Necessaire The Shampoo Versus Ouai Detox Shampoo

See how these products line up with your preferences

Here's our complete breakdown comparing the ingredients, attributes, and more of Necessaire The Shampoo versus Ouai Detox Shampoo .

Published on July 30, 2023

Overview

What they are

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

Suited For

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

Free From

They both do not contain any parabens, silicones or sulfates

What's Inside

They both contain fragrances

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

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Necessaire The Shampoo

Ouai Detox Shampoo

Shampoo Brand

Shampoo American Brand United States

Shampoo

Detergent or soap for cleansing the hair.

Shampoo

Detergent or soap for cleansing the hair.

Price

Buy The Shampoo

Buy Detox Shampoo

Ingredient Info

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

Necessaire The Shampoo 21 ingredients

Ouai Detox Shampoo 33 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

Necessaire The Shampoo 21 ingredients

Ouai Detox Shampoo 33 ingredients

Notable Ingredients

Niacinamide

Hyaluronic Acid

Benefits

Hydrating (2)

Good For Oily Skin

Redness Reducing (2)

Reduces Irritation (2)

Reduces Large Pores

Dark Spots

Acne Fighting

Brightening (2)

Concerns

Drying

Acne Trigger

Rosacea

Eczema

Benefits

Hydrating

Brightening

Concerns

Drying (2)

May Worsen Oily Skin

Acne Trigger

Irritating (3)

Rosacea (3)

Eczema (4)

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Ingredients Compared

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

Necessaire The Shampoo 21 ingredients

Ouai Detox Shampoo 33 ingredients

Water • Sodium Lauroyl Methyl Isethionate • Aloe Barbadensis Leaf Juice • Cocamidopropyl Betaine • Sodium Methyl Oleoyl Taurate • Sodium Cocoyl Isethionate • Propanediol • Niacinamide • Sodium Hyaluronate • Panthenol • Apium Graveolens Seed Extract • Persea Gratissima Oil • Glycerin • Disodium Cocoyl Glutamate • Caprylic/Capric Triglyceride • Citric Acid • Caprylhydroxamic Acid • Sodium Chloride • 1,2-Hexanediol • Caprylyl Glycol • Sodium Benzoate

Water • Sodium C14-16 Olefin Sulfonate • Sodium Lauroyl Methyl Isethionate • Cocamidopropyl Betaine • Decyl Glucoside • Acrylates Copolymer • Cocamide Mipa • Parfum • Polysorbate 20 • Hydrolyzed Keratin • Hydroxypropyl Guar Hydroxypropyltrimonium Chloride • Vinegar • Peg-150 Distearate • Polyquaternium-7 • Glycerin • Benzophenone-4 • Sodium Chloride • Sodium Hydroxide • Tetrasodium EDTA • Trisodium Ethylenediamine Disuccinate • Isopropyl Alcohol • Propylene Glycol • Citric Acid • Disodium EDTA • Chlorphenesin • Sodium Benzoate • Phenoxyethanol • Potassium Sorbate • Linalool • Citronellol • CI 14700 • CI 19140 • CI 61570

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.

Water

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

Necessaire The Shampoo contains this as ingredient number 1.

Ouai Detox Shampoo contains this as ingredient number 1.

Sodium Lauroyl Methyl Isethionate

What it does: Cleansing

Community Rating: Liked

Sodium Lauroyl Methyl Isethionate is a cleansing ingredient. It is a surfactant, meaning it helps gather dirt, oil, and other pollutants. This helps them be rinsed away easily.

Necessaire The Shampoo contains this as ingredient number 2.

Ouai Detox Shampoo contains this as ingredient number 3.

Cocamidopropyl Betaine

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

Necessaire The Shampoo contains this as ingredient number 4.

Ouai Detox Shampoo contains this as ingredient number 4.

Glycerin

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

Necessaire The Shampoo contains this as ingredient number 13.

Ouai Detox Shampoo contains this as ingredient number 15.

Citric Acid

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

Necessaire The Shampoo contains this as ingredient number 16.

Ouai Detox Shampoo contains this as ingredient number 23.

Sodium Chloride

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

Necessaire The Shampoo contains this as ingredient number 18.

Ouai Detox Shampoo contains this as ingredient number 17.

Sodium Benzoate

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

Necessaire The Shampoo contains this as ingredient number 21.

Ouai Detox Shampoo contains this as ingredient number 26.

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