Updated on March 30, 2024
Overview
What they are
These products are both reef safe shampoos. They have a total of 8 ingredients in common
Suited For
They're both likely to be good for brightening skin
Free From
They both do not contain any parabens
What's Inside
They both contain harsh alcohols, common allergens and fragrances
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
Kérastase Densifique Thickening Shampoo for Thinning Hair 32 ingredients
Ouai Fine Hair Shampoo 36 ingredients
At a glance
Click on any of the items below to learn more
Kérastase Densifique Thickening Shampoo for Thinning Hair 32 ingredients
Ouai Fine Hair Shampoo 36 ingredients
Notable Ingredients
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Benefits
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Concerns
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Concerns
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Ingredients Side-by-side
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.
Can worsen Dry Skin
Sodium Laureth Sulfate (SLES) is a foaming, cleansing, and emulsifying ingredient. It is created from palm kernel oil or coconut oil. SLES is not the same as sodium lauryl sulfate. It is much milder and less likely to irritate.
Disodium Cocoamphodiacetate is a surfactant and helps cleanse skin. It is created from the fatty acids of coconut oil.
Glycol Distearate serves as a pearlizing or opacifying agent in cosmetic products.
Hexylene Glycol is a surfactant. Glycols are a class of alcohols. Hexylene Glycol is a surfactant and emulsifier.
3 Concerns
Sodium Lauryl Sulfate (SLS) is a sulfate with surfactant properties.
Chances are, you eat sodium chloride every day. Sodium Chloride is also known as table salt.
2 Concerns
Parfum is a catch-all term for an ingredient or more that is used to give a scent to products.
Sodium Benzoate is a preservative. It's used in both cosmetic and food products to inhibit the growth of mold and bacteria. It is typically produced synthetically.
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.
4 Benefits 2 Concerns
Citric Acid is an AHA derived from citrus fruits (think oranges, lemons, and limes!).
Coco-Betaine is the natural version of Cocamidopropyl Betaine. It is often derived from coconuts.
We don't have a description for Hydroxypropyl Guar Hydroxypropyltrimonium Chloride.
5 Concerns
Alcohol Denat. is an alcohol with a denaturant property. It is created by mixing ethanol with other additives.
Preservative 5 Benefits 4 Concerns
Salicylic 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.
Carbomer is a polymer of acrylic acid. Its main role is to create gel consistency within products.
EU Allergen
Hexyl Cinnamal is a fragrance ingredient with a similar scent to jasmine. It can be naturally found in chamomile essential oil.
Arginine is an amino acid that is important for human development. Your body uses is it to produce hair keratin and skin collagen.
Glutamic Acid is an amino acid that is found in all living organisms. Our bodies use this to help nerve cells in the brain communicate with other cells.
2 Concerns
Linalool is a fragrance and helps add scent to products. It's derived from common plants such as cinnamon, mint, citrus, and lavender.
EU Allergen
Citronellol is used to add fragrance/parfum to a product. It is often derived from plants such as roses. In fact, it can be found in many essential oils including geranium, lavender, neroli, and more. The scent of Citronellol is often described as "fresh, grassy, and citrus-like".
Serine is an amino acid naturally found in our body. Our bodies use amino acids to create protein.
EU Allergen
Alpha-Isomethyl Ionone is a fragrance. It can be synthetically created or naturally occurring.
We don't have a description for Hydroxypropyltrimonium Hydrolyzed Wheat Protein.
Sodium Hyaluronate is hyaluronic acid's salt form. It is commonly derived from the sodium salt of hyaluronic acid.
EU Allergen
Geraniol is used to add fragrance/parfum to a product. It is the main component of citronellol. It is a monoterpenoid and an alcohol.
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.
Antioxidant 4 Benefits May cause irritation
Tocopherol (also known as Vitamin E) is a common antioxidant used to help protect the skin from free-radicals and strengthen the skin barrier. It's also fat soluble - this means our skin is great at absorbing it.
Sodium Citrate is the sodium salts of citric acid. In skincare, it is used to alter pH levels and acts as a preservative.
