The INKEY List Brighten-I Eye Cream Versus Peter Thomas Roth Peptide Skinjection Fill + Fix Under-Eye Cream
Updated on February 23, 2025
Overview
What they are
These products are both eye moisturizers. They have a total of 12 ingredients in common
Cool Features
They both contain exfoliants and hyaluronic acid
Suited For
They're both likely to be good for dry skin and brightening skin
Free From
They both do not contain any parabens or sulfates
What's Inside
They both contain 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
The INKEY List Brighten-I Eye Cream 30 ingredients
Peter Thomas Roth Peptide Skinjection Fill + Fix Under-Eye Cream 37 ingredients
About this product
About this product
At a glance
Click on any of the items below to learn more
The INKEY List Brighten-I Eye Cream 30 ingredients
Peter Thomas Roth Peptide Skinjection Fill + Fix Under-Eye Cream 37 ingredients
Key Ingredients
Benefits
Concerns
Key Ingredients
Benefits
Concerns
Ingredients Side-by-side
Water
Skin ConditioningDimethicone
Emollient
Coco-Caprylate/Caprate
Emollient
Glycerin
Humectant
Caprylic/Capric Triglyceride
MaskingGlyceryl Stearate
Emollient
Candelilla/Jojoba/Rice Bran Polyglyceryl-3 Esters
Emulsifying
Punica Granatum Seed Oil
Emollient
Ethylhexyl Palmitate
Emollient
Mica
Cosmetic Colorant
Phenoxyethanol
Preservative
Cetearyl Alcohol
Emollient
Sodium Stearoyl Lactylate
EmulsifyingBenzyl Alcohol
Perfuming
Polysilicone-11
Hydroxyacetophenone
Antioxidant
Sodium Stearoyl Glutamate
CleansingTocopheryl Acetate
Antioxidant
Acrylates/C10-30 Alkyl Acrylate Crosspolymer
Emulsion StabilisingSodium Gluconate
Skin ConditioningEthylhexylglycerin
Skin ConditioningSilica
Abrasive
Dehydroacetic Acid
Preservative
Diglucosyl Gallic Acid
Sodium Hydroxide
BufferingTrihydroxystearin
Skin Conditioning
Tin Oxide
Abrasive
Sodium Hyaluronate
Humectant
Glucomannan
Skin ConditioningCI 77891
Cosmetic ColorantWater, Dimethicone, Coco-Caprylate/Caprate, Glycerin, Caprylic/Capric Triglyceride, Glyceryl Stearate, Candelilla/Jojoba/Rice Bran Polyglyceryl-3 Esters, Punica Granatum Seed Oil, Ethylhexyl Palmitate, Mica, Phenoxyethanol, Cetearyl Alcohol, Sodium Stearoyl Lactylate, Benzyl Alcohol, Polysilicone-11, Hydroxyacetophenone, Sodium Stearoyl Glutamate, Tocopheryl Acetate, Acrylates/C10-30 Alkyl Acrylate Crosspolymer, Sodium Gluconate, Ethylhexylglycerin, Silica, Dehydroacetic Acid, Diglucosyl Gallic Acid, Sodium Hydroxide, Trihydroxystearin, Tin Oxide, Sodium Hyaluronate, Glucomannan, CI 77891
Water
Skin ConditioningDimethicone
Emollient
Butylene Glycol
Humectant
Cetyl PEG/PPG-10/1 Dimethicone
Emulsifying
Glycerin
Humectant
Polysilicone-11
Bellis Perennis Flower Extract
Skin ConditioningPEG/PPG-18/18 Dimethicone
Emulsifying
Sh-Pentapeptide-5
Skin Conditioning
Hieracium Pilosella Extract
MaskingCaffeine
Skin ConditioningSodium Hyaluronate
Humectant
Potassium Glutathione Isomerized Linoleate
Glucomannan
Skin ConditioningSodium Chloride
Masking
Silica
Abrasive
Silica Silylate
EmollientSodium Citrate
BufferingCitric Acid
Buffering
Trihydroxystearin
Skin Conditioning
Ethylhexyl Palmitate
Emollient
Lauryl Glucoside
CleansingSodium Benzoate
Masking
Ethylhexylglycerin
Skin ConditioningPotassium Chloride
Tetrasodium Glutamate Diacetate
Propylene Glycol
Humectant
Decyl Glucoside
CleansingTrisiloxane
Skin Conditioning
Potassium Sorbate
Preservative
Sodium Dehydroacetate
Preservative
1,2-Hexanediol
Skin ConditioningMica
Cosmetic Colorant
Triethoxycaprylylsilane
Titanium Dioxide
Cosmetic Colorant
Iron Oxides
Phenoxyethanol
Preservative
Water, Dimethicone, Butylene Glycol, Cetyl PEG/PPG-10/1 Dimethicone, Glycerin, Polysilicone-11, Bellis Perennis Flower Extract, PEG/PPG-18/18 Dimethicone, Sh-Pentapeptide-5, Hieracium Pilosella Extract, Caffeine, Sodium Hyaluronate, Potassium Glutathione Isomerized Linoleate, Glucomannan, Sodium Chloride, Silica, Silica Silylate, Sodium Citrate, Citric Acid, Trihydroxystearin, Ethylhexyl Palmitate, Lauryl Glucoside, Sodium Benzoate, Ethylhexylglycerin, Potassium Chloride, Tetrasodium Glutamate Diacetate, Propylene Glycol, Decyl Glucoside, Trisiloxane, Potassium Sorbate, Sodium Dehydroacetate, 1,2-Hexanediol, Mica, Triethoxycaprylylsilane, Titanium Dioxide, Iron Oxides, Phenoxyethanol
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 WaterDimethicone is a type of synthetic silicone created from natural materials such as quartz.
