Kiehl's Eye Fuel

Kiehl's Eye Fuel
7.3
/ 10
Moisturizing
10.0 Humectancy icon Humectancy
4.6 Occlusivity icon Occlusivity
6Anti-wrinkle icon/ 10
Anti-wrinkle
Rich
in Antioxidants
$$$$

Review

Results you may expect from using Kiehl's Eye Fuel:

Based on the ingredient analysis by CreamScan, these are the key benefits you can expect from using Kiehl's Eye Fuel:

  • Significant moisturizing. It has a moisturizing rating of 7.3 out of 10.
  • Significant anti-wrinkle efficacy. With an anti-wrinkle rating of 6.0 out of 10, Kiehl's Eye Fuel is effective in minimizing wrinkles.
  • Antioxidant protection.

How moisturizing is it?

Highly moisturizing: Kiehl's Eye Fuel has a moisturizing rating of 7.3 out of 10.

Is it more humectant or occlusive? Significantly more humectant. It has a maximum humectancy of 10 out of 10, primarily due to the substantial concentration of Glycerin (est. ≈6.0%) and Niacinamide (est. ≈4.0%), and a moderate occlusivity of 4.6 out of 10, mainly due to the high content of Dimethicone (est. ≈9.0%).

Please refer to the Ratings section below for details of the moisturizing rating calculation.

Anti-wrinkle efficacy

According to CreamScan analysis, Kiehl's Eye Fuel has a high anti-wrinkle rating of 6.0 out of 10. It contains one ingredient with proven anti-wrinkle efficacy: Niacinamide (est. ≈4.0%),
 one of the most effective and well-researched anti-wrinkle ingredients.
 
Among others, Kiehl's Eye Fuel also contains some ingredients marketed as effective in reducing wrinkles, specifically Caffeine, Ascorbyl Glucoside, Adenosine, Palmitoyl Oligopeptide, and Palmitoyl Tetrapeptide-7. However, the studies supporting the anti-wrinkle claims of these ingredients provide insufficient evidence of efficacy according to CreamScan Research Evaluation Standards. Therefore, these ingredients do not contribute to the anti-wrinkle rating.
 

Please refer to the Ratings section below for details of the anti-wrinkle rating calculation.

Antioxidant benefits

We estimate that Kiehl's Eye Fuel is rich (> 3%) in antioxidants, specifically Niacinamide (est. ≈4.0%) and Caffeine (est. ≈2.5%).

A key benefit of antioxidants is their ability to reduce oxidative stress caused by free radicals and therefore prevent accelerated skin aging. Studies also show that antioxidants can protect against environmental damage such as UV radiation and pollution, and help reduce inflammation and skin redness.

Ingredients

Est. % Ingredient Origin Functions
65
9
6
4
3
2.5
2
1.5
1.3
1
0.3
0.3
0.3
0.3
0.3
0.3
0.3
0.3
0.3
0.3
0.3
0.3
0.3
0.3
0.3
0.3
0.3
0.3
0.3
0.3
0.3
0.3
0.3
0.3
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Ratings

All humectants
10.6
6
4
0.3
0.3
Benchmark
10
All occlusives
9.3
9.0
0.3
Benchmark
20
Moisturizing rating
7.3
Ingredient Est. % Benchmark Raiting
Humectancy All humectants 10.6 10
10.0
6
4
0.3
0.3
Occlusivity All occlusives 9.3 20
4.6
9.0
0.3
Moisturizing rating
7.3
Ingredient Est. % Benchmark Humectancy
6
4
0.3
0.3
All humectants 10.6 10
10
All humectants
10.6
6
4
0.3
0.3
Benchmark
10
Ingredient Est. % Benchmark Occlusivity
9
0.3
All occlusives 9.3 20
4.6
All occlusives
9.3
9.0
0.3
Benchmark
20
Ingredient
Ingredient anti-wrinkle power
when present at, %
in this formula est. %
Rating
6 /10 4 4 6
n/a
- 2.5 -
n/a
- 0.3 -
n/a
- 0.3 -
n/a
- 0.3 -
n/a
- 0.3 -
Total
6
Niacinamide
6
Ingredient anti-wrinkle power
6 /10
when present at, %
4
in this formula, est. %
4
Caffeine
-
Ingredient anti-wrinkle power
n/a
when present at, %
-
in this formula, est. %
2.5
Ascorbyl Glucoside
-
Ingredient anti-wrinkle power
n/a
when present at, %
-
in this formula, est. %
0.3
Adenosine
-
Ingredient anti-wrinkle power
n/a
when present at, %
-
in this formula, est. %
0.3
Palmitoyl Oligopeptide
-
Ingredient anti-wrinkle power
n/a
when present at, %
-
in this formula, est. %
0.3
Palmitoyl Tetrapeptide-7
-
Ingredient anti-wrinkle power
n/a
when present at, %
-
in this formula, est. %
0.3
Anti-wrinkle rating
6
Ingredient Est. % Benchmark
Rich in Antioxidants
4
2.5
0.3
0.3
0.3
All antioxidants 7.4 3 Rich in antioxidants
All antioxidants
7.4
Niacinamide
4
Caffeine
2.5
p-Anisic Acid
0.3
Tocopherol
0.3
Ascorbyl Glucoside
0.3
Benchmark
3
Ingredient Est. % Benchmark
Rich in Soothing
4
0.3
0.3
All soothing 4.6 5 No
All soothing
4.6
4
0.3
0.3
Benchmark
5

