Here's our complete breakdown comparing the ingredients, attributes, and more of The INKEY List Peptide Volumizing Hair Treatment versus The Ordinary Multi-Peptide Serum for Hair Density .
Last updated on October 25, 2023. Published on August 22, 2022
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 and sensitive skin
Free From
They both do not contain any harsh alcohols, common allergens, parabens, silicones or sulfates
What's Inside
They both contain oils
We independently verify ingredients, and our claims are backed by peer-reviewed research. Spot a product that need an update? Let us know.
Hair Serum
Liquid-based hair treatment to help nourish the hair.
Hair Loss
Products to help treat hair loss and thinning hair.
Price
Ingredient Info
The INKEY List Peptide Volumizing Hair Treatment 20 ingredients
The Ordinary Multi-Peptide Serum for Hair Density 36 ingredients
Alcohol Free
This product is free of harsh alcohols 🎉
Silicon Free
This product is free of silicons 🎉
Contains Fragrance
Ingredients in this product that are forms of fragrance:
Sulfate Free
This product is free of sulfates 🎉
Paraben Free
This product is free of parabens 🎉
Contains Oils
Ingredients in this product that are types of oil:
Not Malassezia Safe
Ingredients in this product that are not malassezia safe:
Reef Safe
This product is free of ingredients that damage reefs 🎉
EU Allergen Free
This product is free of EU allergens 🎉
Vegan
This product is vegan 🎉
Cruelty Free
This product is cruelty-free 🎉
Alcohol Free
This product is free of harsh alcohols 🎉
Silicon Free
This product is free of silicons 🎉
Fragrance Free
This product is free of fragrances 🎉
Sulfate Free
This product is free of sulfates 🎉
Paraben Free
This product is free of parabens 🎉
Contains Oils
Ingredients in this product that are types of oil:
Not Malassezia Safe
Ingredients in this product that are not malassezia safe:
Reef Safe
This product is free of ingredients that damage reefs 🎉
EU Allergen Free
This product is free of EU allergens 🎉
Vegan
This product is vegan 🎉
Cruelty Free
This product is cruelty-free 🎉
At a glance
Click on any of the items below to learn more
The INKEY List Peptide Volumizing Hair Treatment 20 ingredients
The Ordinary Multi-Peptide Serum for Hair Density 36 ingredients
Notable Ingredients
This product contains 1 ingredient that may have this attribute:
This product contains 1 ingredient that may have this attribute:
Benefits
This product contains 1 ingredient that may have this attribute:
This product contains 1 ingredient that may have this attribute:
Notable Ingredients
This product contains 1 ingredient that may have this attribute:
This product contains 1 ingredient that may have this attribute:
This product contains 2 ingredients that may have this attribute:
Benefits
This product contains 1 ingredient that may have this attribute:
This product contains 1 ingredient that may have this attribute:
This product contains 1 ingredient that may have this attribute:
This product contains 2 ingredients that may have this attribute:
This product contains 3 ingredients that may have this attribute:
This product contains 3 ingredients that may have this attribute:
This product contains 1 ingredient that may have this attribute:
This product contains 2 ingredients that may have this attribute:
This product contains 1 ingredient that may have this attribute:
This product contains 2 ingredients that may have this attribute:
Concerns
This product contains 1 ingredient that may have this attribute:
This product contains 1 ingredient that may have this attribute:
This product contains 1 ingredient that may have this attribute:
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Join SkinSortIngredients Compared
Ingredients that are highlighted in purple are present in both products.
