Ouai Hydrating Scalp Serum for Healthy, Fuller Looking Hair Versus Living Proof Scalp Care Density Serum
Updated on August 20, 2024
Overview
What they are
These products are both vegan, cruelty-free, and reef safe . They have a total of 7 ingredients in common
Suited For
They're both likely to be good for anti aging, dry skin, brightening skin, reducing pores and scar healing
Free From
They both do not contain any harsh alcohols, oils, parabens or silicones
What's Inside
They both contain 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
Ouai Hydrating Scalp Serum for Healthy, Fuller Looking Hair 28 ingredients
Living Proof Scalp Care Density Serum 29 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
Ouai Hydrating Scalp Serum for Healthy, Fuller Looking Hair 28 ingredients
Living Proof Scalp Care Density Serum 29 ingredients
Key Ingredients
Benefits
Concerns
Benefits
Concerns
Ingredients Side-by-side
Water
Skin ConditioningPolysorbate 20
Emulsifying
Butylene Glycol
Humectant
Glycerin
Humectant
Polyquaternium-7
Rhodiola Rosea Extract
EmollientSodium Hyaluronate
Humectant
Tocopheryl Acetate
Antioxidant
Acetyl Tetrapeptide-3
Skin Protecting
Tocopherol
Antioxidant
Rosa Centifolia Flower Extract
AstringentDextran
Trifolium Pratense Flower Extract
Astringent
Acanthopanax Senticosus Root Extract
Skin ConditioningRhaponticum Carthamoides Root Extract
Skin ConditioningInonotus Obliquus Extract
Skin ConditioningSelaginella Lepidophylla Extract
EmollientEthylhexylglycerin
Skin ConditioningDisodium EDTA
Sodium Hydroxide
BufferingAcrylates/C10-30 Alkyl Acrylate Crosspolymer
Emulsion StabilisingCitric Acid
Buffering
Sodium Benzoate
Masking
Phenoxyethanol
Preservative
Parfum
Masking
Eugenol
Perfuming
Limonene
Perfuming
Linalool
Perfuming
Water, Polysorbate 20, Butylene Glycol, Glycerin, Polyquaternium-7, Rhodiola Rosea Extract, Sodium Hyaluronate, Tocopheryl Acetate, Acetyl Tetrapeptide-3, Tocopherol, Rosa Centifolia Flower Extract, Dextran, Trifolium Pratense Flower Extract, Acanthopanax Senticosus Root Extract, Rhaponticum Carthamoides Root Extract, Inonotus Obliquus Extract, Selaginella Lepidophylla Extract, Ethylhexylglycerin, Disodium EDTA, Sodium Hydroxide, Acrylates/C10-30 Alkyl Acrylate Crosspolymer, Citric Acid, Sodium Benzoate, Phenoxyethanol, Parfum, Eugenol, Limonene, Linalool
Water
Skin ConditioningGlycerin
Humectant
Polysorbate 20
Emulsifying
Glycyrrhiza Glabra Root Extract
Bleaching
Saccharomyces Ferment Lysate Filtrate
Skin ConditioningGlycine
Buffering
Pisum Sativum Extract
Skin ConditioningPullulan
Zinc Sulfate
Antimicrobial
Quercus Robur Bark Extract
AstringentLarix Europaea Wood Extract
HumectantZinc Gluconate
Skin Conditioning
Acetyl Tyrosine
Skin ConditioningAmaranthus Caudatus Seed Extract
Skin Conditioning
Urtica Dioica Leaf Extract
Skin ConditioningHydrolyzed Yeast Protein
Skin ConditioningCamellia Sinensis Leaf Extract
Antimicrobial
Vitis Vinifera Seed Extract
Antimicrobial
Zinc Chloride
SoothingHydroxyethylcellulose
Emulsion StabilisingLysolecithin
EmulsifyingXanthan Gum
EmulsifyingSclerotium Gum
Emulsion StabilisingParfum
Masking
Sodium Hydroxide
BufferingPentylene Glycol
Skin ConditioningHydroxyacetophenone
Antioxidant
Limonene
Perfuming
Linalool
Perfuming
Water, Glycerin, Polysorbate 20, Glycyrrhiza Glabra Root Extract, Saccharomyces Ferment Lysate Filtrate, Glycine, Pisum Sativum Extract, Pullulan, Zinc Sulfate, Quercus Robur Bark Extract, Larix Europaea Wood Extract, Zinc Gluconate, Acetyl Tyrosine, Amaranthus Caudatus Seed Extract, Urtica Dioica Leaf Extract, Hydrolyzed Yeast Protein, Camellia Sinensis Leaf Extract, Vitis Vinifera Seed Extract, Zinc Chloride, Hydroxyethylcellulose, Lysolecithin, Xanthan Gum, Sclerotium Gum, Parfum, Sodium Hydroxide, Pentylene Glycol, Hydroxyacetophenone, Limonene, Linalool
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 GlycerinLimonene is a fragrance that adds scent and taste to a formulation.
It's found in the peel oil of citrus fruits and other plants such as lavender and eucalyptus. The scent of limonene is generally described as "sweet citrus".
Limonene acts as an antioxidant, meaning it helps neutralize free radicals.
When exposed to air, oxidized limonene may sensitize the skin. Because of this, limonene is often avoided by people with sensitive skin.
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.
Learn more about LimoneneLinalool is a fragrance and helps add scent to products. It's derived from common plants such as cinnamon, mint, citrus, and lavender.
Like Limonene, this ingredient oxidizes when exposed to air. Oxidized linalool can cause allergies and skin sensitivity.
This ingredient has a scent that is floral, spicy tropical, and citrus-like.
Learn more about LinaloolParfum 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 ParfumPolysorbate 20 is made by combining ethoxylation of sorbitan, ethylene oxide, and lauric acid. It is a mild cleansing agent, surfactant, and emulsifier.
As a surfactant, it helps collect dirt and oils for washing. Emulsifiers prevent oils and water from separating.
Polysorbate 20 also adds scent to a product. Since it is made using sorbitol, it has a sweet scent. Sorbitol can also be found in fruits such as apples and peaches.
The lauric acid used to create Polysorbate 20 is often derived from coconuts.
Polysorbate 20 may not be fungal acne safe.
Learn more about Polysorbate 20Sodium 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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