Dear, Klairs Fundamental Watery Oil Drop Review

Dear, Klairs Fundamental Watery Oil Drop
5.0
/ 10
Moisturizing
10.0 Humectancy icon Humectancy
0.0 Occlusivity icon Occlusivity
Review

Does Dear, Klairs Fundamental Watery Oil Drop Work?

 
According to CreamScan AI's analysis of the ingredient list, here’s what Dear, Klairs Fundamental Watery Oil Drop has to offer:
 
  • Strong humectant moisturizing. This lightweight, humectant-rich product, ideal for oily skin, has a moisturizing rating of 5.0 out of 10.

Key Benefits of Dear, Klairs Fundamental Watery Oil Drop

 
These are the key benefits you can expect from using Dear, Klairs Fundamental Watery Oil Drop:
 

Lightweight Purely Humectant Moisturizing, Ideal for Oily Skin

According to CreamScan analysis, Dear, Klairs Fundamental Watery Oil Drop is quite moisturizing, with a moisturizing rating of 5.0 out of 10.

Is it more humectant or occlusive? It is purely humectant. It has zero occlusivity (we didn't find any occlusive ingredients on the ingredient list) and a maximum humectancy of 10 out of 10, primarily due to the high content of Glycerin (est. ≈6.0%), Butylene Glycol (est. ≈4.0%) and Bifida Ferment Extract (est. ≈2.0%).

This humectant-rich product, when used alone as a moisturizer, is ideal for oily skin, providing significant hydration in a lightweight, fast-absorbing formula without any occlusive ingredients.

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.

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: Dear, Klairs Fundamental Watery Oil Drop

 
CreamScan AI identified a few things to consider before adding Dear, Klairs Fundamental Watery Oil Drop to your skincare routine:
 

If It’s Your Only Moisturizer, It Needs to Be Paired with Some Occlusives

While humectants are highly effective at attracting water to the skin, studies (J. N. Kraft, C. W. Lynde) suggest they may not be efficient when used alone.

One major drawback of purely humectant moisturization is that the water attracted by humectants to the upper layers of the skin can evaporate completely into the environment through transepidermal water loss (TEWL). Adding occlusive ingredients helps seal this moisture into the skin and prevent further water loss.

If you’re using Dear, Klairs Fundamental Watery Oil Drop as your only moisturizer, consider pairing it with one that contains at least some occlusive ingredients, such as oils, butters, or silicones. These work alongside humectants to create a protective barrier, locking in hydration and ensuring longer-lasting moisturization. The amount of occlusive needed depends on your skin type - the drier the skin, the more occlusives it requires.

If this product is used not as a standalone moisturizer but as part of your skincare routine, such as a toner or serum, it should be applied before your main moisturizer (unless it's a sunscreen), which will provide the necessary occlusivity on top of it.

Questionable anti-wrinkle efficacy

If one of your main reasons for choosing Dear, Klairs Fundamental Watery Oil Drop is its potential anti-aging effects, please note that, according to CreamScan analysis, it currently has a zero anti-wrinkle rating.

It contains some ingredients often marketed as effective in reducing wrinkles, specifically Camellia Sinensis Leaf Extract, Copper Tripeptide-1, and Acetyl Hexapeptide-8. However, the studies supporting the anti-wrinkle claims of these ingredients provide insufficient evidence of efficacy according to CreamScan Research Evaluation Standards. 

While this does not categorically exclude the possibility that these ingredients may reduce wrinkles, their 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, 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.

Pros & Cons of Dear, Klairs Fundamental Watery Oil Drop

 
Here’s an overview of the pros and cons of Dear, Klairs Fundamental Watery Oil Drop to help you decide if it’s the right choice for your skincare routine:
 

Pros:

  • Humectant-rich moisturizing ideal for oily skin
  • Lightweight texture
  • A humectant moisturizing boost for any skincare routine

Cons: 

  • Needs occlusives to seal in humectants if used as a standalone moisturizer
  • Questionable anti-wrinkle efficacy

