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Product Comparison

Here's our complete breakdown comparing the ingredients, attributes, and more of Olaplex No.4 Bond Maintenance Shampoo versus Monday Haircare Smooth Shampoo .

Published on December 12, 2023

Overview

What they are

These products are both vegan, cruelty-free, and reef safe shampoos. They have a total of 14 ingredients in common

Cool Features

They both contain AHA and Vitamin E

Suited For

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

Free From

They both do not contain any parabens

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 need an update? Let us know.

Shampoo American Brand United States
Shampoo New Zealander Brand New Zealand

Shampoo

Detergent or soap for cleansing the hair.

Shampoo

Detergent or soap for cleansing the hair.

Price

Shop

Buy No.4 Bond Maintenance Shampoo

Starts at $14.00
Shop

Buy Smooth Shampoo

Starts at $6.97

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

AHA
Vitamin E
Hyaluronic Acid

Benefits

Hydrating (4)
Reduces Irritation
Skin Texture
Reduces Large Pores
Anti-Aging (2)
Dark Spots
Scar Healing (2)
Brightening (3)

Concerns

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

Notable Ingredients

AHA
Vitamin E

Benefits

Hydrating (2)
Skin Texture
Reduces Large Pores
Scar Healing
Brightening (3)

Concerns

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

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

WaterSodium Lauroyl Methyl IsethionateCocamidopropyl HydroxysultainePotassium Cocoyl GlycinateDisodium Cocoyl GlutamatePotassium CocoateSodium Lauroyl SarcosinateGlycereth-26Decyl GlucosideParfumPhenoxyethanolCocamidopropylamine OxideSodium Cocoyl GlutamateGlycol DistearateDisodium Laureth SulfosuccinateMethyl Gluceth-20Acrylates CopolymerPeg-120 Methyl Glucose DioleateAmodimethiconePolyquaternium-10 Citric AcidEthylhexylglycerinSodium Lauryl SulfoacetateDivinyldimethicone/Dimethicone CopolymerChlorphenesinPolyquaternium-11Guar Hydroxypropyltrimonium ChlorideC11-15 Pareth-7Trisodium Ethylenediamine DisuccinateLaureth-9GlycerinTrideceth-12PanthenolHydrolyzed Vegetable Protein Pg-Propyl SilanetriolC12-13 Pareth-3C12-13 Pareth-23Helianthus Annuus Seed OilTocopherolPseudozyma Epicola/Camellia Sinensis Seed Oil Ferment Extract FiltrateArgania Spinosa Kernel OilRice Ferment FiltratePrunus Armeniaca Kernel OilQuaternium-95PropanediolHelianthus Annuus Seed ExtractPeg-8Bis-Aminopropyl Diglycol DimaleateEuterpe Oleracea Fruit ExtractRosmarinus Officinalis Leaf ExtractPunica Granatum ExtractOriganum Vulgare Leaf ExtractMusa Sapientum Fruit ExtractMorinda Citrifolia Fruit ExtractSodium HyaluronatePeg-8/Smdi CopolymerArctium Lappa Root ExtractSodium PolyacrylatePalmitoyl Myristyl SerinateCitralHexyl CinnamalLimoneneBiotinPentaerythrityl Tetra-Di-T-Butyl Hydroxyhydrocinnamate

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: 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.4 Bond Maintenance Shampoo contains this as ingredient number 1.

Monday Haircare Smooth Shampoo contains this as ingredient number 1.

2
What it does: Cleansing, Skin Conditioning
Community Rating: Disliked

Cocamidopropyl Hydroxysultaine is a synthetic cleansing agent, though it is derived from coconut oil.

It is used to enhance the texture of products by boosting lather and thickening the texture. As a cleanser, Cocamidopropyl Hydroxysultaine is mild.

Olaplex No.4 Bond Maintenance Shampoo contains this as ingredient number 3.

Monday Haircare Smooth Shampoo contains this as ingredient number 6.

3
What it does: Cleansing, Emulsifying, Foaming, Skin Conditioning
Community Rating: Disliked

Sodium Lauroyl Sarcosinate is a cleansing agent and emulsifier. It is a surfactant derived from sarcosine, and a common source is coconut oil. As a surfactant, Sodium Lauroyl Sarcosinate helps lift dirts, oil, and other molecules to be washed away. In leave-on products, this ingredient is used as an emulsifier. Emulsifier help prevent ingredients such as oils and waters from separating.

Sodium Lauroyl Sarcosinate is also commonly found as a foaming agent in shampoo, toothpaste, and shaving foam. It is amphiphilic, meaning it loves both water and fats.

