Versus

Ouai Hair Oil Versus Olaplex No.4 Bond Maintenance Shampoo

Hair Oil
Shampoo
American Brand United States
American Brand United States

Overview

What they are

These products are both cruelty-free . They have a total of 7 ingredients in common

Cool Features

They both contain Vitamin E

Suited For

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

Free From

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

What's Inside

They both contain common allergens, fragrances, oils and silicones

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

Click any item below to learn more and see relevant ingredients

Ouai Hair Oil 45 ingredients

Olaplex No.4 Bond Maintenance Shampoo 62 ingredients

About this product

About this product

At a glance

Click on any of the items below to learn more

Ouai Hair Oil 45 ingredients

Olaplex No.4 Bond Maintenance Shampoo 62 ingredients

Key Ingredients

Benefits

Concerns

Key Ingredients

Benefits

Concerns

Ingredients Side-by-side

found in both products
Hair Oil

Cyclopentasiloxane

Emollient
Silicon Icon

Dimethicone

Emollient
1 / 0 Silicon Icon

Prunus Amygdalus Dulcis Oil

Skin Conditioning
3 / 0 Oil IconBad for Acne Prone Skin IconNot safe for Fungal Acne Icon

Isododecane

Emollient

Hydrogenated Ethylhexyl Olivate

Emollient
No.4 Bond Maintenance Shampoo

Water

Skin Conditioning

Sodium Lauroyl Methyl Isethionate

Cleansing

Cocamidopropyl Hydroxysultaine

Cleansing

Potassium Cocoyl Glycinate

Disodium Cocoyl Glutamate

Cleansing

Potassium Cocoate

Emulsifying
Can worsen Dry Skin Icon

Sodium Lauroyl Sarcosinate

Cleansing

Glycereth-26

Humectant
0 / 0

Decyl Glucoside

Cleansing

Parfum

Masking
Fragrance IconMay worsen Eczema IconMay worsen Rosacea Icon

Phenoxyethanol

Preservative
Preservative Icon

Cocamidopropylamine Oxide

Cleansing

Sodium Cocoyl Glutamate

Cleansing

Glycol Distearate

Emollient
Not safe for Fungal Acne Icon

Disodium Laureth Sulfosuccinate

Cleansing

Methyl Gluceth-20

Humectant

Acrylates Copolymer

PEG-120 Methyl Glucose Dioleate

Emulsifying
0 / 0 Not safe for Fungal Acne Icon

Amodimethicone

Silicon Icon

Polyquaternium-10

Citric Acid

Buffering
AHA IconGood for Oily Skin IconGood for Skin Texture IconGood for Minimizing Pores IconGood for Scar Healing IconHelps brighten skin IconMay worsen Rosacea Icon

Ethylhexylglycerin

Skin Conditioning

Sodium Lauryl Sulfoacetate

Cleansing

Divinyldimethicone/Dimethicone Copolymer

Chlorphenesin

Antimicrobial
Preservative Icon

Polyquaternium-11

Guar Hydroxypropyltrimonium Chloride

Skin Conditioning

C11-15 Pareth-7

Emulsifying

Trisodium Ethylenediamine Disuccinate

Laureth-9

Emulsifying

Glycerin

Humectant
0 / 0 Helps hydrate Dry Skin IconHelps brighten skin Icon

Trideceth-12

Emulsifying

Panthenol

Skin Conditioning
0 / 0 Helps hydrate Dry Skin IconHelps reduce Skin Redness IconHelps reduce irritation Icon

Hydrolyzed Vegetable Protein Pg-Propyl Silanetriol

Skin Conditioning

C12-13 Pareth-3

Emulsifying

C12-13 Pareth-23

Cleansing

Helianthus Annuus Seed Oil

Emollient
0 / 0 Oil IconHelps hydrate Dry Skin IconNot safe for Fungal Acne Icon

Tocopherol

Antioxidant
0-3 / 0-3 Vitamin E IconAntioxidant IconHelps hydrate Dry Skin IconHelps with Anti-Aging IconGood for Scar Healing Icon

