Kiehl's Nightly Refining Micro-Peel Concentrate

Kiehl's Nightly Refining Micro-Peel Concentrate
2.2
/ 10
Moisturizing
4.5 Humectancy icon Humectancy
0.0 Occlusivity icon Occlusivity

Review

Does Kiehl's Nightly Refining Micro-Peel Concentrate work?

Based on the ingredient list analysis by CreamScan AI, these are the key benefits you can expect from using Kiehl's Nightly Refining Micro-Peel Concentrate:

  • Light moisturizing. It has a moisturizing rating of 2.2 out of 10.

Basic moisturizer for oily skin

According to CreamScan analysis, Kiehl's Nightly Refining Micro-Peel Concentrate is lightly moisturizing, with a moisturizing rating of 2.2 out of 10.

Is it more humectant or occlusive? Purely humectant. It has zero occlusivity (we didn't find any occlusive ingredients on the ingredient list) and a moderate humectancy of 4.5 out of 10, primarily due to the high content of Hydroxyethyl Urea (est. ≈3.0%).

This product, when used alone as a moisturizer, can provide light humectant hydration in a fast-absorbing formula without any occlusive ingredients. This could work for people with oily skin who need a basic level of hydration.

Tip: Certain studies suggest that humectants alone may not effectively moisturize the skin. If you use this product as your only moisturizer, we recommend following it with one that contains at least some occlusive ingredients.

Since it contains a moderate amount of humectants, it can also positively contribute to the moisturizing efficacy of any skincare routine when used as a step before applying the main moisturizer.

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

Questionable anti-wrinkle efficacy

According to CreamScan analysis, Kiehl's Nightly Refining Micro-Peel Concentrate has a zero anti-wrinkle rating.

It contains Adenosine and Ascorbyl Glucoside, two ingredients often marketed as effective in reducing wrinkles. 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 generate the anti-wrinkle rating.

Moisturizers, when used regularly, are proven to prevent wrinkle formation and even reduce existing wrinkles. Therefore, this product, like any other moisturizer, can deliver some anti-wrinkle effects through its moisturizing action.

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

Ingredients

Est. % Ingredient Origin Functions
75
6
4
3
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
Est. %
Water
Function:
Origin:
Alcohol Denat.
Function:
Origin:
Hydroxyethylpiperazine Ethane Sulfonic Acid
Function:
Origin:
Hydroxyethyl Urea
Function:
Origin:
Sodium Citrate
Function:
Origin:
Vaccinium Myrtillus Fruit Extract
Function:
Origin:
Sodium Hydroxide
Function:
Origin:
Chenopodium Quinoa Seed Extract
Function:
Origin:
Saccharum Officinarum (Sugarcane) Extract
Function:
Origin:
Glycerin
Function:
Origin:
Propanediol
Function:
Origin:
Phytic Acid
Function:
Origin:
Carrageenan
Function:
Origin:
Phenoxyethanol
Function:
Origin:
Olea Europaea (Olive) Fruit Water
Function:
Origin:
Citrus Limon (Lemon) Fruit Extract
Function:
Origin:
Disodium EDTA
Function:
Origin:
Acer Saccharum (Sugar Maple) Extract
Function:
Origin:
Hydrolyzed Opuntia Ficus-Indica Flower Extract
Function:
Origin:
Potassium Sorbate
Function:
Origin:
Aloe Barbadensis Leaf Juice Powder
Function:
Origin:
Adenosine
Function:
Origin:
Ethylhexylglycerin
Function:
Origin:
Citrus Aurantium Dulcis (Orange) Peel Oil
Function:
Origin:
Sodium Benzoate
Function:
Origin:
Ascorbyl Glucoside
Function:
Origin:

Ratings

All humectants
4.5
3
0.3
0.3
0.3
0.3
0.3
Benchmark
10
All occlusives
0.0
None
Benchmark
20
Moisturizing rating
2.2
Ingredient Est. % Benchmark Raiting
Humectancy All humectants 4.5 10
4.5
3
0.3
0.3
0.3
0.3
0.3
Occlusivity All occlusives 0.0 20
0.0
None
Moisturizing rating
2.2
Ingredient Est. % Benchmark Humectancy
3
0.3
0.3
0.3
0.3
0.3
All humectants 4.5 10
4.5
All humectants
4.5
3
0.3
0.3
0.3
0.3
0.3
Benchmark
10
Ingredient Est. % Benchmark Occlusivity
None
All occlusives 0.0 20
0.0
All occlusives
0.0
None
Benchmark
20
Ingredient
Ingredient anti-wrinkle power
when present at, %
in this formula est. %
Rating
n/a
- 0.3 -
n/a
- 0.3 -
Total
0
Adenosine
-
Ingredient anti-wrinkle power
n/a
when present at, %
-
in this formula, est. %
0.3
Ascorbyl Glucoside
-
Ingredient anti-wrinkle power
n/a
when present at, %
-
in this formula, est. %
0.3
Anti-wrinkle rating
0
Ingredient Est. % Benchmark
Rich in Antioxidants
1.5
0.3
0.3
0.3
All antioxidants 2.4 3 No
All antioxidants
2.4
Vaccinium Myrtillus Fruit Extract
1.5
Saccharum Officinarum (Sugarcane) Extract
0.3
Acer Saccharum (Sugar Maple) Extract
0.3
Ascorbyl Glucoside
0.3
Benchmark
3
Ingredient Est. % Benchmark
Rich in Soothing
0.3
All soothing 0.3 5 No
All soothing
0.3
0.3
Benchmark
5

Ingredients explained

Water
Est. %75
Function
Origin
WaterThe 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.
Alcohol Denat.
Est. %6
Function
Origin
Alcohol Denat.