Water, Sodium Laureth Sulfate, Disodium Cocoamphodiacetate, Glycol Distearate, Hexylene Glycol, Sodium Lauryl Sulfate, Sodium Chloride, Parfum, Sodium Benzoate, Sodium Hydroxide, Citric Acid, Coco-Betaine, Hydroxypropyl Guar Hydroxypropyltrimonium Chloride, Alcohol Denat., Polyquaternium-30, Salicylic Acid, Carbomer, Hexyl Cinnamal, Arginine, Glutamic Acid, Linalool, Citronellol, Serine, Alpha-Isomethyl Ionone, Hydroxypropyltrimonium Hydrolyzed Wheat Protein, Sodium Hyaluronate, 2-Oleamido-1,3-Octadecanediol, Safflower Glucoside, Geraniol, Phenoxyethanol, Tocopherol, Sodium Citrate
Rosa Damascena Flower Water comes from the Damask rose. It is a dilluted version of the Rose Essential oil.
Sodium C14-16 Olefin Sulfonate is a cleansing agent made from a mixture of long chain sulfonate salts. It can also help produce foam.
Cocamidopropyl Betaine is a fatty acid created by mixing similar compounds in coconut oil and dimethylaminopropylamine. Dimethylaminopropylamine is a diamine, an amine with two amino groups.
This gentle cleansing and foaming ingredient is known for leaving a smooth feeling in skin and hair. It is made using coconut oil.
Peg-200 Hydrogenated Glyceryl Palmate isn't fungal acne safe.
2 Concerns
Parfum is a catch-all term for an ingredient or more that is used to give a scent to products.
Panthenol is a common ingredient that helps hydrate and soothe the skin. It can be found naturally in our skin and hair.
We don't have a description for Cocoglucosides Hydroxypropyltrimonium Chloride.
Hydrolyzed Keratin is derived from keratin. Keratin is a large protein that is naturally found in our hair and skin.
Biotin is a B vitamin that is naturally produced by our bodies. It is also called Vitamin H.
Not safe for Fungal Acne
Salvia Hispanica Seed Oil is an oil and isn't fungal acne safe.
This ingredient is a preservative, antimicrobial, and emulsifier. It is often used in cosmetics for its ability to cleanse, condition, and reduce static.
We don't have a description for Hydroxypropyl Guar Hydroxypropyltrimonium Chloride.
Glycerin is already naturally found in your skin. It helps moisturize and protect your skin.
Peg-150 Distearate is an emulsifier and thickening agent. It is created from stearic acid.
Peg-7 Glyceryl Cocoate is created from polyethylene glycol and fatty acids from coconut oil.
Chances are, you eat sodium chloride every day. Sodium Chloride is also known as table salt.
Polyquaternium-7 is a light to clear colored liquid. It is commonly found in haircare products for its film-forming and anti-static properties.
Disodium EDTA plays a role in making products more stable by aiding other preservatives.
4 Benefits 2 Concerns
Citric Acid is an AHA derived from citrus fruits (think oranges, lemons, and limes!).
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.
Tetrasodium EDTA is the salt formed from neutralizing ethylenediamine tetraacetic acid with sodium hydroxide. It is a chelating agent and used to prevent metal ions from binding to other ingredients. This helps keep the product and ingredients stable.
Potassium Sorbate is a preservative used to prevent yeast and mold in products. It is commonly found in both cosmetic and food products.
Sodium Benzoate is a preservative. It's used in both cosmetic and food products to inhibit the growth of mold and bacteria. It is typically produced synthetically.
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.
Fragrance Preservative 6 Concerns
Benzyl Alcohol is most commonly used as a preservative. It also has a subtle, sweet smell. Small amounts of Benzyl Alcohol is not irritating and safe to use in skincare products. Most Benzyl Alcohol is derived from fruits such as apricots.
Acetic Acid is created during the process of fermenting ethanol. It is used to help adjust the pH of cosmetics.
EU Allergen
Benzyl Salicylate is a solvent and fragrance additive. It is an ester of benzyl alcohol and salicylic acid. This ingredient can be naturally found in some plants and plant extracts.
Limonene is a fragrance that adds scent and taste to a formulation.
