Explore Routine Login

Product Comparison

Here's our complete breakdown comparing the ingredients, attributes, and more of Monday Haircare Volume Shampoo versus Ouai Medium Hair Shampoo .

Published on April 09, 2023

Overview

What they are

These products are both cruelty-free and reef safe shampoos. They have a total of 15 ingredients in common

Cool Features

They both contain Vitamin E

Suited For

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

Free From

They both do not contain any parabens

What's Inside

They both contain harsh alcohols, 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.

Shampoo New Zealander Brand New Zealand
Shampoo American Brand United States

Shampoo

Detergent or soap for cleansing the hair.

Shampoo

Detergent or soap for cleansing the hair.

Price

Shop

Buy Volume Shampoo

Starts at $6.97
Shop

Buy Medium Hair Shampoo

Starts at $32.00

Ingredient Info

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

Monday Haircare Volume Shampoo 32 ingredients

Ouai Medium Hair Shampoo 40 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

Monday Haircare Volume Shampoo 32 ingredients

Ouai Medium Hair Shampoo 40 ingredients

Notable Ingredients

AHA
Vitamin E

Benefits

Hydrating
Skin Texture
Reduces Large Pores
Scar Healing
Brightening (3)

Concerns

Drying (3)
May Worsen Oily Skin
Acne Trigger (2)
Irritating (3)
Rosacea (4)
Eczema (3)

Notable Ingredients

Vitamin E

Benefits

Hydrating (2)
Reduces Irritation
Anti-Aging
Scar Healing
Brightening (2)

Concerns

Drying (3)
May Worsen Oily Skin
Acne Trigger (2)
Irritating (3)
Rosacea (3)
Eczema (3)
Join our community

Build your routine, track which ingredients work for you, and much more with your free account.

Join SkinSort

Ingredients Compared

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

Monday Haircare Volume Shampoo 32 ingredients

Ouai Medium Hair Shampoo 40 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

Loading ingredients...

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, 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

Monday Haircare Volume Shampoo contains this as ingredient number 1.

Ouai Medium Hair Shampoo contains this as ingredient number 1.

2
What it does: Cleansing, Foaming
Community Rating: Very Disliked

Sodium C14-16 Olefin Sulfonate is a cleansing agent made from a mixture of long chain sulfonate salts. It can also help produce foam.

This ingredient may be drying. We recommend speaking with a professional if you have concerns.

Monday Haircare Volume Shampoo contains this as ingredient number 3.

Ouai Medium Hair Shampoo contains this as ingredient number 2.

3
What it does: Cleansing
Community Rating: Disliked

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.

Cocamidopropyl Betaine is a surfactant and cleanser. It helps gather the dirt, pollutants, and other impurities in your skin to be washed away. It also helps thicken a product and make the texture more creamy.

Being created from coconut oil means Cocamidopropyl Betaine is hydrating for the skin.

While Cocamidopropyl Betaine was believed to be an allergen, a study from 2012 disproved this. It found two compounds in unpure Cocamidopropyl Betaine to be the irritants: aminoamide and 3-dimethylaminopropylamine. High-grade and pure Cocamidopropyl Betaine did not induce allergic reactions during this study.

Learn more about Cocamidopropyl Betaine

Monday Haircare Volume Shampoo contains this as ingredient number 6.

Ouai Medium Hair Shampoo contains this as ingredient number 3.

4
What it does: Humectant, Skin Conditioning, Skin Protecting, Solvent
Community Rating: Loved

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 Glycerin

Monday Haircare Volume Shampoo contains this as ingredient number 7.

Ouai Medium Hair Shampoo contains this as ingredient number 10.

5
What it does: Emulsifying
Community Rating: Very Disliked

Peg-7 Glyceryl Cocoate is created from polyethylene glycol and fatty acids from coconut oil.

It is a synthetic polymer with emulsifying and cleansing properties.

As an emulsifier, Peg-7 Glyceryl Cocoate prevents ingredients such as oils and water from separating. It also helps rinse away oils, dirt, and pollutants from skin.

Peg-7 Glyceryl Cocoate may not be fungal acne safe. It can also dry out skin.

Learn more about Peg-7 Glyceryl Cocoate

Monday Haircare Volume Shampoo contains this as ingredient number 8.

Ouai Medium Hair Shampoo contains this as ingredient number 27.

6
What it does: Masking, Perfuming, Skin Conditioning
Community Rating: Very Disliked

Cocos Nucifera Oil is obtained from the kernels of the coconut fruit. In other words, this is coconut oil.

Coconut Oil is rich in fatty acids with lauric acid making up the majority of these. It also contains linoleic acid. Due to this high fatty acid content, coconut oil helps trap moisture and soften skin.

Despite being antibacterial, coconut oil may not be great for acne-prone skin. It is comedogenic and may clog pores. This ingredient may not be safe for malassezia or fungal acne.

