Kirei Products Skin Tightening Serum Review

Kirei Products Skin Tightening Serum
5.1
/ 10
Moisturizing
9.7 Humectancy icon Humectancy
0.6 Occlusivity icon Occlusivity
Review

Does Kirei Products Skin Tightening Serum Work?

 
According to CreamScan AI's analysis of the ingredient list, here’s what Kirei Products Skin Tightening Serum has to offer:
 
  • Strong humectant moisturizing. This lightweight, humectant-rich product, ideal for oily skin, has a moisturizing rating of 5.1 out of 10.

Key Benefits of Kirei Products Skin Tightening Serum

 
These are the key benefits you can expect from using Kirei Products Skin Tightening Serum:
 

Lightweight Humectant Moisturizer Ideal for Oily Skin

According to CreamScan analysis, Kirei Products Skin Tightening Serum is quite moisturizing, with a moisturizing rating of 5.1 out of 10.

Is it more humectant or occlusive? Significantly more humectant. It has a low occlusivity of 0.6 out of 10 and a very high humectancy of 9.7 out of 10, primarily due to the high content of Butylene Glycol (est. ≈4.0%) and Glycerin (est. ≈3.0%).

This humectant-rich product, when used alone as a moisturizer, is ideal for oily skin, offering significant hydration in a lightweight, fast-absorbing formula with a minimal amount of occlusive ingredients.

It’s also a great choice for people with normal skin who prefer lightweight moisturizers.

A Humectant Boost for Any Skincare Routine

But it’s not limited to oily skin - such a humectant boost will also positively contribute to the moisturizing efficacy of any skincare routine when used as a step before applying the main moisturizer. This type of formulation is typically used in serums, where a light, fast-absorbing texture is key.

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

Please note that this is not a complete list of benefits. We are in the process of enhancing our AI model to incorporate anti-pigmentation, exfoliation and anti-acne ratings.

Things to Be Aware Of: Kirei Products Skin Tightening Serum

 
CreamScan AI identified a few things to consider before adding Kirei Products Skin Tightening Serum to your skincare routine:
 

Questionable anti-wrinkle efficacy

If one of your main reasons for choosing Kirei Products Skin Tightening Serum is its potential anti-aging effects, please note that, according to CreamScan analysis, it currently has a zero anti-wrinkle rating.

It contains Caprooyl Tetrapeptide-3, an ingredient often marketed as effective in reducing wrinkles. However, the studies supporting the anti-wrinkle claims of Caprooyl Tetrapeptide-3 provide insufficient evidence of its efficacy according to CreamScan Research Evaluation Standards.

While this does not categorically exclude the possibility that Caprooyl Tetrapeptide-3 may reduce wrinkles, its efficacy is not supported by convincing, vehicle-controlled, double-blind clinical studies - at least none that were accessible to the CreamScan team at the time of publication.

Therefore, this ingredient does 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.

Pros & Cons of Kirei Products Skin Tightening Serum

 
Here’s an overview of the pros and cons of Kirei Products Skin Tightening Serum to help you decide if it’s the right choice for your skincare routine:
 

Pros:

  • When used alone: Provides humectant-rich moisturizing ideal for oily skin
  • As part of a routine: A humectant moisturizing boost, beneficial for any skin type
  • Lightweight texture

Cons: 

  • Questionable anti-wrinkle efficacy

Ingredients

Est. % Ingredient Origin Functions
70
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
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:
Cyclopentasiloxane
Function:
Origin:
Butylene Glycol
Function:
Origin:
Glycerin
Function:
Origin:
Isotridecyl Isononanoate
Function:
Origin:
Trimethylsiloxyphenyl Dimethicone
Function:
Origin:
Isostearic Acid
Function:
Origin:
Caprylic/Capric Triglyceride
Function:
Origin:
Propanediol
Function:
Origin:
PEG-9 Polydimethylsiloxyethyl Dimethicone
Function:
Origin:
PEG-Crosspolymer
Function:
Origin:
Inulin
Function:
Origin:
Medicago Sativa (Alfalfa) Extract
Function:
Origin:
Avena Sativa (Oat) Kernel Extract
Function:
Origin:
Polyglutamic Acid
Function:
Origin:
Dipotassium Glycyrrhizate
Function:
Origin:
Mannose
Function:
Origin:
Sodium Mannose Phosphate
Function:
Origin:
Caprooyl Tetrapeptide-3
Function:
Origin:
Xanthan Gum Crosspolymer
Function:
Origin:
Sodium Bicarbonate
Function:
Origin:
Hydroxyethylcellulose
Function:
Origin:
Pentylene Glycol
Function:
Origin:
PEG-10 Dimethicone
Function:
Origin:
Cetyl PEG/PPG-10/1 Dimethicone
Function:
Origin:
Hydrogen Dimethicone
Function:
Origin:
Dimethicone
Function:
Origin:
PEG-5 Glyceryl Trioleate
Function:
Origin:
Zinc Sulfate
Function:
Origin:
Fragrance
Function:
Origin:
Dextran
Function:
Origin:
Ethylhexylglycerin
Function:
Origin:
Phenoxyethanol
Function:
Origin:
Methylparaben
Function:
Origin:
Titanium Dioxide (CI 77891)
Function:
Origin:
Zinc Oxide
Function:
Origin:
Aluminum Hydroxide
Function:
Origin:
Mica
Function:
Origin:

Ratings

All humectants
9.7
4
3
0.3
0.3
0.3
0.3
0.3
0.3
0.3
0.3
0.3
Benchmark
10
All occlusives
1.3
1.0
0.3
Benchmark
20
Moisturizing rating
5.1
Ingredient Est. % Benchmark Raiting
Humectancy All humectants 9.7 10
9.7
4
3
0.3
0.3
0.3
0.3
0.3
0.3
0.3
0.3
0.3
Occlusivity All occlusives 1.3 20
0.6
1.0
0.3
Moisturizing rating
5.1
Ingredient Est. % Benchmark Humectancy
4
3
0.3
0.3
0.3
0.3
0.3
0.3
0.3
0.3
0.3
All humectants 9.7 10
9.7
All humectants
9.7
4
3
0.3
0.3
0.3
0.3
0.3
0.3
0.3
0.3
0.3
Benchmark
10
Ingredient Est. % Benchmark Occlusivity
1
0.3
All occlusives 1.3 20
0.6
All occlusives
1.3
1.0
0.3
Benchmark
20
Ingredient
Ingredient anti-wrinkle power
when present at, %
in this formula est. %
Rating
n/a
- 0.3 -
Total
0
Caprooyl Tetrapeptide-3
-
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
0.3
0.3
All antioxidants 0.6 3 No
All antioxidants
0.6
Medicago Sativa (Alfalfa) Extract
0.3
Avena Sativa (Oat) Kernel Extract
0.3
Benchmark
3
Ingredient Est. % Benchmark
Rich in Soothing
0.3
0.3
All soothing 0.6 5 No
All soothing
0.6
0.3
0.3
Benchmark
5

Ingredients explained

Water
Est. %70
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.
Cyclopentasiloxane
Est. %6
Function
Origin
CyclopentasiloxaneA lightweight, fast-spreading emollient that leaves a very soft and silky after-feel on the skin. Supplied as a clear and colorless liquid, cyclopentasiloxane is often used as a solvent to dissolve other silicones in.
Butylene Glycol
Est. %4
Function
Origin
Butylene Glycol

A clear, colorless liquid humectant that draws moisture to the skin. The humectancy of butylene glycol, owed to its two hydroxyl groups, is quite considerable, although not as powerful as glycerin, which contains three hydroxyl groups.

Glycerin
Est. %3
Function
Origin
Glycerin

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

Isotridecyl Isononanoate
Est. %2
Function
Origin
Isotridecyl Isononanoate
Trimethylsiloxyphenyl Dimethicone
Est. %1.5
Function
Origin
Trimethylsiloxyphenyl Dimethicone
Isostearic Acid
Est. %1.3
Function
Origin
Isostearic AcidA saturated fatty acid used to mix oil and water and to remove dirt from the skin's surface. Isostearic acid is listed among common comedogenic ingredients by acne.org.
Caprylic/Capric Triglyceride
Est. %1
Function
Origin
Caprylic/Capric TriglycerideA natural occlusive moisturizing and emollient ingredient, it is a blend of glycerin and two fatty acids, caprylic and capric acid. It creates an oil-based protective layer on the skin, thereby preventing water loss.
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.
PEG-9 Polydimethylsiloxyethyl Dimethicone
Est. %0.3
Function
Origin
PEG-9 Polydimethylsiloxyethyl Dimethicone
PEG-Crosspolymer
Est. %0.3
Function
Origin
PEG-Crosspolymer
Inulin
Est. %0.3
Function
Origin
InulinA naturally occurring polysaccharide that works as a humectant moisturizing ingredient.
Medicago Sativa (Alfalfa) Extract
Est. %0.3
Function
Origin
Medicago Sativa (Alfalfa) ExtractA fragrant extract with a hay-like scent derived from the alfalfa plant. It contains various antioxidant compounds such as flavonoids and saponins.
Avena Sativa (Oat) Kernel Extract
Est. %0.3
Function
Origin
Avena Sativa (Oat) Kernel ExtractA beneficial extract obtained from Oat groats popular in products aimed at eczema-prone skin. It contains skin healing beta-glucan, anti-inflammatory phenolic compounds, antioxidant flavonoids, various lipids, proteins, and moisturizing amino acids.
Polyglutamic Acid
Est. %0.3
Function
Origin
Polyglutamic AcidA natural polymer with incredible water-binding properties that is prepared from glutamic acid through fermentation.
Dipotassium Glycyrrhizate
Est. %0.3
Function
Origin
Dipotassium GlycyrrhizateA licorice root derivative with powerful anti-inflammatory and soothing activities. It is often used as a flavoring agent in lip products.
Mannose
Est. %0.3
Function
Origin
Mannose
Sodium Mannose Phosphate
Est. %0.3
Function
Origin
Sodium Mannose Phosphate
Caprooyl Tetrapeptide-3
Est. %0.3
Function
Origin
Caprooyl Tetrapeptide-3

