Neutrogena Hydro Boost + Caffeine Eye Gel Cream Versus Kiehl's Powerful-Strength Dark Circle Reducing Vitamin C Eye Serum
Updated on March 10, 2025
Overview
What they are
These products are both reef safe eye moisturizers. They have a total of 9 ingredients in common
Cool Features
They both contain hyaluronic acid and peptides
Suited For
They're both likely to be good for anti aging, dry skin, brightening skin, sensitive skin and scar healing
Free From
They both do not contain any harsh alcohols, common allergens, fragrances, oils, 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
Neutrogena Hydro Boost + Caffeine Eye Gel Cream 19 ingredients
Kiehl's Powerful-Strength Dark Circle Reducing Vitamin C Eye Serum 26 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
Neutrogena Hydro Boost + Caffeine Eye Gel Cream 19 ingredients
Kiehl's Powerful-Strength Dark Circle Reducing Vitamin C Eye Serum 26 ingredients
Benefits
Key Ingredients
Benefits
Concerns
Ingredients Side-by-side
Water
Skin ConditioningGlycerin
Humectant
Dimethicone
Emollient
Cetearyl Olivate
Caffeine
Skin Conditioning
Sorbitan Olivate
Emulsifying
Ammonium Acryloyldimethyltaurate/Vp Copolymer
Caprylyl Glycol
EmollientPanthenol
Skin Conditioning
Ethylhexylglycerin
Skin ConditioningDimethicone Crosspolymer
Emulsion Stabilising
Dimethiconol
Emollient
Acetyl Glucosamine
Skin ConditioningSodium Hyaluronate
Humectant
Steareth-20
CleansingN-Hydroxysuccinimide
Skin ConditioningChrysin
Skin ConditioningPalmitoyl Tripeptide-1
Skin Conditioning
Palmitoyl Tetrapeptide-7
Skin Conditioning
Water, Glycerin, Dimethicone, Cetearyl Olivate, Caffeine, Sorbitan Olivate, Ammonium Acryloyldimethyltaurate/Vp Copolymer, Caprylyl Glycol, Panthenol, Ethylhexylglycerin, Dimethicone Crosspolymer, Dimethiconol, Acetyl Glucosamine, Sodium Hyaluronate, Steareth-20, N-Hydroxysuccinimide, Chrysin, Palmitoyl Tripeptide-1, Palmitoyl Tetrapeptide-7
Propylene Glycol
Humectant
Dimethicone
Emollient
Glycerin
Humectant
Ascorbic Acid
Antioxidant
Dimethicone Crosspolymer
Emulsion Stabilising
Cetyl PEG/PPG-10/1 Dimethicone
Emulsifying
Cyclohexasiloxane
Emollient
Water
Skin ConditioningHydroxyethylpiperazine Ethane Sulfonic Acid
BufferingLauroyl Lysine
Skin ConditioningAluminum Starch Octenylsuccinate
Absorbent
Polysilicone-11
CI 77891
Cosmetic ColorantAdenosine
Skin Conditioning
Hydrolyzed Hyaluronic Acid
Humectant
Steareth-20
CleansingChlorhexidine Digluconate
Antimicrobial
N-Hydroxysuccinimide
Skin ConditioningSodium Citrate
BufferingPotassium Sorbate
Preservative
Palmitoyl Tripeptide-1
Skin Conditioning
Chrysin
Skin ConditioningPentaerythrityl Tetra-Di-T-Butyl Hydroxyhydrocinnamate
Antioxidant
Palmitoyl Tetrapeptide-7
Skin Conditioning
Citric Acid
Buffering
Biotin
AntiseborrhoeicPropylene Glycol, Dimethicone, Glycerin, Ascorbic Acid, Dimethicone Crosspolymer, Cetyl PEG/PPG-10/1 Dimethicone, Cyclohexasiloxane, Water, Hydroxyethylpiperazine Ethane Sulfonic Acid, Lauroyl Lysine, Aluminum Starch Octenylsuccinate, Polysilicone-11, CI 77891, Adenosine, Hydrolyzed Hyaluronic Acid, Steareth-20, Chlorhexidine Digluconate, N-Hydroxysuccinimide, Sodium Citrate, Potassium Sorbate, Palmitoyl Tripeptide-1, Chrysin, Pentaerythrityl Tetra-Di-T-Butyl Hydroxyhydrocinnamate, Palmitoyl Tetrapeptide-7, Citric Acid, Biotin
Ingredients Explained
These ingredients are found in both products.
Ingredients higher up in an ingredient list are typically present in a larger amount.
We don't have a description for Chrysin yet.
Dimethicone 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 DimethiconeDimethicone Crosspolymer is a silicone created by modifying dimethicone with hydrocarbon side chains. Due to its large size, it does not penetrate skin. It is considered non-occlusive.
Dimethicone Crosspolymer is used to stabilize and thicken products. It also helps give products a silky feel.
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 GlycerinWe don't have a description for N-Hydroxysuccinimide yet.
Palmitoyl Tetrapeptide-7 is a lab-made peptide with anti-inflammatory and skin-repairing benefits. It's made up of four amino acids (glycine, glutamine, proline, and arginine) and palmitic acid (which helps it penetrate skin more effectively).
This ingredient helps reduce inflammation by limiting the production of interleukin-6 (IL-6), a chemical that triggers inflammatory responses, particularly after UV exposure.
Less inflammation = slower collagen breakdown and a longer-lasting, youthful appearance.
Palmitoyl Tetrapeptide-7 also stimulates collagen production and supports a healthier skin barrier.
Over time, this can improve skin firmness, hydration, and reduce the appearance of fine lines. It’s commonly paired with Palmitoyl Tripeptide-1 in the well-known Matrixyl 3000 complex for enhanced anti-aging effects.
This ingredient has been shown to be effective and safe in cosmetic use and you'll typically find it in small amounts (less than 0.01%).
Due to its palmitic acid base, it may not be safe for Malassezia folliculitis.
Read more about other common types of peptides here:
Learn more about Palmitoyl Tetrapeptide-7Palmitoyl Tripeptide-1 is also known as pal-GHK. It is made up of 3 amino acids and palmitic acid, a fatty acid that helps it absorb into skin more easily.
This peptide is as a signal peptide, meaning it tells the skin to produce more collagen. Collagen is the key protein that helps form the skin's structure and keep it plump, firm, and hydrated.
By boosting collagen production, this ingredient supports a stronger skin barrier and helps reduce the appearance of wrinkles.
You'll most likely see this ingredient paired with Palmitoyl Tetrapeptide-7 in the well-known Matrixyl 3000 complex. While results from in-house testing should be viewed cautiously, this peptide duo is among the most studied and widely used in modern skincare.
Due to its palmitic acid base, this ingredient may not be safe for Malassezia folliculitis.
Read more about other common types of peptides here:
Learn more about Palmitoyl Tripeptide-1Steareth-20 is a waxy compound used to emulsify ingredients. It is created from stearyl alcohol.
It possesses surfactant properties. This means it reduces surface tension and helps oils, dirt, and pollutants to be washed away.
The 20 stands for the number of ethylene oxide used to create this ingredient.
Learn more about Steareth-20Water. 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
Here's what our community thinks of the ingredients in these products.
When to use
Neutrogena Hydro Boost + Caffeine Eye Gel Cream 19 ingredients
Kiehl's Powerful-Strength Dark Circle Reducing Vitamin C Eye Serum 26 ingredients
