Here's our complete breakdown comparing the ingredients, attributes, and more of Paula's Choice 1% Retinol Treatment US versus Kiehl's Micro-Dose Anti-Aging Retinol Serum with Ceramides and Peptide .
Last updated on March 20, 2024. Published on March 17, 2022
Overview
What they are
These products are both reef safe . They have a total of 16 ingredients in common
Cool Features
They both contain ceramides, hyaluronic acid, peptides, retinoid and Vitamin E
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, dark spots and better texture
Free From
They both do not contain any harsh alcohols, common allergens, parabens or sulfates
What's Inside
They both contain oils
We independently verify ingredients, and our claims are backed by peer-reviewed research. Spot a product that need an update? Let us know.
Facial Treatment
Facial treatments are specially designed to treat a skin concern. Acne treatments and anti-aging products are common examples of facial treatments.
Serum
Serums are highly concentrated with ingredients to provide skin with benefits. They should be used after cleansing and before moisturizing.
Price
Ingredient Info
Paula's Choice 1% Retinol Treatment 53 ingredients
Kiehl's Micro-Dose Anti-Aging Retinol Serum with Ceramides and Peptide 43 ingredients
Alcohol Free
This product is free of harsh alcohols 🎉
Contains Silicon
Ingredients in this product that are types of silicon:
Fragrance Free
This product is free of fragrances 🎉
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 🎉
Vegan
This product is vegan 🎉
Cruelty Free
This product is cruelty-free 🎉
Alcohol Free
This product is free of harsh alcohols 🎉
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 😥
At a glance
Click on any of the items below to learn more
Paula's Choice 1% Retinol Treatment 53 ingredients
Kiehl's Micro-Dose Anti-Aging Retinol Serum with Ceramides and Peptide 43 ingredients
Notable Ingredients
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Benefits
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Concerns
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Notable Ingredients
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Benefits
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Concerns
This product contains 2 ingredients that may have this attribute:
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Join SkinSortIngredients Compared
Ingredients that are highlighted in purple are present in both products.
Paula's Choice 1% Retinol Treatment 53 ingredients
Kiehl's Micro-Dose Anti-Aging Retinol Serum with Ceramides and Peptide 43 ingredients
Water • Dimethicone • Glycerin • Butylene Glycol • Isononyl Isononanoate • Castor Isostearate Succinate • Glyceryl Stearate • C12-15 Alkyl Benzoate • Dimethicone Crosspolymer • Peg-33 • Polysorbate 20 • Behenyl Alcohol • Peg-100 Stearate • Pentaerythrityl Tetraisostearate • Polymethylsilsesquioxane • Tetrahexyldecyl Ascorbate • Retinol • Ceramide Ng • Palmitoyl Tetrapeptide-7 • Palmitoyl Hexapeptide-12 • Sodium Hyaluronate • Dipotassium Glycyrrhizate • Glycyrrhiza Glabra Root Extract • Avena Sativa Kernel Extract • Arctium Lappa Seed Oil • Salix Alba Extract • Glycine Soja Sterols • Lecithin • Allantoin • Tocopheryl Acetate • Hydrolyzed Soy Protein • Sorbitan Laurate • Acetyl Dipeptide-1 Cetyl Ester • Disodium EDTA • Hydroxyethylcellulose • Palmitoyl Tripeptide-1 • Sodium Hydroxide • Tribehenin • Caprylyl Glycol • Ethylhexylglycerin • Pentylene Glycol • Peg-75 Shea Butter Glycerides • Ppg-12/Smdi Copolymer • Peg-10 Phytosterol • Peg-8 Dimethicone • Peg-14 • Magnesium Aluminum Silicate • Arachidyl Glucoside • Arachidyl Alcohol • Sclerotium Gum • Carbomer • Phenoxyethanol • Benzoic Acid
Water • Glycerin • Butylene Glycol • Pentylene Glycol • Niacinamide • Cetyl Alcohol • Isohexadecane • Isononyl Isononanoate • Diisopropyl Sebacate • 2-Oleamido-1,3-Octadecanediol • 4-T-Butylcyclohexanol • Acetyl Dipeptide-1 Cetyl Ester • Adenosine • Ceramide NP • Hydroxypalmitoyl Sphinganine • Lauroyl Lysine • Octyldodecanol • Pentaerythrityl Tetra-Di-T-Butyl Hydroxyhydrocinnamate • Sodium Chloride • Sodium Hyaluronate • Sodium Hydroxide • Trisodium Ethylenediamine Disuccinate • Retinol • Tocopherol • Dicaprylyl Ether • Ammonium Polyacryloyldimethyl Taurate • Behenyl Alcohol • Caprylyl Glycol • Carbomer • Cetearyl Alcohol • Cetearyl Glucoside • Glycine Soja Oil • Helianthus Annuus Seed Oil • Hydroxyethylcellulose • Lecithin • Phenethyl Alcohol • Poloxamer 188 • Polycaprolactone • Sorbitan Laurate • Steareth-100 • CI 40800 • Chlorphenesin • Phenoxyethanol
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 WaterPaula's Choice 1% Retinol Treatment US contains this as ingredient number 1.