Ingredients explained

Water
Est. %65
Function
Origin
The most used ingredient in skincare. Its concentration defines the product texture: rich creams may have about 50% of water while a light jelly about 90%. Water doesn’t moisturize the skin by itself and is used in skincare as a solvent for other ingredients.
Dimethicone
Est. %9
Function
Origin
The most common silicone in skincare. It forms a silky, smooth film on the skin’s surface and can help to prevent water loss. It also aids in wound healing and can treat and soften scars. Dimethicone is considered to be very safe for use.
Glycerin
Est. %6
Function
Origin

The most popular moisturizing ingredient in the world. It is a powerful humectant – cheap yet very effective.

Niacinamide
Est. %4
Function
Origin

Also known as vitamin B3, this ingredient is a true superstar with confirmed moisturizing, anti-acne, hyperpigmentation, and antioxidant benefits. Two studies confirm its significant anti-wrinkle efficacy.

Methyl Methacrylate Crosspolymer
Est. %3
Function
Origin
A synthetic ingredient that is used for bulking, film-forming, and controlling viscosity. It can absorb large amounts of water and oil and creates a network for other ingredients to live in.
Caffeine
Est. %2.5
Function
Origin
An antioxidant compound that is obtained from coffee and tea leaves. It increases the microcirculation of blood in the skin and is claimed to be able to reduce the appearance of orange peel skin (although the research is lacking).
Ethylhexyl Palmitate
Est. %2
Function
Origin
A rich emollient without the oily after-feel, making it a popular replacement for mineral oil. It is derived from natural sources such as palm oil and palm kernel oil. Ethylhexyl palmitate is listed as a common comedogenic ingredient by acne.org.
Dimethicone/Vinyl Dimethicone Crosspolymer
Est. %1.5
Function
Origin
This ingredient can refer to several kinds of dimethicone crosspolymers. Like other silicones, it makes products feel slippery and non-greasy but can also increase the thickness or improve the water-resistance of a formula.
Dimethicone/PEG-10/15 Crosspolymer
Est. %1.3
Function
Origin
A self-emulsifying surfactant, which means that it can help facilitate the formation of water-in-silicone emulsions. This results in lightweight formulas with a soft finish. It can also act as a film-former and thickener.
PEG-10 Dimethicone
Est. %1
Function
Origin
A polyethylene-based emulsifying ingredient. It has a water-loving portion and an oil-loving portion that help to keep the water and oil phases connected to form an emulsion.
Hydroxyethylpiperazine Ethane Sulfonic Acid
Est. %0.3
Function
Origin
A pH buffer that secures the pH around 7.5.
Sodium Chloride
Est. %0.3
Function
Origin
You’re definitely familiar with sodium chloride, even if you don’t think you are. It’s table salt! Salt works well with some cleansing ingredients (surfactants) to thicken them into gels. It also acts as a stabilizer for water-in-oil emulsions.
Perlite
Est. %0.3
Function
Origin
Description is coming soon
Phenoxyethanol
Est. %0.3
Function
Origin
The most frequently used preservative in skincare. It is a clear, oil-like liquid synthetic substance that protects products from harmful bacteria and yeast, whilst still leaving skin microflora unharmed. It is confirmed by research to be harmless.
Chlorphenesin
Est. %0.3
Function
Origin
A preservative and broad-spectrum antimicrobial agent that protects products from a wide range of bacteria and fungi.
Sodium Citrate
Est. %0.3
Function
Origin
A salt of citric acid that has a salty and tart flavor and is used as a fragrance. It is mildly basic, meaning that its addition to a skincare product can adjust the pH upward.
p-Anisic Acid
Est. %0.3
Function
Origin
A simple phenolic acid with antioxidant and antimicrobial properties that is used as a preservative. It has a faint, sweet aroma and can be found in anise, fennel, and cocoa seeds.
Tocopherol
Est. %0.3
Function
Origin
Simply another name for vitamin E. Tocopherol is a fantastic ingredient and especially beneficial for dry and inflamed skin. It has occlusive moisturizing, emollient, antioxidant, and photoprotective properties.
Disodium EDTA
Est. %0.3
Function
Origin
A synthetic chelator that helps to maintain the look and smell of a product by 'locking up' troublesome metal ions.
Steareth-20
Est. %0.3
Function
Origin
A white to light brown reaction product of a clear gas and stearyl alcohol. Like the other steareth ingredients, steareth-20 is a waxy emulsifier that can help to form a stable emulsion, even in extreme conditions.
Ascorbyl Glucoside
Est. %0.3
Function
Origin
A derivative of vitamin C. It is more stable and less irritating than ascorbic acid. There are unfortunately no clinical studies on ascorbyl glucoside’s anti-pigment or anti-acne efficacy alone.
Adenosine
Est. %0.3
Function
Origin