Olaplex No.4 Bond Maintenance Shampoo contains this as ingredient number 7.

Monday Haircare Smooth Shampoo contains this as ingredient number 16.

4
What it does: Cleansing, Emulsion Stabilising
Community Rating: Mixed

Decyl Glucoside is a glucose-based surfactant. Surfactants help clean the skin by trapping oil, sebum, and dirt to be washed away.

It is created by reacting glucose with the fatty acids from plants.

Decyl Glucoside also helps stabilize the ingredients in a product by preventing them from separating.

This ingredient is biodegradable and non-toxic. This ingredient is commonly found in baby shampoos.

Decyl Glucoside is sometimes used to stabilize the UV filter Tinosorb.

Learn more about Decyl Glucoside

Olaplex No.4 Bond Maintenance Shampoo contains this as ingredient number 9.

Monday Haircare Smooth Shampoo contains this as ingredient number 14.

5
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.4 Bond Maintenance Shampoo contains this as ingredient number 10.

Monday Haircare Smooth Shampoo contains this as ingredient number 43.

6
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.

Olaplex No.4 Bond Maintenance Shampoo contains this as ingredient number 11.

Monday Haircare Smooth Shampoo contains this as ingredient number 29.

7
What it does: Emollient, Emulsifying, Skin Conditioning
Community Rating: Very Disliked

Glycol Distearate serves as a pearlizing or opacifying agent in cosmetic products.

It's often included in cleansers and haircare products to give them a lustrous or shimmering appearance.

It is derived from stearic acid, a natural fatty acid commonly found in vegetable oils and animal fats.

Glycol Distearate isn't fungal acne safe.

Learn more about Glycol Distearate

Olaplex No.4 Bond Maintenance Shampoo contains this as ingredient number 14.

Monday Haircare Smooth Shampoo contains this as ingredient number 23.

8
What it does: Cleansing, Foaming
Community Rating: Disliked

We don't have a description for Disodium Laureth Sulfosuccinate.

Olaplex No.4 Bond Maintenance Shampoo contains this as ingredient number 15.

Monday Haircare Smooth Shampoo contains this as ingredient number 2.

9
What it does: Emulsifying
Community Rating: Very Disliked

Peg-120 Methyl Glucose Dioleate is used to improve texture and stability of a product. It is sugar based and helps thicken a product.

Once applied, it also creates a thin film to trap moisture in. This helps keep your skin hydrated.

This ingredient is the polyethylene glycol ether of the diester of oleic acid and methylglucose. The 120 represents an average of 120 moles of ethylene oxide.

There is limited research on this ingredient, although it is considered safe to use in skincare products.

Learn more about Peg-120 Methyl Glucose Dioleate

Olaplex No.4 Bond Maintenance Shampoo contains this as ingredient number 18.

Monday Haircare Smooth Shampoo contains this as ingredient number 21.

10
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

Olaplex No.4 Bond Maintenance Shampoo contains this as ingredient number 21.

Monday Haircare Smooth Shampoo contains this as ingredient number 12.

11
What it does: Skin Conditioning
Community Rating: Mixed

Ethylhexylglycerin (we can't pronounce this either) is commonly used as a preservative and skin softener. It is derived from glyceryl.

You might see Ethylhexylglycerin often paired with other preservatives such as phenoxyethanol. Ethylhexylglycerin has been found to increase the effectiveness of these other preservatives.

Olaplex No.4 Bond Maintenance Shampoo contains this as ingredient number 22.

Monday Haircare Smooth Shampoo contains this as ingredient number 28.

12
What it does: Skin Conditioning
Community Rating: Liked

This ingredient is derived from guar gum.

It is a conditioning ingredient, meaning it helps soften skin and hair.

Olaplex No.4 Bond Maintenance Shampoo contains this as ingredient number 27.

Monday Haircare Smooth Shampoo contains this as ingredient number 18.

13
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

Olaplex No.4 Bond Maintenance Shampoo contains this as ingredient number 31.

Monday Haircare Smooth Shampoo contains this as ingredient number 7.

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

Olaplex No.4 Bond Maintenance Shampoo contains this as ingredient number 60.

Monday Haircare Smooth Shampoo contains this as ingredient number 36.

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

25% are loved or liked
19% have mixed ratings
27% are disliked or very disliked
29% have no rating yet
14% are loved or liked
7% have mixed ratings
58% are disliked or very disliked
21% 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.4 Bond Maintenance Shampoo 63 ingredients

2.6 /5
from 5 ratings
Color Care (1)
BubbIes's avatar

BubbIes

2 months ago · Combination Skin
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...

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.

Monday Haircare Smooth Shampoo 43 ingredients

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

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