Denatured alcohol is ethanol that contains additives that make it unsafe to consume. It is mainly used as a solvent and an antimicrobial agent. A major drawback to alcohol denat. is that it dries out the skin.

Hydroxyethylpiperazine Ethane Sulfonic Acid
Est. %4
Function
Origin
Hydroxyethylpiperazine Ethane Sulfonic AcidA pH buffer that secures the pH around 7.5.
Hydroxyethyl Urea
Est. %3
Function
Origin
Hydroxyethyl UreaHydroxyethyl urea is a synthetic derivative of regular urea (read about it here). This ingredient, similarly to urea, is humectant moisturizing and helps to retain more water to the skin’s surface, leaving it more moisturized. There aren't any studies that analyze the effects of this ingredient in great detail.
Sodium Citrate
Est. %2
Function
Origin
Sodium CitrateA 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.
Vaccinium Myrtillus Fruit Extract
Est. %1.5
Function
Origin
Vaccinium Myrtillus Fruit ExtractAn extract derived from the berries of the bilberry plant, sometimes called European blueberry. It is rich in antioxidant anthocyanins and astringent tannins.
Sodium Hydroxide
Est. %1.3
Function
Origin
Sodium Hydroxide

An ingredient that is able to bring the pH of a product up, thereby making it less harsh on the skin.

Chenopodium Quinoa Seed Extract
Est. %1
Function
Origin
Chenopodium Quinoa Seed ExtractDerived from quinoa seeds, the extract contains various emollient phytochemicals such as phytosterols, saponins, proteins, and amino acids.
Saccharum Officinarum (Sugarcane) Extract
Est. %0.3
Function
Origin
Saccharum Officinarum (Sugarcane) ExtractAn antioxidant extract from sugarcane, the famous crop used to make sugar. It acts as a humectant and exfoliating agent – the little sugar crystals mechanically remove dead skin cells from the skin’s surface.
Glycerin
Est. %0.3
Function
Origin
Glycerin

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

Propanediol
Est. %0.3
Function
Origin
PropanediolAn excellent solvent capable of mixing water with normally water-insoluble ingredients. It also functions as a humectant due to its water-loving alcohol groups. Propanediol can control the viscosity of a product by reducing its thickness.
Phytic Acid
Est. %0.3
Function
Origin
Phytic AcidPhytic acid is found in rice and is seen as a cousin of alpha-hydroxy acids. As a chelator, it can bind to certain metals that may cause discoloration in products or reduce the efficacy of other ingredients.
Carrageenan
Est. %0.3
Function
Origin
CarrageenanA gum-like thickener derived from a species of red algae called Irish moss. It helps to form a soft film on the skin, and aids in stabilizing product forms.
Phenoxyethanol
Est. %0.3
Function
Origin
PhenoxyethanolThe 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.
Olea Europaea (Olive) Fruit Water
Est. %0.3
Function
Origin
Olea Europaea (Olive) Fruit Water
Citrus Limon (Lemon) Fruit Extract
Est. %0.3
Function
Origin
Citrus Limon (Lemon) Fruit Extract

A fragrant extract from lemon peels that contains various antioxidant flavonoids, organic acids, and limonoids – which are currently under investigation as potential anti-wrinkle and anti-pigment compounds.

Disodium EDTA
Est. %0.3
Function
Origin
Disodium EDTAA synthetic chelator that helps to maintain the look and smell of a product by 'locking up' troublesome metal ions.
Acer Saccharum (Sugar Maple) Extract
Est. %0.3
Function
Origin
Acer Saccharum (Sugar Maple) ExtractAn antioxidant extract from sugar maple bark and sap – the same sweet sap used to make maple syrup. It has a faint vanilla smell and is used in skincare for its exfoliating properties. This is because of the small sugar crystals present in the extract.
Hydrolyzed Opuntia Ficus-Indica Flower Extract
Est. %0.3
Function
Origin
Hydrolyzed Opuntia Ficus-Indica Flower Extract
Potassium Sorbate
Est. %0.3
Function
Origin
Potassium SorbateA 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.
Aloe Barbadensis Leaf Juice Powder
Est. %0.3
Function
Origin
Aloe Barbadensis Leaf Juice PowderExtracted from dried aloe vera leaves, it has the same effects as fresh aloe vera juice – it is humectant moisturizing, refreshing, and soothing. This powder can also serve as a gelling agent when mixed with water.
Adenosine
Est. %0.3
Function
Origin
Adenosine

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.

Ethylhexylglycerin
Est. %0.3
Function
Origin
EthylhexylglycerinA 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.
Citrus Aurantium Dulcis (Orange) Peel Oil
Est. %0.3
Function
Origin
Citrus Aurantium Dulcis (Orange) Peel Oil

An essential oil derived from the peels of the sweet orange. It is commonly used as a fragrance because of its pleasant, citrusy scent. The main constituent of the essential oil is limonene (up to 96%).

Sodium Benzoate
Est. %0.3
Function
Origin
Sodium BenzoateA preservative that usually works in combination with other preservatives. It has to be at low pH (<5.5) to be effective.
Ascorbyl Glucoside
Est. %0.3
Function
Origin
Ascorbyl GlucosideA 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.