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
0.3
0.3
0.3
0.3
0.3
0.3
0.3
0.3
Est. %
Water
Function:
Origin:
Glycerin
Function:
Origin:
Butylene Glycol
Function:
Origin:
Camellia Sinensis Leaf Water
Function:
Origin:
Bifida Ferment Extract
Function:
Origin:
Oryza Sativa (Rice) Extract
Function:
Origin:
Dipropylene Glycol
Function:
Origin:
Betaine
Function:
Origin:
1,2-Hexanediol
Function:
Origin:
Aspergillus/Rice Ferment Extract
Function:
Origin:
Camellia Sinensis Leaf Extract
Function:
Origin:
Sorbitol
Function:
Origin:
Sorbitan Sesquioleate
Function:
Origin:
Ethylhexylglycerin
Function:
Origin:
Arginine
Function:
Origin:
Xanthan Gum
Function:
Origin:
Hydroxyethylcellulose
Function:
Origin:
Sodium Acrylate/Sodium Acryloyldimethyl Taurate Copolymer
Function:
Origin:
Isohexadecane
Function:
Origin:
Dipotassium Glycyrrhizate
Function:
Origin:
Sodium Hyaluronate
Function:
Origin:
Carbomer
Function:
Origin:
Acrylates/C10-30 Alkyl Acrylate Crosspolymer
Function:
Origin:
Tocopheryl Acetate
Function:
Origin:
Laminaria Japonica Extract
Function:
Origin:
Polysorbate 80
Function:
Origin:
Sorbitan Oleate
Function:
Origin:
Hydrogenated Lecithin
Function:
Origin:
Ceramide NP
Function:
Origin:
Disodium Phosphate
Function:
Origin:
Polysorbate 60
Function:
Origin:
Sodium Phosphate
Function:
Origin:
Copper Tripeptide-1
Function:
Origin:
Acetyl Hexapeptide-8
Function:
Origin:

Ratings

All humectants
15.4
6
4
2
1
0.3
0.3
0.3
0.3
0.3
0.3
0.3
0.3
Benchmark
10
All occlusives
0.0
None
Benchmark
20
Moisturizing rating
5.0
Ingredient Est. % Benchmark Raiting
Humectancy All humectants 15.4 10
10.0
6
4
2
1
0.3
0.3
0.3
0.3
0.3
0.3
0.3
0.3
Occlusivity All occlusives 0.0 20
0.0
None
Moisturizing rating
5.0
Ingredient Est. % Benchmark Humectancy
6
4
2
1
0.3
0.3
0.3
0.3
0.3
0.3
0.3
0.3
All humectants 15.4 10
10
All humectants
15.4
6
4
2
1
0.3
0.3
0.3
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 -
n/a
- 0.3 -
Total
0
Camellia Sinensis Leaf Extract
-
Ingredient anti-wrinkle power
n/a
when present at, %
-
in this formula, est. %
0.3
Copper Tripeptide-1
-
Ingredient anti-wrinkle power
n/a
when present at, %
-
in this formula, est. %
0.3
Acetyl Hexapeptide-8
-
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
0.3
0.3
All antioxidants 1.2 3 No
All antioxidants
1.2
Camellia Sinensis Leaf Extract
0.3
Sodium Hyaluronate
0.3
Tocopheryl Acetate
0.3
Copper Tripeptide-1
0.3
Benchmark
3
Ingredient Est. % Benchmark
Rich in Soothing
0.3
0.3
0.3
All soothing 0.9 5 No
All soothing
0.9
0.3
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.
Glycerin
Est. %6
Function
Origin
Glycerin

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

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.

Camellia Sinensis Leaf Water
Est. %3
Function
Origin
Camellia Sinensis Leaf Water
Bifida Ferment Extract
Est. %2
Function
Origin
Bifida Ferment Extract
Oryza Sativa (Rice) Extract
Est. %1.5
Function
Origin
Oryza Sativa (Rice) ExtractAn abrasive rice extract rich in various emollient fatty acids, amino acids, and vitamin E.
Dipropylene Glycol
Est. %1.3
Function
Origin
Dipropylene GlycolA 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.
Betaine
Est. %1
Function
Origin
BetaineAn ingredient derived from the sucrose in sugar beets. It has a negative chemical charge and a positive chemical charge on the same molecule. This allows betaine to be hygroscopic or humectant and thus provide moisturization by drawing water to the skin.
1,2-Hexanediol
Est. %0.3
Function
Origin
1,2-HexanediolA multi-functional formula helper. It is a well-studied preservtive against bacteria and can help pigments and fragrances disperse evenly in a formula.
Aspergillus/Rice Ferment Extract
Est. %0.3
Function
Origin
Aspergillus/Rice Ferment Extract
Camellia Sinensis Leaf Extract
Est. %0.3
Function
Origin
Camellia Sinensis Leaf Extract

An antioxidant green tea extract. In the deeper layers, it slows down the destruction of collagen, elastin, and hyaluronic acid – thus delaying the signs of aging. It also acts as an anti-acne, soothing, moisturizing, and emollient ingredient.

