K18 Hair PEPTIDE PREP™ pH Maintenance Shampoo Versus Revolution Beauty R-Peptide 4x4 Leave In Restore Mask
Updated on August 26, 2024
Overview
What they are
These products are both vegan, cruelty-free, and reef safe . They have a total of 6 ingredients in common
Cool Features
They both contain peptides
Suited For
They're both likely to be good for dry skin, brightening skin, sensitive skin and scar healing
Free From
They both do not contain any 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 needs an update? Let us know.
Ingredient Info
K18 Hair PEPTIDE PREP™ pH Maintenance Shampoo 18 ingredients
Revolution Beauty R-Peptide 4x4 Leave In Restore Mask 53 ingredients
What's inside (and what isn't)
What's inside (and what isn't)
At a glance
Click on any of the items below to learn more
K18 Hair PEPTIDE PREP™ pH Maintenance Shampoo 18 ingredients
Revolution Beauty R-Peptide 4x4 Leave In Restore Mask 53 ingredients
Benefits
Concerns
Key Ingredients
Benefits
Concerns
Ingredients Side-by-side
Water
Skin ConditioningSodium C14-16 Olefin Sulfonate
Cleansing
Cocamidopropyl Betaine
Cleansing
Sodium Methyl 2-Sulfolaurate
CleansingSodium Lauryl Sulfoacetate
CleansingSh-Oligopeptide-78
Panthenol
Skin Conditioning
Glycerin
Humectant
Sodium Phytate
Guar Hydroxypropyltrimonium Chloride
Skin ConditioningDisodium 2-Sulfolaurate
CleansingCaprylyl Glycol
EmollientCaprylhydroxamic Acid
Benzoic Acid
Masking
Citric Acid
Buffering
Sodium Hydroxide
BufferingParfum
Masking
Limonene
Perfuming
Water, Sodium C14-16 Olefin Sulfonate, Cocamidopropyl Betaine, Sodium Methyl 2-Sulfolaurate, Sodium Lauryl Sulfoacetate, Sh-Oligopeptide-78, Panthenol, Glycerin, Sodium Phytate, Guar Hydroxypropyltrimonium Chloride, Disodium 2-Sulfolaurate, Caprylyl Glycol, Caprylhydroxamic Acid, Benzoic Acid, Citric Acid, Sodium Hydroxide, Parfum, Limonene
Water
Skin ConditioningAlcohol Denat.
Antimicrobial
Cetearyl Alcohol
Emollient
Propanediol
Solvent
Behentrimonium Chloride
Preservative
Polysorbate 20
Emulsifying
Arginine Hcl
Skin ConditioningDicaprylyl Ether
Emollient
Cetyl Alcohol
Emollient
Isododecane
EmollientMaleic Acid
BufferingCannabis Sativa Seed Oil
Emollient
Parfum
Masking
Butylene Glycol
Humectant
Hydrogenated Polydecene
EmollientPhenoxyethanol
Preservative
Dimethicone
Emollient
Bis-PCA Dimethicone
Glycerin
Humectant
Isopropyl Alcohol
Solvent
Sodium Hydroxide
BufferingSodium PCA
Humectant
Aminomethyl Propanol
BufferingSodium Lactate
Buffering4-PCA Dimethicone
Skin Conditioning
Disodium PEG-12 Dimethicone Sulfosuccinate
CleansingStearyl Alcohol
Emollient
Ethylhexylglycerin
Skin ConditioningArginine
Masking
Aspartic Acid
Masking
PCA
Humectant
Chenopodium Quinoa Seed Extract
Skin ConditioningGlycine
Buffering
Alanine
MaskingSerine
Masking
Valine
MaskingCopper Tripeptide-34
Skin Conditioning
Proline
Skin ConditioningThreonine
Isoleucine
Skin ConditioningPotassium Sorbate
Preservative
Sodium Benzoate
Masking
Histidine
Humectant
Phenylalanine
Masking
Tocopherol
Antioxidant
Caprylyl Glycol
EmollientHexylene Glycol
EmulsifyingAlpha-Isomethyl Ionone
Perfuming
Benzyl Benzoate
Antimicrobial
Eugenol
Perfuming
Hexyl Cinnamal
Perfuming
Limonene
Perfuming
Linalool
Perfuming
Water, Alcohol Denat., Cetearyl Alcohol, Propanediol, Behentrimonium Chloride, Polysorbate 20, Arginine Hcl, Dicaprylyl Ether, Cetyl Alcohol, Isododecane, Maleic Acid, Cannabis Sativa Seed Oil, Parfum, Butylene Glycol, Hydrogenated Polydecene, Phenoxyethanol, Dimethicone, Bis-PCA Dimethicone, Glycerin, Isopropyl Alcohol, Sodium Hydroxide, Sodium PCA, Aminomethyl Propanol, Sodium Lactate, 4-PCA Dimethicone, Disodium PEG-12 Dimethicone Sulfosuccinate, Stearyl Alcohol, Ethylhexylglycerin, Arginine, Aspartic Acid, PCA, Chenopodium Quinoa Seed Extract, Glycine, Alanine, Serine, Valine, Copper Tripeptide-34, Proline, Threonine, Isoleucine, Potassium Sorbate, Sodium Benzoate, Histidine, Phenylalanine, Tocopherol, Caprylyl Glycol, Hexylene Glycol, Alpha-Isomethyl Ionone, Benzyl Benzoate, Eugenol, Hexyl Cinnamal, Limonene, Linalool
Ingredients Explained
These ingredients are found in both products.
Ingredients higher up in an ingredient list are typically present in a larger amount.
Caprylyl Glycol is a humectant and emollient, meaning it attracts and preserves moisture.
It is a common ingredient in many products, especially those designed to hydrate skin. The primary benefits are retaining moisture, skin softening, and promoting a healthy skin barrier.
Though Caprylyl Glycol is an alcohol derived from fatty acids, it is not the kind that can dry out skin.
This ingredient is also used as a preservative to extend the life of products. It has slight antimicrobial properties.
Learn more about Caprylyl GlycolGlycerin 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 GlycerinLimonene 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 LimoneneParfum 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 ParfumSodium Hydroxide is also known as lye or caustic soda. It is used to adjust the pH of products; many ingredients require a specific pH to be effective.
In small amounts, sodium hydroxide is considered safe to use. However, large amounts may cause chemical burns due to its high alkaline.
Your skin has a natural pH and acid mantle. This acid mantle helps prevent harmful bacteria from breaking through. The acid mantle also helps keep your skin hydrated.
"Alkaline" refers to a high pH level. A low pH level would be considered acidic.
Learn more about Sodium HydroxideWater. 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. If you see this, drink a glass of water. Stay hydrated!
Learn more about WaterIngredient Ratings
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