Coconut Oil should not replace your sunscreen for UV protection. Studies show it only blocks about 20% of UV.

This oil is non-volatile and has a light scent.

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 Cocos Nucifera Oil

Monday Haircare Volume Shampoo contains this as ingredient number 9.

Ouai Medium Hair Shampoo contains this as ingredient number 16.

7
What it does: Buffering, Masking
Community Rating: Disliked

Citric Acid is an AHA derived from citrus fruits (think oranges, lemons, and limes!).

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.

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 look more even.

Read more about some other popular AHA's here:

Learn more about Citric Acid

Monday Haircare Volume Shampoo contains this as ingredient number 12.

Ouai Medium Hair Shampoo contains this as ingredient number 29.

8
What it does:

Polyquaternium-7 is a light to clear colored liquid. It is commonly found in haircare products for its film-forming and anti-static properties.

According to a manufacturer, it is a non-paraben and specially developed for negatively charged surfactant systems. This makes it a great hairstyle holder and helps to improve wet hair detangling without adding buildup.

Monday Haircare Volume Shampoo contains this as ingredient number 15.

Ouai Medium Hair Shampoo contains this as ingredient number 14.

9
What it does: Masking, Preservative
Community Rating: Disliked

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.

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 Benzoate

Monday Haircare Volume Shampoo contains this as ingredient number 16.

Ouai Medium Hair Shampoo contains this as ingredient number 34.

10
What it does: Masking
Community Rating: Very Disliked

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 Chloride

Monday Haircare Volume Shampoo contains this as ingredient number 17.

Ouai Medium Hair Shampoo contains this as ingredient number 30.

11
What it does: Preservative
Community Rating: Very Disliked

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.

It's often used in formulations along with Caprylyl Glycol to preserve the shelf life of products.

Monday Haircare Volume Shampoo contains this as ingredient number 21.

Ouai Medium Hair Shampoo contains this as ingredient number 33.

12
What it does: Perfuming, Preservative, Solvent
Community Rating: Very Disliked

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.

Benzyl Alcohol has both antibacterial and antioxidant properties. These properties help lengthen the shelf life of products. Benzyl Alcohol is a solvent and helps dissolve other ingredients. It can also improve the texture and spreadability.

Alcohol comes in many different forms. Different types of alcohol will have different effects on skin. This ingredient is an astringent alcohol.

Using high concentrations of these alcohols are drying on the skin. They may strip away your skin's natural oils and even damage your skin barrier. Astringent alcohols may also irritate skin.

Other types of astringent alcohols include:

According to the National Rosacea Society based in the US, you should be mindful of products with these alcohols in the top half of ingredients.

Any type of sanitizing product will have high amounts of alcohol to help kill bacteria and viruses.

Learn more about Benzyl Alcohol

Monday Haircare Volume Shampoo contains this as ingredient number 22.

Ouai Medium Hair Shampoo contains this as ingredient number 36.

13
What it does:
Community Rating: Disliked

Disodium EDTA plays a role in making products more stable by aiding other preservatives.

It is a chelating agent, meaning it neutralizes metal ions that may be found in a product.

Disodium EDTA is a salt of edetic acid and is found to be safe in cosmetic ingredients.

Learn more about Disodium EDTA

Monday Haircare Volume Shampoo contains this as ingredient number 25.

Ouai Medium Hair Shampoo contains this as ingredient number 28.

14
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

Monday Haircare Volume Shampoo contains this as ingredient number 27.

Ouai Medium Hair Shampoo contains this as ingredient number 39.

15
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

Monday Haircare Volume Shampoo contains this as ingredient number 32.

Ouai Medium Hair Shampoo contains this as ingredient number 7.

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

Monday Haircare Volume Shampoo 32 ingredients

Ouai Medium Hair Shampoo 40 ingredients

16% are loved or liked
9% have mixed ratings
63% are disliked or very disliked
13% have no rating yet
15% are loved or liked
5% have mixed ratings
53% are disliked or very disliked
28% have no rating yet

Usage

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

When to use

Monday Haircare Volume Shampoo 32 ingredients

Ouai Medium Hair Shampoo 40 ingredients

Loading routine usage...
Loading routine usage...

Reviews

Here's what our community thinks

Monday Haircare Volume Shampoo 32 ingredients

Volume Shampoo hasn't been rated yet.
Rate it now

Ouai Medium Hair Shampoo 40 ingredients

4.0 /5
from 1 review

Alternatives

Our Dupe Finder has found 50 potential alternatives that have similar ingredients to Monday Haircare Volume Shampoo.

See 50 alternatives

Our Dupe Finder has found 50 potential alternatives that have similar ingredients to Ouai Medium Hair Shampoo.

See 50 alternatives
Loading similar comparisons...