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Product Comparison

Here's our complete breakdown comparing the ingredients, attributes, and more of K18 Hair Molecular Repair Hair Oil versus Ouai Hair Oil .

Published on December 16, 2023

Overview

What they are

These products are both cruelty-free hair oils. They have a total of 5 ingredients in common

Cool Features

They both contain Vitamin E

Suited For

They're both likely to be good for anti aging, dry skin, brightening skin and scar healing

Free From

They both do not contain any parabens or sulfates

What's Inside

They both contain common allergens, fragrances and oils

We independently verify ingredients, and our claims are backed by peer-reviewed research. Spot a product that need an update? Let us know.

Hair Oil American Brand United States
Hair Oil American Brand United States

Hair Oil

Oil-based hair treatment to help nourish the hair.

Hair Oil

Oil-based hair treatment to help nourish the hair.

Price

Shop

Buy Molecular Repair Hair Oil

Shop

Buy Hair Oil

Starts at $30.00

Ingredient Info

Click any item below to learn more and view relevant ingredients.

K18 Hair Molecular Repair Hair Oil 17 ingredients

Ouai Hair Oil 45 ingredients

alcohol-free
silicon-free
fragrance-free
sulfate-free
paraben-free
oil-free
fungal-acne safe
reef-safe
eu-allergen-free
vegan
cruelty-free
alcohol-free
silicon-free
fragrance-free
sulfate-free
paraben-free
oil-free
reef-safe
eu-allergen-free
vegan
cruelty-free

At a glance

Click on any of the items below to learn more

K18 Hair Molecular Repair Hair Oil 17 ingredients

Ouai Hair Oil 45 ingredients

Notable Ingredients

Vitamin E
Peptides

Benefits

Hydrating (4)
Anti-Aging
Scar Healing
Brightening

Concerns

Drying
May Worsen Oily Skin (2)
Irritating (3)
Rosacea (2)
Eczema (2)

Notable Ingredients

Vitamin E

Benefits

Hydrating (4)
Reduces Irritation
Anti-Aging
Scar Healing
Brightening

Concerns

May Worsen Oily Skin (2)
Irritating (2)
Rosacea
Eczema (2)
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Ingredients Compared

Ingredients that are highlighted in purple are present in both products.

K18 Hair Molecular Repair Hair Oil 17 ingredients

Ouai Hair Oil 45 ingredients

Ingredients Side-by-side

Ingredients that are highlighted in purple are present in both products.

Learn more about what what Com. / Irr. ratings are

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Ingredients Explained

These ingredients are found in both products.

Ingredients higher up in an ingredient list are typically present in a larger amount.

1
What it does: Emollient, Masking, Skin Conditioning
Community Rating: Disliked

Helianthus Annuus Seed Oil is the oil derived from the seeds of a Sunflower. Sunflower seed oil is non-fragrant. It is an emollient, meaning it helps to soften the skin.

Sunflower seed oil contains many fatty acids. The fatty acids found in sunflower seeds include (from highest amount to least): linoleic acid, myristic acid, palmitic acid, stearic acid, arachidic acid, oleic acid, and linolenic acid.

These fatty acids help the skin create ceramides. Ceramides play a role in repairing the skin barrier.

Helianthus Annuus Seed Oil helps moisturize the skin. This in turn helps the skin look more rejuvenated and smoother.

Sunflowers are rich in vitamin E.

Historians believe Indigenous cultures of North America domesticated sunflowers before corn. Thus they relied on sunflower oil for a variety of uses. One such use is moisturizing skin and hair.

Sunflower seed oil may not be fungal acne safe. We recommend speaking with a professional if you have any concerns.

Learn more about Helianthus Annuus Seed Oil

K18 Hair Molecular Repair Hair Oil contains this as ingredient number 4.

Ouai Hair Oil contains this as ingredient number 12.

2
What it does: Masking, Perfuming
Community Rating: Very Disliked

Parfum is a catch-all term for an ingredient or more that is used to give aroma to products. Parfum, or fragrance, 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. One example is Calendula flower extract. Essential oil ingredients still impart a scent or 'fragrance'.

Depending on the blend, it can cause allergies and sensitivities on the skin. Some ingredients that are known EU allergens include linalool and citronellol.

Products use parfum often to give products a scent or cover up smells of different ingredients.

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 Parfum

K18 Hair Molecular Repair Hair Oil contains this as ingredient number 12.

Ouai Hair Oil contains this as ingredient number 38.

3
What it does: Antioxidant, Masking, Skin Conditioning
Community Rating: Liked

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.

Vitamin E also helps keep your natural skin lipids healthy. Your lipid skin barrier naturally consists of lipids, ceramides, and fatty acids. Vitamin E offers extra protection for your skin’s lipid barrier, keeping your skin healthy and nourished.

Another benefit is a bit of UV protection. Vitamin E helps reduce the damage caused by UVB rays. (It should not replace your sunscreen). Combining it with Vitamin C can decrease sunburned cells and hyperpigmentation after UV exposure.

You might have noticed Vitamin E + C often paired together. This is because it is great at stabilizing Vitamin C. Using the two together helps increase the effectiveness of both ingredients.

There are often claims that Vitamin E can reduce/prevent scarring, but these claims haven't been confirmed by scientific research.

Learn more about Tocopherol

K18 Hair Molecular Repair Hair Oil contains this as ingredient number 13.

Ouai Hair Oil contains this as ingredient number 27.

4
What it does: Perfuming
Community Rating: Very Disliked

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 Cinnamal

K18 Hair Molecular Repair Hair Oil contains this as ingredient number 15.

Ouai Hair Oil contains this as ingredient number 44.

5
What it does: Perfuming
Community Rating: Very Disliked

Linalool is a fragrance and helps add scent to products. It's derived from common plants such as cinnamon, mint, citrus, and lavender.

Linalool has the same effect as Limonene when exposed to air. Oxidized linalool can cause allergies and skin sensitivity.

Linalool has a scent that is floral, spicy tropical, and citrus-like.

Learn more about Linalool

K18 Hair Molecular Repair Hair Oil contains this as ingredient number 17.

Ouai Hair Oil contains this as ingredient number 42.

Here's what our community thinks of the ingredients in these two products.

K18 Hair Molecular Repair Hair Oil 17 ingredients

Ouai Hair Oil 45 ingredients

18% are loved or liked
0% have mixed ratings
41% are disliked or very disliked
41% have no rating yet
20% are loved or liked
13% have mixed ratings
62% are disliked or very disliked
4% have no rating yet

Usage

Here's some more info on how this product is used by our community.

When to use

K18 Hair Molecular Repair Hair Oil 17 ingredients

Ouai Hair Oil 45 ingredients

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Alternatives

Our Dupe Finder has found 7 potential alternatives that have similar ingredients to K18 Hair Molecular Repair Hair Oil.

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Our Dupe Finder has found 3 potential alternatives that have similar ingredients to Ouai Hair Oil.

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