Kiehl's Powerful-Strength Dark Circle Reducing Vitamin C Eye Serum Versus IT Cosmetics Bye Bye Under Eye Brightening Eye Cream
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, peptides and Vitamin C
Suited For
They're both likely to be good for anti aging, dry skin, brightening skin, reducing pores, scar healing, dark spots and better texture
Free From
They both do not contain any common allergens, 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
Kiehl's Powerful-Strength Dark Circle Reducing Vitamin C Eye Serum 26 ingredients
IT Cosmetics Bye Bye Under Eye Brightening Eye Cream 93 ingredients
About this product
About this product
At a glance
Click on any of the items below to learn more
Kiehl's Powerful-Strength Dark Circle Reducing Vitamin C Eye Serum 26 ingredients
IT Cosmetics Bye Bye Under Eye Brightening Eye Cream 93 ingredients
Key Ingredients
Benefits
Concerns
Key Ingredients
Benefits
Concerns
Ingredients Side-by-side
Propylene Glycol
Humectant
Dimethicone
Emollient
Glycerin
Humectant
Ascorbic Acid
Antioxidant
Dimethicone Crosspolymer
Emulsion StabilisingCetyl PEG/PPG-10/1 Dimethicone
Emulsifying
Cyclohexasiloxane
Emollient
Water
Skin ConditioningHydroxyethylpiperazine Ethane Sulfonic Acid
BufferingLauroyl Lysine
Skin ConditioningAluminum Starch Octenylsuccinate
AbsorbentPolysilicone-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
Water
Skin ConditioningCyclopentasiloxane
Emollient
Butylene Glycol
Humectant
Butyrospermum Parkii Butter
Skin Conditioning
Dimethicone
Emollient
Niacinamide
Smoothing
Cetearyl Alcohol
Emollient
PEG-40 Stearate
Emulsifying
Palmitic Acid
Emollient
Stearic Acid
Cleansing
Polysorbate 60
Emulsifying
Macadamia Ternifolia Seed Oil
Emollient
Cetyl Ethylhexanoate
EmollientGlyceryl Stearate
Emollient
Glycerin
Humectant
Acrylates/C10-30 Alkyl Acrylate Crosspolymer
Emulsion StabilisingCarbomer
Emulsion StabilisingSodium Hyaluronate
Humectant
Acetyl Hexapeptide-8
Humectant
Copper Gluconate
Skin ConditioningCollagen
Moisturising
Tea-Cocoyl Glutamate
CleansingPalmitoyl Pentapeptide-4
Skin Conditioning
Copper Tripeptide-1
Skin Conditioning
Biotin
AntiseborrhoeicCaffeine
Skin ConditioningMagnesium Aspartate
Skin ConditioningZinc Gluconate
Skin Conditioning
Sodium Ascorbyl Phosphate
Antioxidant
Sodium Lauroyl Lactylate
EmulsifyingCeramide NP
Skin Conditioning
Ceramide AP
Skin Conditioning
Phytosphingosine
Skin Conditioning
Cholesterol
Emollient
Xanthan Gum
EmulsifyingCeramide EOP
Skin Conditioning
Retinol
Skin Conditioning
Tocopheryl Acetate
Antioxidant
Ascorbic Acid
Antioxidant
Aloe Barbadensis Leaf Extract
Emollient
Anthemis Nobilis Flower Extract
Masking
Curcuma Longa Root Extract
Masking
Squalane
Emollient
Spirulina Platensis Extract
Skin ProtectingAlgae Extract
Emollient
Cucumis Sativus Fruit Extract
EmollientColloidal Oatmeal
Abrasive
Propylene Glycol
Humectant
Glycyrrhiza Glabra Root Extract
Bleaching
Camellia Sinensis Leaf Extract
Antimicrobial
Lecithin
EmollientCaprylic/Capric Triglyceride
MaskingCreatine
Skin ConditioningSimmondsia Chinensis Seed Oil
Emollient
Vaccinium Angustifolium Fruit Extract
Skin ProtectingMaris Aqua
HumectantPanthenol
Skin Conditioning
Polyglutamic Acid
Skin Conditioning
Methionine
Skin ConditioningLysine
Skin ConditioningLeucine
Skin ConditioningHistidine
HumectantIsoleucine
Skin ConditioningArginine
Masking
Disodium EDTA
Polyacrylate-13
Polyisobutene
Polysorbate 20
Emulsifying
Sorbitan Isostearate
Emulsifying
Tromethamine
BufferingSorbitan Stearate
Emulsifying
Benzophenone-5
UV Absorber
Cholesteryl Nonanoate
EmollientCholesteryl Isostearate
EmollientCholesteryl Chloride
Skin ConditioningPhenylalanine
MaskingThreonine
Valine
MaskingSaccharide Isomerate
HumectantTryptophan
MaskingElaeis Guineensis Butter
EmollientSorbitol
Humectant
Polysilicone-11
Dimethicone/Vinyl Dimethicone Crosspolymer
Skin ConditioningPhenyl Trimethicone
Skin Conditioning
Citric Acid
Buffering
Alcohol
Antimicrobial
Phenoxyethanol
Preservative
Caprylyl Glycol
EmollientEthylhexylglycerin
Skin ConditioningChlorphenesin
Antimicrobial
Potassium Sorbate
Preservative
CI 42090
Cosmetic ColorantWater, Cyclopentasiloxane, Butylene Glycol, Butyrospermum Parkii Butter, Dimethicone, Niacinamide, Cetearyl Alcohol, PEG-40 Stearate, Palmitic Acid, Stearic Acid, Polysorbate 60, Macadamia Ternifolia Seed Oil, Cetyl Ethylhexanoate, Glyceryl Stearate, Glycerin, Acrylates/C10-30 Alkyl Acrylate Crosspolymer, Carbomer, Sodium Hyaluronate, Acetyl Hexapeptide-8, Copper Gluconate, Collagen, Tea-Cocoyl Glutamate, Palmitoyl Pentapeptide-4, Copper Tripeptide-1, Biotin, Caffeine, Magnesium Aspartate, Zinc Gluconate, Sodium Ascorbyl Phosphate, Sodium Lauroyl Lactylate, Ceramide NP, Ceramide AP, Phytosphingosine, Cholesterol, Xanthan Gum, Ceramide EOP, Retinol, Tocopheryl Acetate, Ascorbic Acid, Aloe Barbadensis Leaf Extract, Anthemis Nobilis Flower Extract, Curcuma Longa Root Extract, Squalane, Spirulina Platensis Extract, Algae Extract, Cucumis