Seen Shampoo - Fragrance Free Versus Four Reasons No Nothing Sensitive Repair Shampoo
Updated on March 18, 2025
Overview
What they are
These products are both vegan, 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, brightening skin and scar healing
Free From
They both do not contain any harsh alcohols, common allergens, fragrances, oils, parabens or silicones
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
Seen Shampoo 19 ingredients
Four Reasons No Nothing Sensitive Repair Shampoo 18 ingredients
About this product
About this product
At a glance
Click on any of the items below to learn more
Seen Shampoo 19 ingredients
Four Reasons No Nothing Sensitive Repair Shampoo 18 ingredients
Key Ingredients
Benefits
Key Ingredients
Benefits
Concerns
Ingredients Side-by-side
Water
Skin ConditioningSodium Lauroyl Methyl Isethionate
CleansingCocamidopropylamine Oxide
CleansingGlycerin
Humectant
Acrylates Copolymer
Glycol Distearate
Emollient
Trisodium Ethylenediamine Disuccinate
C13-15 Alkane
SolventGuar Hydroxypropyltrimonium Chloride
Skin ConditioningPolyquaternium-7
Bisabolol
Masking
Citric Acid
Buffering
Disodium EDTA
Phenoxyethanol
Preservative
Ethylhexylglycerin
Skin ConditioningAminomethyl Propanol
BufferingSodium Hydroxide
BufferingTocopherol
Antioxidant
Sodium Benzoate
Masking
Water, Sodium Lauroyl Methyl Isethionate, Cocamidopropylamine Oxide, Glycerin, Acrylates Copolymer, Glycol Distearate, Trisodium Ethylenediamine Disuccinate, C13-15 Alkane, Guar Hydroxypropyltrimonium Chloride, Polyquaternium-7, Bisabolol, Citric Acid, Disodium EDTA, Phenoxyethanol, Ethylhexylglycerin, Aminomethyl Propanol, Sodium Hydroxide, Tocopherol, Sodium Benzoate
Water
Skin ConditioningSodium Laureth Sulfate
Cleansing
Glycerin
Humectant
Sodium Lauroyl Sarcosinate
CleansingCocamidopropyl Betaine
Cleansing
Sodium Chloride
Masking
Citric Acid
Buffering
Glycol Distearate
Emollient
Guar Hydroxypropyltrimonium Chloride
Skin ConditioningSodium Benzoate
Masking
C12-13 Alkyl Lactate
EmollientHydrolyzed Vegetable Protein
Skin ConditioningHydrolyzed Vegetable Protein Pg-Propyl Silanetriol
Skin ConditioningCocamide Mea
EmulsifyingLaureth-10
EmulsifyingPotassium Sorbate
Preservative
Phenoxyethanol
Preservative
EDTA
Water, Sodium Laureth Sulfate, Glycerin, Sodium Lauroyl Sarcosinate, Cocamidopropyl Betaine, Sodium Chloride, Citric Acid, Glycol Distearate, Guar Hydroxypropyltrimonium Chloride, Sodium Benzoate, C12-13 Alkyl Lactate, Hydrolyzed Vegetable Protein, Hydrolyzed Vegetable Protein Pg-Propyl Silanetriol, Cocamide Mea, Laureth-10, Potassium Sorbate, Phenoxyethanol, EDTA
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 WaterGlycerin 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 GlycerinGlycol 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 DistearateThis 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 AcidPhenoxyethanol is a preservative that has germicide, antimicrobial, and aromatic properties. Studies show that phenoxyethanol can prevent 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.
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.
It 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 BenzoateIngredient Ratings
Here's what our community thinks of the ingredients in these products.
When to use
Seen Shampoo 19 ingredients
Four Reasons No Nothing Sensitive Repair Shampoo 18 ingredients
Reviews
Here's what our community thinks
Seen Shampoo 19 ingredients
This shampoo saved my dry scalp! So gentle on scalp. Pro-tip: as this is expensive just get the shampoo because that’s where sensitive skin ingredients matter more. For conditioner, you can probably find a cheaper clean one as long as it is alcohol-free
