritation.
Alcohol is antibacterial by nature. This can help preserve products and increase their shelf life.
Other types of astringent alcohols include:
Learn more about Alcohol Denat.La Roche-Posay Effaclar Ultra Concentrated Serum contains this as ingredient number 2.
Kiehl's Ultra Pure High-Potency 9.8% Glycolic Acid Serum contains this as ingredient number 4.
Glycolic Acid is arguably the most famous AHA with research to back up its benefits. Its main role is to peel the top layer of skin cells from the newer layer of skin underneath. This helps skin to remove dark spots and look more even.
Glycolic Acid has shown to boost collage production, a protein that helps skin stay firm. Overall, Glycolic Acid helps with improving uneven tone, rough patches of skin, fine lines, wrinkles, and sun damage. It also increases skin hydration by playing a role in creating molecules that create hyaluronic acid naturally.
When applying Glycolic Acid, it is normal to feel slight stinging. The pH value and concentration of glycolic acid play a role in the effectiveness of the product.
Recent studies have shown Glycolic Acid may protect the skin against UV damage. However, you should always wear SPF, especially when using exfoliants.
Read more about some other popular AHA's here:
Learn more about Glycolic AcidLa Roche-Posay Effaclar Ultra Concentrated Serum contains this as ingredient number 4.
Kiehl's Ultra Pure High-Potency 9.8% Glycolic Acid Serum contains this as ingredient number 2.
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.
Learn more about Sodium HydroxideLa Roche-Posay Effaclar Ultra Concentrated Serum contains this as ingredient number 9.
Kiehl's Ultra Pure High-Potency 9.8% Glycolic Acid Serum contains this as ingredient number 5.
Here's what our community thinks of the ingredients in these two products.
La Roche-Posay Effaclar Ultra Concentrated Serum 19 ingredients
Kiehl's Ultra Pure High-Potency 9.8% Glycolic Acid Serum 7 ingredients
Usage
Here's some more info on how this product is used by our community.
When to use
La Roche-Posay Effaclar Ultra Concentrated Serum 19 ingredients
Kiehl's Ultra Pure High-Potency 9.8% Glycolic Acid Serum 7 ingredients
Reviews
Here's what our community thinks
La Roche-Posay Effaclar Ultra Concentrated Serum 19 ingredients
Worth the try for ACNE skin
I used it for about 2 years and I was more than satisfied. Upon returning on my Erasmus trip, it broke me out and made my skin dry. I don't know if anything happened during the trip but right now I don't use...
Worth the try for ACNE skin
I used it for about 2 years and I was more than satisfied. Upon returning on my Erasmus trip, it broke me out and made my skin dry. I don't know if anything happened during the trip but right now I don't use it. It's really good if you have taken acne treatment pills and you need smt to keep the acne away (from my experience at least).
Dependable anti-blemish and anti-marks serum for sensitive skin
This is a very good and gentle exfoliating serum for sensitive skin. It helped me get rid of some hormonal acne few years ago, cleared my skin and somehow made it more...
Dependable anti-blemish and anti-marks serum for sensitive skin
This is a very good and gentle exfoliating serum for sensitive skin. It helped me get rid of some hormonal acne few years ago, cleared my skin and somehow made it more resistant to acids, which I had to be very carful with before. Its also good for treating backne.
Cleared my skin like no other product
Cleared my skin like no other product
Kiehl's Ultra Pure High-Potency 9.8% Glycolic Acid Serum 7 ingredients
Alternatives
Our Dupe Finder has found 46 potential alternatives that have similar ingredients to La Roche-Posay Effaclar Ultra Concentrated Serum.
See 46 alternativesOur Dupe Finder has found 50 potential alternatives that have similar ingredients to Kiehl's Ultra Pure High-Potency 9.8% Glycolic Acid Serum.
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