What it does:
Dimethicone comes in different viscosities:
Depending on the viscosity, dimethicone has different properties.
Ingredients lists don't always show which type is used, so we recommend reaching out to the brand if you have questions about the viscosity.
This ingredient is unlikely to cause irritation because it does not get absorbed into skin. However, people with silicone allergies should be careful about using this ingredient.
Note: Dimethicone may contribute to pilling. This is because it is not oil or water soluble, so pilling may occur when layered with products. When mixed with heavy oils in a formula, the outcome is also quite greasy.
Learn more about DimethiconeGlycerin 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 GlycerinEthylhexyl Palmitate is created from 2-ethylhexyl alcohol and palmitic acid. It is a fatty acid ester.
The fatty acid content of Ethylhexyl Palmitate makes it an emollient. Emollients help soften and hydrate your skin by trapping moisture within.
Ethylhexyl Palmitate is also used to help improve the texture of cosmetics. It helps other ingredient dissolve in products and help disperse ingredients more evenly. In fact, it is commonly used to evenly mix sunscreen ingredients such as avobenzone and ethylhexyl triazone. It can also help stabilize the fragrances in a product as a fragrance fixative.
Ethylhexyl Palmitate can be used to substitute mineral oil.
Learn more about Ethylhexyl PalmitateMica refers to a group of silicate minerals. Mica crystals are easily split to give products a shimmer. These crystals are able to reflect light to temporarily give your skin a glowy look.
Mica is found to be safe. Trace amounts of heavy metals may be found in mica, but these metals are not harmful in our personal products.
Mica has been used since prehistoric times throughout the world. Ancient Egyptian, Indian, Greek, Roman, Aztec, and Chinese civilizations have used mica.
Mica can be naturally found throughout the world. However, some sources of mica may be controversial. In 2016, mica mined in the Jharkhand state in India was found to be using child labor. However, companies are able to source ethical mica affiliated with international organizations that monitor the mica supply chain.
Learn more about MicaPhenoxyethanol 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.
We don't have a description for Polysilicone-11 yet.
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.
Silica is a mineral naturally found in our skin. It helps to thicken and smooth the texture of a product. It also acts as an agent for other ingredients by increasing the absorption of other ingredients into the skin.
Silica is often used for absorption and can help reduce shine when products are applied. Silica occurs in naturally in materials like clay and sandstone, and it can also be produced synthetically.
Silica is present naturally within the skin during collagen production and when reducing inflammation.
Learn more about SilicaThis ingredient comes from Hydroxystearic Acid, a fatty acid, and glycerin. It is used to thicken oils.
Due to its fatty acid content, it is a natural emollient.
Creating trihydroxystearin involves using a chemical reaction between hydrogen and castor oil.
This ingredient may not be Malassezia folliculitis safe.
Learn more about TrihydroxystearinSodium Hyaluronate is hyaluronic acid's salt form. It is commonly derived from the sodium salt of hyaluronic acid.
Like hyaluronic acid, it is great at holding water and acts as a humectant. This makes it a great skin hydrating ingredient.
Sodium Hyaluronate is naturally occurring in our bodies and is mostly found in eye fluid and joints.
These are some other common types of Hyaluronic Acid:
Learn more about Sodium HyaluronateGlucomannan is a fiber created from the Konjac plant. It is an emulsifier and thickener.
The high polysaccharide content makes it great at adjusting the texture of products. (Kind of like starch).
Polysaccharides also help our skin stay hydrated.
This ingredient is water-soluble.
Learn more about GlucomannanIngredient Ratings
Here's what our community thinks of the ingredients in these products.
When to use
The INKEY List Brighten-I Eye Cream 30 ingredients
Peter Thomas Roth Peptide Skinjection Fill + Fix Under-Eye Cream 37 ingredients
Reviews
Here's what our community thinks
The INKEY List Brighten-I Eye Cream 30 ingredients
Good, but not a stand-alone eye product
Like everything from the Inkey List, this is affordable, reliable, and well formulated, if not a product no one can live without. To get the full benefit, you have to use a hydrating toner/mist and pair this eye cream with the Inkey List caffeine eye cream in the morning and retinol eye cream at night.
Irritating and gave me an allergic reaction. The applicator is made of nickel.
