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Product Comparison

Here's our complete breakdown comparing the ingredients, attributes, and more of Olaplex No.7 Bonding Oil versus Olaplex Nº.9 Bond Protector Nourishing Hair Serum .

Published on July 03, 2023

Overview

What they are

These products are both vegan and cruelty-free . They have a total of 9 ingredients in common

Suited For

They're both likely to be good for dry skin

Free From

They both do not contain any harsh alcohols, parabens or sulfates

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 need an update? Let us know.

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

Hair Oil

Oil-based hair treatment to help nourish the hair.

Hair Serum

Liquid-based hair treatment to help nourish the hair.

Price

Shop

Buy No.7 Bonding Oil

Starts at $30.00
Shop

Buy Nº.9 Bond Protector Nourishing Hair Serum

Starts at $27.15

Ingredient Info

Click any item below to learn more and view relevant 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
fungal-acne safe
reef-safe
eu-allergen-free
vegan
cruelty-free

At a glance

Click on any of the items below to learn more

Notable Ingredients

Vitamin E

Benefits

Hydrating (2)
Anti-Aging
Scar Healing
Brightening

Concerns

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

Benefits

Hydrating
Redness Reducing
Reduces Irritation (2)

Concerns

Rosacea
Eczema (2)
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Ingredients Side-by-side

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

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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: Skin Conditioning

We don't have a description for Bis-Aminopropyl Diglycol Dimaleate.

Olaplex No.7 Bonding Oil contains this as ingredient number 6.

Olaplex Nº.9 Bond Protector Nourishing Hair Serum contains this as ingredient number 6.

2
What it does: Solvent
Community Rating: Liked

Propanediol helps absorb ingredients into your skin, boosting their benefits. It can act as an emollient, making your skin softer. Propanediol can help products last longer by boosting the properties of preservatives within the formulation.

Propanediol is not likely to cause sensitivity and considered safe to use.

It is derived from corn or petroleum with a clear color and no scent.

Learn more about Propanediol

Olaplex No.7 Bonding Oil contains this as ingredient number 7.

Olaplex Nº.9 Bond Protector Nourishing Hair Serum contains this as ingredient number 2.

3
What it does: Skin Conditioning, Solvent
Community Rating: Loved

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 Water

Olaplex No.7 Bonding Oil contains this as ingredient number 13.

Olaplex Nº.9 Bond Protector Nourishing Hair Serum contains this as ingredient number 1.

4
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

Olaplex No.7 Bonding Oil contains this as ingredient number 15.

Olaplex Nº.9 Bond Protector Nourishing Hair Serum contains this as ingredient number 25.

5
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

Olaplex No.7 Bonding Oil contains this as ingredient number 16.

Olaplex Nº.9 Bond Protector Nourishing Hair Serum contains this as ingredient number 28.

6
What it does: Perfuming, Solvent
Community Rating: Very Disliked

Limonene 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 Limonene

Olaplex No.7 Bonding Oil contains this as ingredient number 19.

Olaplex Nº.9 Bond Protector Nourishing Hair Serum contains this as ingredient number 29.

7
What it does: Perfuming

Citral is a fragrance and used to add a lemon-like scent to products. It is both naturally found in plants and created synthetically. In plants, it is commonly occurring in lemon myrtle, lemongrass, lemon tea-tree, lemon verbena, and other citruses.

The EU mandates Citral be listed separately as a fragrance. It is a known allergen and may cause contact dermatitis. Citral can also used as a masking ingredient.

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.

The term 'citral' is a collective term for two geometric isomers: geranial/Citral A and neral/Citral B.

Learn more about Citral

Olaplex No.7 Bonding Oil contains this as ingredient number 21.

Olaplex Nº.9 Bond Protector Nourishing Hair Serum contains this as ingredient number 26.

8
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

Olaplex No.7 Bonding Oil contains this as ingredient number 22.

Olaplex Nº.9 Bond Protector Nourishing Hair Serum contains this as ingredient number 30.

9
What it does: Perfuming
Community Rating: Very Disliked

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".

Since the Citronellol molecule is already unstable, Citronellol becomes irritating on the skin when exposed to air.

Citronellol is a modified terpene. Terpenes are unsaturated hydrocarbons found in plants. They make up the primary part of essential oils.

Citronellol is not able to be absorbed into deeper layers of the skin. It has low permeability,

Citronellol is also a natural insect repellent.

Learn more about Citronellol

Olaplex No.7 Bonding Oil contains this as ingredient number 24.

Olaplex Nº.9 Bond Protector Nourishing Hair Serum contains this as ingredient number 27.

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

20% are loved or liked
12% have mixed ratings
48% are disliked or very disliked
20% have no rating yet
37% are loved or liked
7% have mixed ratings
33% are disliked or very disliked
23% have no rating yet

Usage

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

When to use

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Reviews

Here's what our community thinks

Olaplex No.7 Bonding Oil 25 ingredients

5.0 /5
from 3 reviews

Olaplex Nº.9 Bond Protector Nourishing Hair Serum 30 ingredients

3.0 /5
from 3 reviews

Alternatives

Our Dupe Finder has found 2 potential alternatives that have similar ingredients to Olaplex No.7 Bonding Oil.

See 2 alternatives

Our Dupe Finder has found 2 potential alternatives that have similar ingredients to Olaplex Nº.9 Bond Protector Nourishing Hair Serum.

See 2 alternatives
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