Pseudozyma Epicola/Camellia Sinensis Seed Oil Ferment Extract Filtrate

Humectant
Oil IconNot safe for Fungal Acne Icon

Pseudozyma Epicola/Argania Spinosa Kernel Oil Ferment Filtrate

Skin Conditioning
Oil Icon

Prunus Armeniaca Kernel Oil

Masking
1-2 / 0 Oil IconNot safe for Fungal Acne Icon

Quaternium-95

UV Absorber

Propanediol

Solvent

Helianthus Annuus Seed Extract

Skin Conditioning

PEG-8

Humectant

Bis-Aminopropyl Diglycol Dimaleate

Skin Conditioning

Euterpe Oleracea Fruit Extract

Rosmarinus Officinalis Leaf Extract

Antimicrobial

Punica Granatum Extract

Astringent

Origanum Vulgare Leaf Extract

Skin Conditioning

Musa Sapientum Fruit Extract

Skin Conditioning

Morinda Citrifolia Fruit Extract

Skin Conditioning

Sodium Hyaluronate

Humectant
0 / 0 Hyaluronic Acid Icon

PEG-8/Smdi Copolymer

Arctium Lappa Root Extract

Skin Conditioning

Sodium Polyacrylate

Absorbent

Palmitoyl Myristyl Serinate

Skin Conditioning

Citral

Perfuming
Fragrance IconMay cause irritation IconEU Allergen IconMay worsen Rosacea Icon

Hexyl Cinnamal

Perfuming
Fragrance IconMay cause irritation IconEU Allergen Icon

Limonene

Perfuming
Fragrance IconMay worsen Eczema IconMay worsen Rosacea Icon

Biotin

Antiseborrhoeic

Pentaerythrityl Tetra-Di-T-Butyl Hydroxyhydrocinnamate

Antioxidant
Antioxidant Icon

Water, Sodium Lauroyl Methyl Isethionate, Cocamidopropyl Hydroxysultaine, Potassium Cocoyl Glycinate, Disodium Cocoyl Glutamate, Potassium Cocoate, Sodium Lauroyl Sarcosinate, Glycereth-26, Decyl Glucoside, Parfum, Phenoxyethanol, Cocamidopropylamine Oxide, Sodium Cocoyl Glutamate, Glycol Distearate, Disodium Laureth Sulfosuccinate, Methyl Gluceth-20, Acrylates Copolymer, PEG-120 Methyl Glucose Dioleate, Amodimethicone, Polyquaternium-10, Citric Acid, Ethylhexylglycerin, Sodium Lauryl Sulfoacetate, Divinyldimethicone/Dimethicone Copolymer, Chlorphenesin, Polyquaternium-11, Guar Hydroxypropyltrimonium Chloride, C11-15 Pareth-7, Trisodium Ethylenediamine Disuccinate, Laureth-9, Glycerin, Trideceth-12, Panthenol, Hydrolyzed Vegetable Protein Pg-Propyl Silanetriol, C12-13 Pareth-3, C12-13 Pareth-23, Helianthus Annuus Seed Oil, Tocopherol, Pseudozyma Epicola/Camellia Sinensis Seed Oil Ferment Extract Filtrate, Pseudozyma Epicola/Argania Spinosa Kernel Oil Ferment Filtrate, Prunus Armeniaca Kernel Oil, Quaternium-95, Propanediol, Helianthus Annuus Seed Extract, PEG-8, Bis-Aminopropyl Diglycol Dimaleate, Euterpe Oleracea Fruit Extract, Rosmarinus Officinalis Leaf Extract, Punica Granatum Extract, Origanum Vulgare Leaf Extract, Musa Sapientum Fruit Extract, Morinda Citrifolia Fruit Extract, Sodium Hyaluronate, PEG-8/Smdi Copolymer, Arctium Lappa Root Extract, Sodium Polyacrylate, Palmitoyl Myristyl Serinate, Citral, Hexyl Cinnamal, Limonene, Biotin, Pentaerythrityl Tetra-Di-T-Butyl Hydroxyhydrocinnamate

Ingredients Explained

These ingredients are found in both products.

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

Emollient, Masking, Skin Conditioning

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
Antimicrobial, Masking, Skin Conditioning

Rosmarinus Officinalis Leaf Extract comes from rosemary. Rosemary is native to the Mediterranean.

While Rosmarinus Officinalis Leaf Oil can be volatile due to its fragrant properties, the fragrance components are usually removed in the leaf extract.

Rosemary Leaf Extract can help protect your skin against damage from free-radical molecules. It contains many antioxidants such as rosmarinic acid and caffeic acid.

Rosemarinic acid has been found to help soothe skin conditions such as eczema and acne.

Learn more about Rosmarinus Officinalis Leaf Extract
Antioxidant, Masking, Skin Conditioning

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
Buffering, Masking

Citric 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 Acid
Preservative

Phenoxyethanol is a preservative that has germicide, antimicrobial, and aromatic properties. Studies show that phenoxyethanol can prevent 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.

