Joico Defy Damage Protective Shampoo Versus K18 Hair Damage Shield pH Protective Shampoo
Updated on November 12, 2024
Overview
What they are
These products are both cruelty-free and reef safe shampoos. They have a total of 8 ingredients in common
Cool Features
They both contain peptides
Suited For
They're both likely to be good for dry skin and sensitive skin
Free From
They both do not contain any harsh alcohols or parabens
What's Inside
They both contain 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
Joico Defy Damage Protective Shampoo 40 ingredients
K18 Hair Damage Shield pH Protective Shampoo 19 ingredients
About this product
About this product
At a glance
Click on any of the items below to learn more
Joico Defy Damage Protective Shampoo 40 ingredients
K18 Hair Damage Shield pH Protective Shampoo 19 ingredients
Key Ingredients
Benefits
Concerns
Benefits
Concerns
Ingredients Side-by-side
Water
Skin ConditioningSodium C14-16 Olefin Sulfonate
Cleansing
Cocamidopropyl Betaine
Cleansing
Sodium Methyl Cocoyl Taurate
Cleansing
Sodium Lauroamphoacetate
CleansingLauryl Glucoside
CleansingDisodium Laureth Sulfosuccinate
CleansingBetaine
Humectant
Phenoxyethanol
Preservative
Sodium Lauryl Sulfoacetate
CleansingDimethicone Propyl Pg-Betaine
CleansingArginine
Masking
Avena Sativa Peptide
Skin Conditioning
Phosphatidylcholine
EmulsifyingMoringa Oleifera Seed Oil
Emollient
Laurdimonium Hydroxypropyl Hydrolyzed Keratin
Skin ConditioningArginine Hcl
Skin ConditioningGlycol Distearate
Emollient
Guar Hydroxypropyltrimonium Chloride
Skin ConditioningIsostearamide Mipa
Polyquaternium-47
Skin ConditioningCitric Acid
Buffering
Polyquaternium-7
Laureth-4
Emulsifying
PEG-120 Methyl Glucose Dioleate
Emulsifying
Dimethicone PEG-8 Meadowfoamate
Emollient
PEG-4 Laurate
Emulsifying
Quaternium-80
Methyl Gluceth-10
EmulsifyingMethoxy PEG/PPG-7/3 Aminopropyl Dimethicone
Tetrasodium EDTA
Glyceryl Laurate
Emollient
Tocopherol
Antioxidant
Rosa Canina Fruit Oil
Emollient
Dipropylene Glycol
MaskingC10-40 Isoalkylamidopropylethyldimonium Ethosulfate
Sodium Hydroxide
BufferingIodopropynyl Butylcarbamate
Preservative
Citronellol
Perfuming
Parfum
Masking
Water, Sodium C14-16 Olefin Sulfonate, Cocamidopropyl Betaine, Sodium Methyl Cocoyl Taurate, Sodium Lauroamphoacetate, Lauryl Glucoside, Disodium Laureth Sulfosuccinate, Betaine, Phenoxyethanol, Sodium Lauryl Sulfoacetate, Dimethicone Propyl Pg-Betaine, Arginine, Avena Sativa Peptide, Phosphatidylcholine, Moringa Oleifera Seed Oil, Laurdimonium Hydroxypropyl Hydrolyzed Keratin, Arginine Hcl, Glycol Distearate, Guar Hydroxypropyltrimonium Chloride, Isostearamide Mipa, Polyquaternium-47, Citric Acid, Polyquaternium-7, Laureth-4, PEG-120 Methyl Glucose Dioleate, Dimethicone PEG-8 Meadowfoamate, PEG-4 Laurate, Quaternium-80, Methyl Gluceth-10, Methoxy PEG/PPG-7/3 Aminopropyl Dimethicone, Tetrasodium EDTA, Glyceryl Laurate, Tocopherol, Rosa Canina Fruit Oil, Dipropylene Glycol, C10-40 Isoalkylamidopropylethyldimonium Ethosulfate, Sodium Hydroxide, Iodopropynyl Butylcarbamate, Citronellol, Parfum
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
BufferingSodium Chloride
Masking
Parfum
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, Sodium Chloride, Parfum, Limonene
Ingredients Explained
These ingredients are found in both products.
Ingredients higher up in an ingredient list are typically present in a larger amount.
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. If you see this, drink a glass of water. Stay hydrated!
Learn more about WaterSodium 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.
Cocamidopropyl Betaine is a fatty acid created by mixing similar compounds in coconut oil and dimethylaminopropylamine, a compound with two amino groups.
This ingredient 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 BetaineSodium Lauryl Sulfoacetate is an organic salt with a naturally sweet odor. It is an alternative to traditional sulfates and is commonly found in "sulfate-free" products.
In cosmetics, this ingredient is used to increase the volume of foam, emulsify ingredients, and as a cleansing agent.
As a cleansing agent, sodium lauryl sulfoacetate helps reduce the surface tension of dirt, oil, and other pollutants so they can be rinsed away easily.
Cosmetic Ingredient Review found this ingredient to irritate the eyes and skin in concentrations of 0.18% and 0.7%.
Learn more about Sodium Lauryl SulfoacetateThis ingredient is derived from guar gum.
It is a conditioning ingredient, meaning it helps soften skin and hair.
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 AcidSodium 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 HydroxideParfum 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 ParfumIngredient Ratings
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