Kiehl's Micro-Dose Anti-Aging Retinol Serum with Ceramides and Peptide contains this as ingredient number 1.
Glycerin is already naturally found in your skin. It helps moisturize and protect your skin.
A study from 2016 found glycerin to be more effective as a humectant than AHAs and hyaluronic acid.
As a humectant, it helps the skin stay hydrated by pulling moisture to your skin. The low molecular weight of glycerin allows it to pull moisture into the deeper layers of your skin.
Hydrated skin improves your skin barrier; Your skin barrier helps protect against irritants and bacteria.
Glycerin has also been found to have antimicrobial and antiviral properties. Due to these properties, glycerin is often used in wound and burn treatments.
In cosmetics, glycerin is usually derived from plants such as soybean or palm. However, it can also be sourced from animals, such as tallow or animal fat.
This ingredient is organic, colorless, odorless, and non-toxic.
Glycerin is the name for this ingredient in American English. British English uses Glycerol/Glycerine.
Learn more about GlycerinPaula's Choice 1% Retinol Treatment US contains this as ingredient number 3.
Kiehl's Micro-Dose Anti-Aging Retinol Serum with Ceramides and Peptide contains this as ingredient number 2.
Butylene Glycol (or BG) is used within cosmetic products for a few different reasons:
- It is a solvent, meaning that it helps to dissolve other ingredients. This also enhances the absorption of the product into one's skin.
- It is a humectant, which means that it helps attract moisture into the skin.
- It helps improve product application.
Overall, Butylene Glycol is a safe and well-rounded ingredient. It is unlikely to irritate skin, and works well with pretty much all other ingredients.
Paula's Choice 1% Retinol Treatment US contains this as ingredient number 4.
Kiehl's Micro-Dose Anti-Aging Retinol Serum with Ceramides and Peptide contains this as ingredient number 3.
Isononyl Isononanoate is a synthetic skin-conditioner and texture enhancer. It is created from nonanoic acid, a fatty acid found in cocoa and lavender oil.
As an emollient, Isononyl Isononanoate helps keep your skin soft and smooth. This is because emollients create a barrier on the skin to trap moisture in.
Isononyl Isononanoate helps give products a velvet feel and improves spreadability.
Learn more about Isononyl IsononanoatePaula's Choice 1% Retinol Treatment US contains this as ingredient number 5.
Kiehl's Micro-Dose Anti-Aging Retinol Serum with Ceramides and Peptide contains this as ingredient number 8.
A type of fatty alcohol. Fatty Alcohols are most often used as an emollient or to thicken a product. They are usually derived from natural fats and oils and therefore do not have the same drying or irritating effect as traditional alcohols.
Emollients help keep your skin soft and hydrated by creating a film that traps moisture in.
Behenyl Alcohol is usually derived from the fats in vegetable oils.
In 2000, Behenyl Alcohol was approved by the US as medicine to reduce the duration of cold sores.
Learn more about Behenyl AlcoholPaula's Choice 1% Retinol Treatment US contains this as ingredient number 12.
Kiehl's Micro-Dose Anti-Aging Retinol Serum with Ceramides and Peptide contains this as ingredient number 27.
Retinol is a form of Vitamin A and proven to help with anti-aging.
It promotes collagen production, increases new cell turnoever, and protects your skin as an antioxidant.