Sativus Fruit Extract, Colloidal Oatmeal, Propylene Glycol, Glycyrrhiza Glabra Root Extract, Camellia Sinensis Leaf Extract, Lecithin, Caprylic/Capric Triglyceride, Creatine, Simmondsia Chinensis Seed Oil, Vaccinium Angustifolium Fruit Extract, Maris Aqua, Panthenol, Polyglutamic Acid, Methionine, Lysine, Leucine, Histidine, Isoleucine, Arginine, Disodium EDTA, Polyacrylate-13, Polyisobutene, Polysorbate 20, Sorbitan Isostearate, Tromethamine, Sorbitan Stearate, Benzophenone-5, Cholesteryl Nonanoate, Cholesteryl Isostearate, Cholesteryl Chloride, Phenylalanine, Threonine, Valine, Saccharide Isomerate, Tryptophan, Elaeis Guineensis Butter, Sorbitol, Polysilicone-11, Dimethicone/Vinyl Dimethicone Crosspolymer, Phenyl Trimethicone, Citric Acid, Alcohol, Phenoxyethanol, Caprylyl Glycol, Ethylhexylglycerin, Chlorphenesin, Potassium Sorbate, CI 42090
Ingredients Explained
These ingredients are found in both products.
Ingredients higher up in an ingredient list are typically present in a larger amount.
Propylene Glycol is an odorless, colorless liquid. As a humectant, it helps skin retain moisture. It also aids in delivering active ingredients.
Another role of this ingredient is preventing a product from melting or freezing. Propylene glycol also adds antimicrobrial properties to a product, elongating product lifespan.
This ingredient is considered an organic alcohol and commonly added into both cosmetics and foods.
Those with sensitive skin or conditions may develop a rash when using this ingredient.
Learn more about Propylene GlycolDimethicone 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 GlycerinAscorbic Acid is is pure Vitamin C. This form makes up the largest amount of vitamin C found naturally in our skin.
Not only is vitamin C great for your overall health and immune system, it also has plenty of benefits on your skin.
Vitamin C is best used for brightening skin. It improves dark spots, acne scars, and hyperpigmentation. This is because it blocks the process of skin darkening when exposed to UV.
Remember: Vitamin C should not replace sunscreen!
Your skin uses vitamin C to build collagen. Collagen is one key component in having a strong skin barrier and plump skin. Vitamin C also plays a role in regulating collagen, thus making it effective in improving wrinkles and fine lines.
Ascorbic acid shows potent antioxidant activity. As an antioxidant, it helps fight free-radicals. Free-radicals are molecules that may damage your skin cells. These antioxidants also protect skin against UV damage.
The best formulations include Vitamin E and/or ferulic acid. These two ingredients help stabilize and provide a boost in the benefits of ascorbic acid. This is because ascorbic acid becomes unstable when exposed to UV and air. In fact, you can tell your ascorbic acid has oxidized when it turns an orange-yellow color.
Ascorbic acid is generally compatible with other ingredients. However, using ascorbic acid with other active ingredients might cause irritation. Two ingredients: copper ions and benzoyl peroxide, will inactivate ascorbic acid completely.
Read more about other types of Vitamin C:
Foods rich with vitamin C include oranges, strawberries, broccoli, bell peppers, and more. When consuming Vitamin C, your skin receives a portion of the nutrients.
Learn more about Ascorbic AcidWater. 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 WaterWe don't have a description for Polysilicone-11 yet.
Potassium Sorbate is a preservative used to prevent yeast and mold in products. It is commonly found in both cosmetic and food products.
This ingredient comes from potassium salt derived from sorbic acid. Sorbic acid is a natural antibiotic and effective against fungus.
Both potassium sorbate and sorbic acid can be found in baked goods, cheeses, dried meats, dried fruit, ice cream, pickles, wine, yogurt, and more.
You'll often find this ingredient used with other preservatives.
Learn more about Potassium SorbateCitric 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 AcidBiotin is a B vitamin that is naturally produced by our bodies. It is also called Vitamin H.
Our bodies use biotin in the metabolism process. It also helps our bodies use enzymes and move nutrients around. A biotin deficiency can lead to brittle hair and nails.
More research is needed on applying biotin topically. However, taking biotin orally has been shown to help nourish the skin, hair, and nails. They play a role in forming skin-hydrating fatty acids.
Biotin is water-soluble. It can be found in foods such as fish, eggs, dairy, nuts, and meat. Vitamin H stands for "haar" and "haut". These are the German words for hair and skin.
Learn more about BiotinIngredient Ratings
Here's what our community thinks of the ingredients in these products.
When to use
Kiehl's Powerful-Strength Dark Circle Reducing Vitamin C Eye Serum 26 ingredients
IT Cosmetics Bye Bye Under Eye Brightening Eye Cream 93 ingredients
