Updated on April 21, 2025
Overview
What they are
These products are both serums. They have a total of 4 ingredients in common
Suited For
They're both likely to be good for fighting acne, anti aging, dry skin, brightening skin, oily skin, reducing pores and scar healing
Free From
They both do not contain any harsh alcohols, common allergens, oils, parabens or sulfates
What's Inside
They both contain fragrances
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Ingredient Info
Ducray Keracnyl Serum 22 ingredients
Bioderma Sébium Serum 17 ingredients
What's inside (and what isn't)
What's inside (and what isn't)
At a glance
Click on any of the items below to learn more
Ducray Keracnyl Serum 22 ingredients
Bioderma Sébium Serum 17 ingredients
Key Ingredients
Benefits
Concerns
Key Ingredients
Benefits
Concerns
Ingredients Side-by-side
Water
Skin ConditioningCaprylic/Capric Triglyceride
Masking
Azelaic Acid
Buffering
Dicaprylyl Ether
Emollient
Glycolic Acid
Buffering
Glycerin
Humectant
Nylon-12
Glyceryl Stearate
Emollient
Cetearyl Alcohol
Emollient
Sodium Hydroxide
BufferingDimethicone
Emollient
Acetic Acid
BufferingCeteareth-33
CleansingDisodium EDTA
Parfum
Masking
Glyceryl Laurate
Emollient
Myrtus Communis Leaf Extract
Perfuming
Niacinamide
Smoothing
Sclerotium Gum
Emulsion StabilisingSodium Chloride
Masking
Tocopherol
Antioxidant
Tocopheryl Acetate
Antioxidant
Water, Caprylic/Capric Triglyceride, Azelaic Acid, Dicaprylyl Ether, Glycolic Acid, Glycerin, Nylon-12, Glyceryl Stearate, Cetearyl Alcohol, Sodium Hydroxide, Dimethicone, Acetic Acid, Ceteareth-33, Disodium EDTA, Parfum, Glyceryl Laurate, Myrtus Communis Leaf Extract, Niacinamide, Sclerotium Gum, Sodium Chloride, Tocopherol, Tocopheryl Acetate
Water
Skin ConditioningButylene Glycol
Humectant
Glycerin
Humectant
Propanediol
Solvent
Acetyl Glucosamine
Skin ConditioningPentylene Glycol
Skin ConditioningSalicylic Acid
Masking
Xanthan Gum
EmulsifyingPolysorbate 20
Emulsifying
Sodium Citrate
BufferingHydrolyzed Hyaluronic Acid
Humectant
Mannitol
Humectant
Sodium Hydroxide
BufferingPropyl Gallate
Antioxidant
Sodium Metabisulfite
Antioxidant
Parfum
Masking
Aminoethanesulfinic Acid
Antioxidant
Ingredients Explained
These ingredients are found in both products.
Ingredients higher up in an ingredient list are typically present in a larger amount.
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 GlycerinParfum is a catch-all term for an ingredient or more that is used to give a scent to products.
Also called "fragrance", this ingredient can be a blend of hundreds of chemicals or plant oils. This means every product with "fragrance" or "parfum" in the ingredients list is a different mixture.
For instance, Habanolide is a proprietary trade name for a specific aroma chemical. When used as a fragrance ingredient in cosmetics, most aroma chemicals fall under the broad labeling category of “FRAGRANCE” or “PARFUM” according to EU and US regulations.
The term 'parfum' or 'fragrance' is not regulated in many countries. In many cases, it is up to the brand to define this term.
For instance, many brands choose to label themselves as "fragrance-free" because they are not using synthetic fragrances. However, their products may still contain ingredients such as essential oils that are considered a fragrance by INCI standards.
One example is Calendula flower extract. Calendula is an essential oil that still imparts a scent or 'fragrance'.
Depending on the blend, the ingredients in the mixture can cause allergies and sensitivities on the skin. Some ingredients that are known EU allergens include linalool and citronellol.
Parfum can also be used to mask or cover an unpleasant scent.
The bottom line is: not all fragrances/parfum/ingredients are created equally. If you are worried about fragrances, we recommend taking a closer look at an ingredient. And of course, we always recommend speaking with a professional.
Learn more about ParfumSodium 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. Stay hydrated!
Learn more about WaterIngredient Ratings
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