A synthetically made peptide that was designed to emulate the skin growth factor. It is said to boost the production of the skin's structural elements and the dermo-epidermal junction, although this has not been independently tested.

Xanthan Gum Crosspolymer
Est. %0.3
Function
Origin
Xanthan Gum Crosspolymer
Sodium Bicarbonate
Est. %0.3
Function
Origin
Sodium BicarbonateA sodium salt that increases pH and removes dead skin cells.
Hydroxyethylcellulose
Est. %0.3
Function
Origin
HydroxyethylcelluloseA naturally-derived thickener that can form clear gel textures without the slimy feeling, unlike some other natural gel-formers.
Pentylene Glycol
Est. %0.3
Function
Origin
Pentylene Glycol

A naturally or synthetically derived preservative that exhibits effective antifungal and antibacterial traits. It also acts as a booster for more traditional preservatives. Pentylene glycol can also serve as a moisturizing humectant and solvent.

PEG-10 Dimethicone
Est. %0.3
Function
Origin
PEG-10 DimethiconeA 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.
Cetyl PEG/PPG-10/1 Dimethicone
Est. %0.3
Function
Origin
Cetyl PEG/PPG-10/1 DimethiconeA silicone-based powerful emulsifier that helps to create lightweight and pleasant feeling lotions and creams.
Hydrogen Dimethicone
Est. %0.3
Function
Origin
Hydrogen Dimethicone
Dimethicone
Est. %0.3
Function
Origin
DimethiconeThe 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.
PEG-5 Glyceryl Trioleate
Est. %0.3
Function
Origin
PEG-5 Glyceryl Trioleate
Zinc Sulfate
Est. %0.3
Function
Origin
Zinc Sulfate
Fragrance
Est. %0.3
Function
Origin
FragranceUnder trade secret law, manufacturers have the right not to disclose what exactly went into the fragrance and use the unspecific word Fragrance or Parfum instead. Many fragrances are highly allergenic.
Dextran
Est. %0.3
Function
Origin
DextranA naturally derived sucrose metabolite that thickens water and bulks emulsions.
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.
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.
Methylparaben
Est. %0.3
Function
Origin
MethylparabenA preservative that keeps a product unspoiled. There has been a lot of controversy surrounding parabens, although the concentrations found in cosmetic formulations are generally considered to be safe.
Titanium Dioxide (CI 77891)
Est. %0.3
Function
Origin
Titanium Dioxide (CI 77891)One of two the most commonly used mineral sunscreens. It can absorb UV light, including UVB – which causes burning, tanning, and even skin cancer. Also used as a colorant, titanium dioxide gives a product a bright white color.
Zinc Oxide
Est. %0.3
Function
Origin
Zinc OxideA white mineral powder mainly used in skincare as a physical sunscreen. It protects against UVA light that leads to visible signs of aging, including wrinkles and fine lines. Zinc oxide can also be used as a colorant to enhance the whiteness of a product.
Aluminum Hydroxide
Est. %0.3
Function
Origin
Aluminum HydroxideA white mineral powder, also known as alumina, that is derived from aluminum metal. It is frequently used as an abrasive in exfoliating products and as a thickener. Aluminum oxide is also a great opacifier.
Mica
Est. %0.3
Function
Origin
MicaA mineral powder made up of silicates with several functions (the main one being as a colorant). It has a shimmery appearance, making it highly desirable in certain cosmetic products. Mica also helps the product to apply more smoothly.