Retinol boosts collagen production and increases cell turnover. This makes retinol effective in removing wrinkles, fading dark spots, and reducing the appearance of pores.
Retinol is less effective when exposed to sun. Be sure to look for appropriate packaging to keep your retinol potent.
Using retinol and retinoids will increase sun-sensitivity in the first few weeks of use. Though studies show retinoids increase your skin's natural SPF with continuous use, it is best to always wear sunscreen and sun-protection.
We recommend speaking with a medical professional about using this ingredient during pregnancy.
Retinol may cause irritation in some people, so be sure to patch test. Experts recommend 'ramping up' retinol use: start using this ingredient once a week and work up to using it daily.
Read about Tretinoin
Learn more about RetinolPaula's Choice 1% Retinol Treatment US contains this as ingredient number 17.
Kiehl's Micro-Dose Anti-Aging Retinol Serum with Ceramides and Peptide contains this as ingredient number 23.
Sodium Hyaluronate is hyaluronic acid's salt form. It is commonly derived from the sodium salt of hyaluronic acid.
Like hyaluronic acid, it is great at holding water and acts as a humectant. This makes it a great skin hydrating ingredient.
Sodium Hyaluronate is naturally occurring in our bodies and is mostly found in eye fluid and joints.
These are some other common types of Hyaluronic Acid:
Learn more about Sodium HyaluronatePaula's Choice 1% Retinol Treatment US contains this as ingredient number 21.
Kiehl's Micro-Dose Anti-Aging Retinol Serum with Ceramides and Peptide contains this as ingredient number 20.
Lecithin is a term for a group of substances found in plants, animals, and humans. They are made up of mixture of fatty acids. These fatty acids usually are a mixture of phosphoric acid's choline ester connected to stearic, oleic, and palmitic acids. Most lecithins are created from plant ingredients scuh as sunflower.
Lecithin is an emollient. Emollients help soften the skin and creates a barrier to keep moisture in.
As an emulsifier, it also helps prevent water and oil ingredients from separating. Lecithin can help ingredients be better absorbed by the skin. The phospholipids in Lecithin can produce liposomes. Liposomes help other ingredients get through the skin barrier.
Learn more about LecithinPaula's Choice 1% Retinol Treatment US contains this as ingredient number 28.
Kiehl's Micro-Dose Anti-Aging Retinol Serum with Ceramides and Peptide contains this as ingredient number 35.
Sorbitan Laurate is created from lauric acid and derivatives from sorbitol. It is an emulsifier.
Paula's Choice 1% Retinol Treatment US contains this as ingredient number 32.
Kiehl's Micro-Dose Anti-Aging Retinol Serum with Ceramides and Peptide contains this as ingredient number 39.
Acetyl Dipeptide-1 Cetyl Ester is a peptide.
Paula's Choice 1% Retinol Treatment US contains this as ingredient number 33.
Kiehl's Micro-Dose Anti-Aging Retinol Serum with Ceramides and Peptide contains this as ingredient number 12.
Hydroxyethylcellulose is used to improve the texture of products. It is created from a chemical reaction involving ethylene oxide and alkali-cellulose. Cellulose is a sugar found in plant cell walls and help give plants structure.
Hydroxyethylcellulose helps stabilize products by preventing ingredients from separating. It can also help thicken the texture of a product.
This ingredient can also be found in pill medicines to help our bodies digest other ingredients.
Learn more about HydroxyethylcellulosePaula's Choice 1% Retinol Treatment US contains this as ingredient number 35.
Kiehl's Micro-Dose Anti-Aging Retinol Serum with Ceramides and Peptide contains this as ingredient number 34.
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 HydroxidePaula's Choice 1% Retinol Treatment US contains this as ingredient number 37.
Kiehl's Micro-Dose Anti-Aging Retinol Serum with Ceramides and Peptide contains this as ingredient number 21.
Caprylyl Glycol is a humectant and emollient, meaning it attracts and preserves moisture.
It is a common ingredient in many products, especially those designed to hydrate skin. The primary benefits are retaining moisture, skin softening, and promoting a healthy skin barrier.
Though Caprylyl Glycol is an alcohol derived from fatty acids, it is not the kind that can dry out skin.
This ingredient is also used as a preservative to extend the life of products. It has slight antimicrobial properties.