Sorbitol
Est. %0.3
Function
Origin
SorbitolA sweet-tasting alcohol derived from glucose. Aside from its sweet taste (for which it is used as a very common sweetener), Sorbitol is also very good at retaining water and is used in skincare as a humectant.
Sorbitan Sesquioleate
Est. %0.3
Function
Origin
Sorbitan SesquioleateA natural liquid ingredient that is yellow to amber in color and completely transparent. It supports oil and water mixtures and disperses minerals into oils.
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.
Arginine
Est. %0.3
Function
Origin
ArginineA humectant amino acid used to attract water to the skin’s surface. It is a part of the skin's Natural Moisturizing Factor, a mixture of various compounds that keeps the skin’s surface well hydrated. Arginine can also be used as a pH adjuster.
Xanthan Gum
Est. %0.3
Function
Origin
Xanthan GumA natural multi-functional ingredient that originates from fermented sugars. Xanthan gum acts as a viscosity-building agent to thicken skincare products. It is also an excellent stabilizer and works well to hold other ingredients together.
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.
Sodium Acrylate/Sodium Acryloyldimethyl Taurate Copolymer
Est. %0.3
Function
Origin
Sodium Acrylate/Sodium Acryloyldimethyl Taurate CopolymerA multi-functional ingredient that forms a polymeric network, thereby thickening the formula and preventing other ingredients from shifting around.
Isohexadecane
Est. %0.3
Function
Origin
IsohexadecaneA clear, colorless liquid that is commonly used as an emollient. It is made up of pure hydrocarbons and leaves a dry feeling on the skin upon application. It also increases the spreadability of a product.
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.
Sodium Hyaluronate
Est. %0.3
Function
Origin
Sodium Hyaluronate

A sodium salt of famous hyaluronic acid. A potent humectant that hydrates the skin, supports collagen function, and fills out small wrinkles. Sodium hyaluronate also offers soothing and antioxidant properties.

Carbomer
Est. %0.3
Function
Origin
CarbomerA synthetic ingredient with the ability to gel water. When used in emulsions, such as lotions and creams, carbomer can also act as an emulsion stabilizer.
Acrylates/C10-30 Alkyl Acrylate Crosspolymer
Est. %0.3
Function
Origin
Acrylates/C10-30 Alkyl Acrylate CrosspolymerA synthetic ingredient that is used to thicken water and alcohol. It results in a more lightweight formula and is commonly found in gel products.
Tocopheryl Acetate
Est. %0.3
Function
Origin
Tocopheryl Acetate

An antioxidant derivative of tocopherol (vitamin E). It helps to protect cells from free radicals and UV damage through the conversion to active vitamin E in the skin. It is more stable than tocopherol.

Laminaria Japonica Extract
Est. %0.3
Function
Origin
Laminaria Japonica ExtractDerived from a species of edible seaweed, this extract contains many different moisturizing and gel-forming polysaccharides.
Polysorbate 80
Est. %0.3
Function
Origin
Polysorbate 80A non-ionic surfactant, which means that it contains no chemical charges. It can be used as a mild cleansing agent in skin cleansing products but is more commonly used for its emulsifying abilities.
Sorbitan Oleate
Est. %0.3
Function
Origin
Sorbitan OleateA vegetable-based ingredient that stabilizes mixtures of oil and water. Sorbitan oleate serves primarily as an emulsifier that produces water-in-oil emulsions.
Hydrogenated Lecithin
Est. %0.3
Function
Origin
Hydrogenated LecithinA version of plain lecithin that has been saturated with hydrogen atoms. This ingredient can be derived from plants, like soy or sunflower, from egg yolks, or made synthetically. Its major function is to emulsify water and oils.
Ceramide NP
Est. %0.3
Function
Origin
Ceramide NPAlso known as ceramide 3, it is the most common ceramide in our skin. It helps to restore the skin’s lipid barrier and alleviate the symptoms of dry and cracked skin. Research has shown that skin suffering from conditions such as AD lacks ceramides.
Disodium Phosphate
Est. %0.3
Function
Origin
Disodium PhosphateAn inorganic ingredient primarily used in skincare products as a pH adjuster.
Polysorbate 60
Est. %0.3
Function
Origin
Polysorbate 60An ester based on sorbitan. It is good for emulsifying water and oils together – specifically making oil-in-water emulsions. Polysorbate 60 is also said to give a product a notable fragrance.
Sodium Phosphate
Est. %0.3
Function
Origin
Sodium PhosphateA sodium salt of phosphoric acid that increases pH.
Copper Tripeptide-1
Est. %0.3
Function
Origin
Copper Tripeptide-1

A skin-identical, copper-binding peptide that promotes the synthesis of all structural elements in the skin.

Acetyl Hexapeptide-8
Est. %0.3
Function
Origin
Acetyl Hexapeptide-8

A small synthetic peptide that is thought to act similarly to Botox by calming contractions of the facial muscles and reducing expression wrinkles. The effect is only temporary and it does not improve the skin structure in any way.