Masking, Perfuming

Parfum 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 Parfum
Perfuming

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

When to use

Ouai Hair Oil 45 ingredients

Olaplex No.4 Bond Maintenance Shampoo 62 ingredients

27 Routines
37% use in am
63% use in pm
70% use every day
When to use See routines that use it ->
44 Routines
45% use in am
55% use in pm
64% use every day
When to use See routines that use it ->

Reviews

Here's what our community thinks

Ouai Hair Oil 45 ingredients

5.0 /5
from 1 rating
Curls (1) Frizz (1) Soft (1)
anemone's avatar

anemone

8 months ago
Review

this product has quite a few good quality oils in it, so i think you’re getting your money’s worth. it also has a clean, feminine floral scent. it really smooths down your hair, but it’s lightweight and, unless you use too much, your hair is unlikely to become greasy!

#frizz
#soft
#curls
#waves

Olaplex No.4 Bond Maintenance Shampoo 62 ingredients

2.4 /5
from 7 ratings
Color Care (2)
Butter's avatar

Butter

17 days ago
Review

⋆.ೃ࿔*:・ 🤎

⚠️ 𝐓𝐡𝐢𝐬 𝐩𝐫𝐨𝐝𝐮𝐜𝐭 𝐰𝐚𝐬 𝐦𝐢𝐧𝐢/𝐭𝐫𝐚𝐯𝐞𝐥 𝐬𝐢𝐳𝐞𝐝!!

🍄 𝐌𝐲 𝐡𝐚𝐢𝐫 𝐭𝐲𝐩𝐞: 𝐖𝐚𝐯𝐲 (𝐭𝐲𝐩𝐞 𝟐𝐚), 𝐦𝐞𝐝𝐢𝐮𝐦 𝐝𝐞𝐧𝐬𝐢𝐭𝐲, 𝐦𝐞𝐝𝐢𝐮𝐦 𝐭𝐡𝐢𝐜𝐤𝐧𝐞𝐬𝐬, 𝐥𝐨𝐰 𝐩𝐨𝐫𝐨𝐬𝐢𝐭𝐲. 𝐀𝐭 𝐭𝐡𝐞 𝐭𝐢𝐦𝐞 𝐨𝐟 𝐮𝐬𝐢𝐧𝐠 𝐭𝐡𝐢𝐬 𝐩𝐫𝐨𝐝𝐮𝐜𝐭 𝐈 𝐡𝐚𝐝 𝐝𝐲𝐞𝐝 𝐦𝐲 𝐡𝐚𝐢𝐫 𝐝𝐚𝐫𝐤 𝐛𝐫𝐨𝐰𝐧 𝐰𝐢𝐭𝐡 𝐚 𝐬𝐞𝐦𝐢-𝐩𝐞𝐫𝐦𝐚𝐧𝐞𝐧𝐭 𝐡𝐚𝐢𝐫 𝐝𝐲𝐞. 𝐌𝐲 𝐡𝐚𝐢𝐫 𝐰𝐚𝐬 𝐚 𝐛𝐢𝐭 𝐝𝐚𝐦𝐚𝐠𝐞𝐝 𝐚𝐧𝐝 𝐭𝐚𝐧𝐠𝐥𝐞𝐝 𝐞𝐚𝐬𝐢𝐥𝐲.

🪴 𝐏𝐫𝐨𝐬:

·˚ ༘₊· ͟͟͞͞꒰➳ 𝐋𝐞𝐟𝐭 𝐦𝐲 𝐡𝐚𝐢𝐫 𝐯𝐞𝐫𝐲 𝐜𝐥𝐞𝐚𝐧 (𝐦𝐚𝐲𝐛𝐞 𝐭𝐨𝐨 𝐜𝐥𝐞𝐚𝐧 𝐥𝐨𝐥).
ೃ⁀➷ 𝐃𝐢𝐝𝐧'𝐭 𝐬𝐞𝐞𝐦 𝐭𝐨 𝐬𝐭𝐫𝐢𝐩 𝐦𝐲 𝐡𝐚𝐢𝐫 𝐝𝐲𝐞 𝐭𝐨𝐨 Show more

#color care
BubbIes's avatar

BubbIes

1 year ago
Review

You honestly shouldn’t be using this unless you have color treated hair, which is something I realized after using this for awhile. This is very heavy, I found that it weighed my hair down and made it look lifeless.

#color care