Learn more about Caprylyl GlycolPaula's Choice 1% Retinol Treatment US contains this as ingredient number 39.
Kiehl's Micro-Dose Anti-Aging Retinol Serum with Ceramides and Peptide contains this as ingredient number 28.
Pentylene glycol is typically used within a product to thicken it. It also adds a smooth, soft, and moisturizing feel to the product. It is naturally found in plants such as sugar beets.
The hydrophilic trait of Pentylene Glycol makes it a humectant. As a humectant, Pentylene Glycol helps draw moisture from the air to your skin. This can help keep your skin hydrated.
This property also makes Pentylene Glycol a great texture enhancer. It can help thicken or emulsify a product. Emulsifiers help stabilize a product. It does this by preventing certain ingredients from separating.
Pentylene Glycol also acts as a mild preservative and helps to keep a product microbe-free.
Some people may experience mild eye and skin irritation from Pentylene Glycol. We always recommend speaking with a professional about using this ingredient in your routine.
Pentylene Glycol has a low molecular weight and is part of the 1,2-glycol family.
Learn more about Pentylene GlycolPaula's Choice 1% Retinol Treatment US contains this as ingredient number 41.
Kiehl's Micro-Dose Anti-Aging Retinol Serum with Ceramides and Peptide contains this as ingredient number 4.
Carbomer is a polymer of acrylic acid. Its main role is to create gel consistency within products.
Carbomer is commonly found in many types of cosmetics products. It is found to be safe in concentrations up to 15%. However, a high amount of carbomer can cause pilling or balling up of products. Most products contain 1% of less of carbomer.
Paula's Choice 1% Retinol Treatment US contains this as ingredient number 51.
Kiehl's Micro-Dose Anti-Aging Retinol Serum with Ceramides and Peptide contains this as ingredient number 29.
Phenoxyethanol is a preservative that has germicide, antimicrobial, and aromatic properties. Studies show that phenoxyethanol can prevent germ and microbial growth. By itself, it has a scent that is similar to that of a rose.
It's often used in formulations along with Caprylyl Glycol to preserve the shelf life of products.
Paula's Choice 1% Retinol Treatment US contains this as ingredient number 52.
Kiehl's Micro-Dose Anti-Aging Retinol Serum with Ceramides and Peptide contains this as ingredient number 43.
Here's what our community thinks of the ingredients in these two products.
Paula's Choice 1% Retinol Treatment 53 ingredients
Kiehl's Micro-Dose Anti-Aging Retinol Serum with Ceramides and Peptide 43 ingredients
Usage
Here's some more info on how this product is used by our community.
When to use
Paula's Choice 1% Retinol Treatment 53 ingredients
Kiehl's Micro-Dose Anti-Aging Retinol Serum with Ceramides and Peptide 43 ingredients
Reviews
Here's what our community thinks
Paula's Choice 1% Retinol Treatment 53 ingredients
Love it
My favorite retinol. Been using it for a year and never had any bad reactions (be sure to follow instructions like starting slow). It's a bit pricey but worth it
Love it
My favorite retinol. Been using it for a year and never had any bad reactions (be sure to follow instructions like starting slow). It's a bit pricey but worth it
Kiehl's Micro-Dose Anti-Aging Retinol Serum with Ceramides and Peptide 43 ingredients
Great retinol for beginners
This is a product with a low dose of retinol, which makes the product suited to apply in the eye area as well. A lot of my earlier products containing retinol were serums, while this is more of a cream. It...
Great retinol for beginners
This is a product with a low dose of retinol, which makes the product suited to apply in the eye area as well. A lot of my earlier products containing retinol were serums, while this is more of a cream. It makes it more hydrating, but without an additional moisturiser it is still drying me out.
Although the percentage of retinol is low, your skin has to adjust to the retinol, using it every other day. Combining it with a moisturiser and a good hydration serum in the morning makes this a great product for your skin.
I highly recommend combining this with Missha Time Revolution Night Repair. It did wonders for my skin!
Alternatives
Our Dupe Finder has found 4 potential alternatives that have similar ingredients to Paula's Choice 1% Retinol Treatment US.
See 4 alternativesOur Dupe Finder has found 19 potential alternatives that have similar ingredients to Kiehl's Micro-Dose Anti-Aging Retinol Serum with Ceramides and Peptide.
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