A key molecule responsible for energy transportation, signaling, and enzyme activity. Adenosine is a popular anti-wrinkle ingredient, however, the key study about its anti-wrinkle efficacy (1) does not meet CreamScan Research Evaluation Standards as it is not double-blind.

Glycine Soja (Soybean) Protein
Est. %0.3
Function
Origin
An emulsifying mixture of proteins extracted from soybeans. It has some soothing properties (e.g., it can help with the healing of sunburned skin) and contains various proteins, enzymes, and amino acids.
Dipropylene Glycol
Est. %0.3
Function
Origin
A clear, colorless liquid that has several uses. One of its main functions is as a solvent. Dipropylene glycol is also used to reduce the thickness of skincare products.
Caprylyl Glycol
Est. %0.3
Function
Origin
An emollient that improves product spreadability and offers a silky feel on the skin. It also acts as a preservative booster that improves the efficacy of other preservatives. According to the manufacturer, it is also a humectant moisturizer.
Sodium Cocoyl Glutamate
Est. %0.3
Function
Origin
A very effective yet mild cleansing ingredient derived from coconut oil.
Chlorhexidine Digluconate
Est. %0.3
Function
Origin
A synthetic antimicrobial ingredient used to deal with bacterial and fungal skin infections. In the same way that it wipes out bacteria from the skin, it can also fight them inside cosmetic products, acting as a preservative.
N-Hydroxysuccinimide
Est. %0.3
Function
Origin
N-Hydroxysuccinimide is thought to reduce the appearance of dark circles under the eyes. However, more research is needed to confirm if this ingredient is truly effective in this manner.
Potassium Sorbate
Est. %0.3
Function
Origin
A preservative widely used in food and personal care products, available from natural sources or synthetically produced. Potassium sorbate works by inhibiting the growth of yeasts, molds, and some bacteria.
Ethylhexylglycerin
Est. %0.3
Function
Origin
A preservative booster derived from glycerin. It is commonly paired with other preservatives to improve their efficacy. Ethylhexylglycerin is also a humectant due to its chemical base of glycerin.
Sodium Benzoate
Est. %0.3
Function
Origin
A preservative that usually works in combination with other preservatives. It has to be at low pH (<5.5) to be effective.
Palmitoyl Oligopeptide
Est. %0.3
Function
Origin

This is an old INCI name that can refer to several other peptides. They are all short fragments of collagen or elastin and function as signal molecules, telling the skin to repair and restructure the dermis, resulting in anti-wrinkle activity.

Chrysin
Est. %0.3
Function
Origin
Chrysin is thought to help promote blood circulation in blends with other ingredients and allegedly can help to reduce the appearance of dark under-eye circles. However, no official studies have been done to confirm this.
Palmitoyl Tetrapeptide-7
Est. %0.3
Function
Origin

A synthetic peptide that mimics the activity of immunoglobulin G and signals to the skin to stop the inflammation. It has been shown in studies to reduce wrinkles and enhance collagen content.