The INKEY List Peptide Volumizing Hair Treatment 20 ingredients
The Ordinary Multi-Peptide Serum for Hair Density 36 ingredients
Water • Pisum Sativum Peptide • Betaine • Glycerin • Panthenol • Peg-40 Hydrogenated Castor Oil • Phenoxyethanol • Polyquaternium-37 • Citronellyl Methylcrotonate • Ethylhexylglycerin • Ceratonia Siliqua Seed Extract • Hydrolyzed Soy Protein • Zea Mays Starch • Leuconostoc/Radish Root Ferment Filtrate • Trisodium Ethylenediamine Disuccinate • Polyquaternium-16 • Potassium Sorbate • Sodium Benzoate • Guar Hydroxypropyltrimonium Chloride • Polyquaternium-7
Water • Propanediol • Butylene Glycol • Glycerin • Caffeine • Biotinoyl Tripeptide-1 • Acetyl Tetrapeptide-3 • Larix Europaea Wood Extract • Pisum Sativum Extract • Scutellaria Baicalensis Root Extract • Triticum Vulgare Germ Extract • Glycine Soja Germ Extract • Trifolium Pratense Flower Extract • Camellia Sinensis Leaf Extract • Apigenin • Oleanolic Acid • Arginine • Glycine • Calcium Gluconate • Zinc Chloride • Lactic Acid • Gluconolactone • Dextran • Maltodextrin • Hydroxyethylcellulose • Xanthan Gum • Pentylene Glycol • Dimethyl Isosorbide • Polysorbate 20 • Ppg-26-Buteth-26 • Peg-40 Hydrogenated Castor Oil • Trisodium Ethylenediamine Disuccinate • Sodium Metabisulfite • Sodium Benzoate • Phenoxyethanol • Chlorphenesin
Ingredients Side-by-side
Ingredients that are highlighted in purple are present in both products.
Learn more about what what Com. / Irr. ratings are
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. Talk about multi-purpose! If you see this, drink a glass of water. Stay hydrated!
Learn more about WaterThe INKEY List Peptide Volumizing Hair Treatment contains this as ingredient number 1.
The Ordinary Multi-Peptide Serum for Hair Density contains this as ingredient number 1.
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 GlycerinThe INKEY List Peptide Volumizing Hair Treatment contains this as ingredient number 4.
The Ordinary Multi-Peptide Serum for Hair Density contains this as ingredient number 4.
Peg-40 Hydrogenated Castor Oil is derived from castor oil and polyethylene glycol (PEG). It is used as a emollient and emulsifier.
As an emulsifier, it helps prevent ingredients from separating. It also helps make the other ingredients more soluble; it is often used to solubilize fragrances. This increases spreadability and elongates shelf life in a product.
Emollients help soothe and soften the skin. They do this by creating a protective film on your skin. This barrier helps trap moisture and keeps your skin hydrated. Emollients may be effective at treating dry or itchy skin.
This ingredient may or may not be vegan, depending on the source.
Peg-40 Hydrogenated Castor Oil may not be fungal-acne safe. We recommend speaking with a professional if you have any questions or concerns.
Learn more about Peg-40 Hydrogenated Castor OilThe INKEY List Peptide Volumizing Hair Treatment contains this as ingredient number 6.
The Ordinary Multi-Peptide Serum for Hair Density contains this as ingredient number 31.
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.
The INKEY List Peptide Volumizing Hair Treatment contains this as ingredient number 7.
The Ordinary Multi-Peptide Serum for Hair Density contains this as ingredient number 35.
Trisodium Ethylenediamine Disuccinate is used to help stabilize a product.
It is a chelating agent, meaning it helps prevent metal ions from binding to other ingredients. This prevents unwanted reactions in products. Metal ions can come into a product via the water ingredient. They are found in trace amounts and are not known to be harmful.
The INKEY List Peptide Volumizing Hair Treatment contains this as ingredient number 15.
The Ordinary Multi-Peptide Serum for Hair Density contains this as ingredient number 32.
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 BenzoateThe INKEY List Peptide Volumizing Hair Treatment contains this as ingredient number 18.
The Ordinary Multi-Peptide Serum for Hair Density contains this as ingredient number 34.
Here's what our community thinks of the ingredients in these two products.
The INKEY List Peptide Volumizing Hair Treatment 20 ingredients
The Ordinary Multi-Peptide Serum for Hair Density 36 ingredients
Usage
Here's some more info on how this product is used by our community.
When to use
The INKEY List Peptide Volumizing Hair Treatment 20 ingredients
The Ordinary Multi-Peptide Serum for Hair Density 36 ingredients
Reviews
Here's what our community thinks
The INKEY List Peptide Volumizing Hair Treatment 20 ingredients
Alternatives
Our Dupe Finder has found 3 potential alternatives that have similar ingredients to The INKEY List Peptide Volumizing Hair Treatment.
See 3 alternativesOur Dupe Finder has found 3 potential alternatives that have similar ingredients to The Ordinary Multi-Peptide Serum for Hair Density.
See 3 alternatives