EU Allergen
Hexyl Cinnamal is a fragrance ingredient with a similar scent to jasmine. It can be naturally found in chamomile essential oil.
Rosa Damascena Flower Water, Sodium C14-16 Olefin Sulfonate, Cocamidopropyl Betaine, Sodium Methyl Cocoyl Taurate, Peg-200 Hydrogenated Glyceryl Palmate, Cocamide Mipa, Parfum, Panthenol, Cocoglucosides Hydroxypropyltrimonium Chloride, Hydrolyzed Keratin, Biotin, Salvia Hispanica Seed Oil, Cetrimonium Chloride, Hydroxypropyl Guar Hydroxypropyltrimonium Chloride, Glycerin, Sodium Lauroyl Glycinate, Peg-150 Distearate, Propoxytetramethyl Piperidinyl Dimethicone, Trideceth-6, C11-15 Pareth-7, Peg-7 Glyceryl Cocoate, Sodium Chloride, Polyquaternium-7, Disodium EDTA, Citric Acid, Sodium Hydroxide, Tetrasodium EDTA, Potassium Sorbate, Sodium Benzoate, Phenoxyethanol, Benzyl Alcohol, Acetic Acid, Sodium Acetate, Benzyl Salicylate, Limonene, Hexyl Cinnamal
Ingredients Explained
These ingredients are found in both products.
Ingredients higher up in an ingredient list are typically present in a larger amount.
Chances are, you eat sodium chloride every day. Sodium Chloride is also known as table salt.
This ingredient has many purposes in skincare: thickener, emulsifier, and exfoliator.
You'll most likely find this ingredient in cleansers where it is used to create a gel-like texture. As an emulsifier, it also prevents ingredients from separating.
There is much debate on whether this ingredient is comedogenic. The short answer - comedogenic ratings don't tell the whole story. Learn more about comegodenic ratings here.
The concensus about this ingredient causing acne seems to be divided. Research is needed to understand if this ingredient does cause acne.
Scrubs may use salt as the primary exfoliating ingredient.
Learn more about Sodium ChlorideParfum 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.
In the US, the alternative name for parfum is 'fragrance'.
The term '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 Benzoate is a preservative. It's used in both cosmetic and food products to inhibit the growth of mold and bacteria. It is typically produced synthetically.
Both the US FDA and EU Health Committee have approved the use of sodium benzoate. In the US, levels of 0.1% (of the total product) are allowed.
Sodium benzoate works as a preservative by inhibiting the growth of bacteria inside of cells. It prevents the cell from fermenting a type of sugar using an enzyme called phosphofructokinase.
Sodium Benzoate is the salt of benzoic acid. Foods containing sodium benzoate include soda, salad dressings, condiments, fruit juices, wines, and snack foods.
Studies for using ascorbic acid and sodium benzoate in cosmetics are lacking, especially in skincare routines with multiple steps.
We always recommend speaking with a professional, such as a dermatologist, if you have any concerns.
Learn more about Sodium BenzoateSodium 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 HydroxideCitric Acid is an AHA derived from citrus fruits (think oranges, lemons, and limes!).
As an AHA, Citric Acid removes the top layer of skin cells from the newer layer of skin underneath. This helps skin to remove dark spots and even out skin tone.
If you spot Citric Acid near the end of an ingredient list, it's likely there as a pH adjuster rather than an active ingredient.
Read more about some other popular AHA's here:
Learn more about Citric AcidWe don't have a description for Hydroxypropyl Guar Hydroxypropyltrimonium Chloride.
Hexyl Cinnamal is a fragrance ingredient with a similar scent to jasmine. It can be naturally found in chamomile essential oil.
This ingredient is a known EU allergen and may sensitize the skin. The EU requires this ingredient to be listed separately on an ingredients list.
Hexyl Cinnamal is not water soluble but is soluble in oils.
Learn more about Hexyl CinnamalPhenoxyethanol 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.
Ingredient Ratings
Here's what our community thinks of the ingredients in these two products.
When to use
Kérastase Densifique Thickening Shampoo for Thinning Hair 32 ingredients
Ouai Fine Hair Shampoo 36 ingredients
Reviews
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