Kiehl's Rare Earth Pore Refining Tonic

Kiehl's Rare Earth Pore Refining Tonic
3.6
/ 10
Moisturizing
7.3 Humectancy icon Humectancy
0.0 Occlusivity icon Occlusivity

Review

Does Kiehl's Rare Earth Pore Refining Tonic work?

Based on the ingredient list analysis by CreamScan AI, these are the key benefits you can expect from using Kiehl's Rare Earth Pore Refining Tonic:

  • Light moisturizing. It has a moisturizing rating of 3.6 out of 10.

Lightweight moisturizer well-suited for oily skin and a humectant enhancement for any skincare routine

According to CreamScan analysis, Kiehl's Rare Earth Pore Refining Tonic is lightly moisturizing, with a moisturizing rating of 3.6 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 high humectancy of 7.3 out of 10, primarily due to the high content of Glycerin (est. ≈4.0%) and Propanediol (est. ≈3.0%).

This humectant-rich product, when used alone as a moisturizer, is well-suited for oily skin, providing moderate 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.

But it’s not limited to oily skin - such a humectant enhancement 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.

Ingredients

Est. % Ingredient Origin Functions
80
6
4
3
2
1
1
1
0.3
0.3
0.3
0.3
0.3
0.3
0.3
0.3
Est. %
Water
Function:
Origin:
Alcohol Denat.
Function:
Origin:
Glycerin
Function:
Origin:
Propanediol
Function:
Origin:
Silica
Function:
Origin:
Phenoxyethanol
Function:
Origin:
Zinc Oxide
Function:
Origin:
Methyl Methacrylate Crosspolymer
Function:
Origin:
Kaolin
Function:
Origin:
Zinc Gluconate
Function:
Origin:
Aloe Barbadensis Leaf
Function:
Origin:
Avena Sativa (Oat) Kernel Flour
Function:
Origin:
Menthoxypropanediol
Function:
Origin:
Hamamelis Virginiana (Witch Hazel) Water
Function:
Origin:
Allantoin
Function:
Origin:
Salicylic Acid
Function:
Origin:

Ratings

All humectants
7.3
4
3
0.3
Benchmark
10
All occlusives
0.0
None
Benchmark
20
Moisturizing rating
3.6
Ingredient Est. % Benchmark Raiting
Humectancy All humectants 7.3 10
7.3
4
3
0.3
Occlusivity All occlusives 0.0 20
0.0
None
Moisturizing rating
3.6
Ingredient Est. % Benchmark Humectancy
4
3
0.3
All humectants 7.3 10
7.3
All humectants
7.3
4
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
None
Total
0
None
Anti-wrinkle rating
0
Ingredient Est. % Benchmark
Rich in Antioxidants
0.3
All antioxidants 0.3 3 No
All antioxidants
0.3
Avena Sativa (Oat) Kernel Flour
0.3
Benchmark
3
Ingredient Est. % Benchmark
Rich in Soothing
0.3
0.3
0.3
0.3
0.3
All soothing 1.5 5 No
All soothing
1.5
0.3
0.3
0.3
0.3
0.3
Benchmark
5

Ingredients explained

Water
Est. %80
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.

Glycerin
Est. %4
Function
Origin
Glycerin

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

Propanediol
Est. %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.
Silica
Est. %2
Function
Origin
SilicaA widely used cosmetic ingredient with the same chemical composition as the sand found on beaches. A common function of silica is its ability to control viscosity. In certain chemical forms, it can effectively thicken cream-style products.
Phenoxyethanol
Est. %1
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.
Zinc Oxide
Est. %1
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.
Methyl Methacrylate Crosspolymer
Est. %1
Function
Origin
Methyl Methacrylate CrosspolymerA 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.
Kaolin
Est. %0.3
Function
Origin
KaolinA type of mineral clay milled into a white, very fine powder. It is able to absorb sweat and oil, which then helps to keep the skin matte. The larger particles of kaolin are used in skin scrubs as an abrasive ingredient.
Zinc Gluconate
Est. %0.3
Function
Origin
Zinc GluconateOne of the most commonly used ingredients in anti-acne products. It is an organic salt of zinc that helps to combat microbial infections, soothes and heals inflamed pimples, and regulates hormones in the skin.
Aloe Barbadensis Leaf
Est. %0.3
Function
Origin
Aloe Barbadensis Leaf
Avena Sativa (Oat) Kernel Flour
Est. %0.3
Function
Origin
Avena Sativa (Oat) Kernel FlourA mild abrasive, finely milled oat kernel flour that is also used as a formula helper.
Menthoxypropanediol
Est. %0.3
Function
Origin
Menthoxypropanediol
Hamamelis Virginiana (Witch Hazel) Water
Est. %0.3
Function
Origin
Hamamelis Virginiana (Witch Hazel) WaterA fragrant, astringent essential water obtained by steeping and distilling the twigs and leaves of the witch hazel plant. It leaves the skin feeling tight and refreshed after application and helps with the healing of small cuts on the skin.
Allantoin
Est. %0.3
Function
Origin
AllantoinA fluffy, white powder that acts as a humectant due to its water-loving chemistry and as an exfoliant that helps to remove dead skin cells. It has also been shown to be very soothing to irritated and inflamed skin.
Salicylic Acid
Est. %0.3
Function
Origin
Salicylic AcidThis effective peeling and anti-inflammatory BHA is used as an anti-acne agent and works by breaking down the junctions between dead skin cells. This results in the peeling of dead skin and the unclogging of pores.