Kiehl's Powerful-Strength Dark Circle Reducing Vitamin C Eye Serum Versus ISDIN K-Ox Eyes
Overview
What they are
These products are both reef safe eye moisturizers. They have a total of 15 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 harsh alcohols, common allergens, oils or parabens
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
ISDIN K-Ox Eyes 35 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
ISDIN K-Ox Eyes 35 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 ConditioningGlycerin
Humectant
Isohexadecane
EmollientIsopropyl Myristate
Emollient
PPG-15 Stearyl Ether
EmollientPEG-30 Dipolyhydroxystearate
Emulsifying
Phytonadione Epoxide
AstringentMagnesium Sulfate
Phenoxyethanol
Preservative
Parfum
Masking
Cera Microcristallina
Emulsion Stabilising
CI 77891
Cosmetic ColorantSodium Dextran Sulfate
Gel Forming
Acrylates/C12-22 Alkyl Methacrylate Copolymer
Steareth-20
CleansingHesperidin Methyl Chalcone
Antioxidant
Disodium EDTA
Hydrolyzed Hyaluronic Acid
Humectant
Ethylhexylglycerin
Skin ConditioningPEG-8
HumectantPentylene Glycol
Skin ConditioningTocopherol
Antioxidant
Chlorhexidine Digluconate
Antimicrobial
N-Hydroxysuccinimide
Skin ConditioningBHT
Antioxidant
Potassium Sorbate
Preservative
Dipeptide-2
Skin Conditioning
Ascorbyl Palmitate
Antioxidant
Palmitoyl Tetrapeptide-7
Skin Conditioning
Citric Acid
Buffering
Ascorbic Acid
Antioxidant
Chrysin
Skin ConditioningPalmitoyl Tripeptide-1
Skin Conditioning
Sodium Citrate
BufferingBiotin
AntiseborrhoeicWater, Glycerin, Isohexadecane, Isopropyl Myristate, PPG-15 Stearyl Ether, PEG-30 Dipolyhydroxystearate, Phytonadione Epoxide, Magnesium Sulfate, Phenoxyethanol, Parfum, Cera Microcristallina, CI 77891, Sodium Dextran Sulfate, Acrylates/C12-22 Alkyl Methacrylate Copolymer, Steareth-20, Hesperidin Methyl Chalcone, Disodium EDTA, Hydrolyzed Hyaluronic Acid, Ethylhexylglycerin, PEG-8, Pentylene Glycol, Tocopherol, Chlorhexidine Digluconate, N-Hydroxysuccinimide, BHT, Potassium Sorbate, Dipeptide-2, Ascorbyl Palmitate, Palmitoyl Tetrapeptide-7, Citric Acid, Ascorbic Acid, Chrysin, Palmitoyl Tripeptide-1, Sodium Citrate, Biotin
Ingredients Explained
These ingredients are found in both products.
Ingredients higher up in an ingredient list are typically present in a larger amount.
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 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 WaterCi 77891 is a white pigment from Titanium dioxide. It is naturally found in minerals such as rutile and ilmenite.
It's main function is to add a white color to cosmetics. It can also be mixed with other colors to create different shades.
Ci 77891 is commonly found in sunscreens due to its ability to block UV rays.
Learn more about CI 77891Hydrolyzed Hyaluronic Acid is a form of hyaluronic acid. It is created by the hydrolysis of hyaluronic acid with a high molecular weight. Once created, Hydrolyzed Hyaluronic Acid has a low molecular weight.
Low molecular weight HA has been shown to hydrate and increase elasticity of the skin. Increasing elasticity is also associated with reduction of wrinkle depth.
One study found topical low molecular weight hyaluronic acid may be considered for the treatment of rosacea in the adult population. However, we always recommend speaking with a professional about your skin concerns.
Hyaluronic acids are a humectant. This means they draw moisture from the air. Hyaluronic acids help moisturize, soothe, and protect the skin.
Read more about other common forms of hyaluronic acid:
Learn more about Hydrolyzed Hyaluronic AcidSteareth-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-20Chlorhexidine Digluconate is a preservative.
We don't have a description for N-Hydroxysuccinimide yet.
Sodium Citrate is the sodium salts of citric acid. In skincare, it is used to alter pH levels and acts as a preservative.
Its main functions are to maintain the pH of a product and neutralize metal ions.
The acidity of our skin is maintained by our glands and skin biome; normal pH level of skin is slightly acidic (~4.75-5.5).
Being slightly acidic allows our skin to create an "acid mantle". This acid mantle is a thin barrier that protects our skin from bacteria and contaminants.
Learn more about Sodium CitratePotassium 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 SorbatePalmitoyl Tripeptide-1 is a 3-amino acid peptide. Peptides are building blocks for protein.
This ingredient is a signal peptide, meaning it tells our skin to create collagen. Collagen is a protein that makes connective tissue. Boosting collagen production leads to a healthier skin barrier. Having a healthy skin barrier means having firm and hydrated skin.
Palmitoyl Tripeptide-1 can help reduce wrinkles and make the skin look more youthful.
Read more about other common types of peptides here:
Learn more about Palmitoyl Tripeptide-1We don't have a description for Chrysin yet.
Palmitoyl Tetrapeptide-7 is a peptide. Peptides are building blocks for protein.
This ingredient consists of four amino acids and palmitic acid. These amino acids are arginine, proline, glutamine, and glycine.
This ingredient has many benefits. These benefits include boosting collagen production, fighting inflammation, and reversing UV damage.
By preventing our bodies from producing interleukins, Palmitoyl Tetrapeptide-7 helps fight inflammation. An interleukin is a chemical that signals to the body to produce an inflammatory response. Interleukin production is accelerated by UV radiation.
Palmitoyl Tetrapeptide-7 tells our body to create more collagen. Collagen is a protein that makes connective tissue. Boosting collagen production leads to a healthier skin barrier. Having a healthy skin barrier means having firm and hydrated skin.
Read more about other common types of peptides here:
Learn more about Palmitoyl Tetrapeptide-7Citric 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
ISDIN K-Ox Eyes 35 ingredients
Reviews
Here's what our community thinks
Kiehl's Powerful-Strength Dark Circle Reducing Vitamin C Eye Serum 26 ingredients
ISDIN K-Ox Eyes 35 ingredients
Used it for over a year, but didn't see any results with regard to fine lines. It has a nice applicator and is both very hydrating & moisturizing. However, the fragrance is a bit too strong and it would occasionally irritate my eyes. I'd rate it 3.5 stars just because it is very hydrating (unfortunately, no halves on SkinSort).
I bought this in hopes of improving dark under eye circles. used this exclusively on one eye for a month to test and saw zero difference between the two eyes besides one being more moisturized. But no impact on dark circles. I am now using it on both eyes just to use it up but I won’t repurchase. Price too high for lack of results and scent is too strong
