NYX Cosmetics Can't Stop Won't Stop Matte Primer | Unbiased Skincare Efficacy Review by AI

Review

Does NYX Cosmetics Can't Stop Won't Stop Matte Primer Work?

According to CreamScan AI's analysis of the ingredient list, here’s what NYX Cosmetics Can't Stop Won't Stop Matte Primer 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 NYX Cosmetics Can't Stop Won't Stop Matte Primer

These are the key benefits you can expect from using NYX Cosmetics Can't Stop Won't Stop Matte Primer:

Lightweight Purely Humectant Moisturizing, Ideal for Oily Skin

According to CreamScan analysis, NYX Cosmetics Can't Stop Won't Stop Matte Primer 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 Argilla (est. ≈7.5%), Propylene Glycol (est. ≈3.0%) and Ethylhexylglycerin (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: NYX Cosmetics Can't Stop Won't Stop Matte Primer

CreamScan AI identified a few things to consider before adding NYX Cosmetics Can't Stop Won't Stop Matte Primer 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 NYX Cosmetics Can't Stop Won't Stop Matte Primer 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.

Pros & Cons of NYX Cosmetics Can't Stop Won't Stop Matte Primer

Here’s an overview of the pros and cons of NYX Cosmetics Can't Stop Won't Stop Matte Primer 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:

Only if used as a standalone moisturizer - it needs to be paired with occlusives to seal in humectants

Est. % The Estimated % is our algorithm-based assumption about an ingredient's concentration in a formula. Learn more The Estimated % is our algorithm-based assumption about an ingredient's concentration in a formula. Learn more	Ingredient	Origin	Functions
80	Water 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. Water 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.	Naturally occurring These are ingredients initially present in nature, such as elements (Zinc, Gold, or Silver), minerals, or water. Naturally occurring These are ingredients initially present in nature, such as elements (Zinc, Gold, or Silver), minerals, or water.	Formula helper Solvent – a liquid that dissolves other ingredients. Formula helper Solvent – a liquid that dissolves other ingredients.
7.5	Argilla Argilla	Naturally occurring These are ingredients initially present in nature, such as elements (Zinc, Gold, or Silver), minerals, or water. Naturally occurring These are ingredients initially present in nature, such as elements (Zinc, Gold, or Silver), minerals, or water.	Moisturizing (Humectant), Humectants are moisturizing ingredients that draw moisture to the skin, either from deeper layers or from the environment (when it's humid). Moisturizing (Humectant), Humectants are moisturizing ingredients that draw moisture to the skin, either from deeper layers or from the environment (when it's humid). Abrasive, Abrasives 'physically' exfoliate the skin (i.e., manually remove dead skin cells) by rubbing against its surface. Abrasive, Abrasives 'physically' exfoliate the skin (i.e., manually remove dead skin cells) by rubbing against its surface. Formula helper Bulking – increases the volume of a product. Formula helper Bulking – increases the volume of a product.
5	Lithium Magnesium Sodium Silicate Lithium Magnesium Sodium Silicate	Synthetic All kinds of ingredients formulated or produced by a chemical process, or those that have a chemical modification in their structure. Synthetic All kinds of ingredients formulated or produced by a chemical process, or those that have a chemical modification in their structure.	Formula helper Absorbent – soaks up excess oil from the skin. Bulking – increases the volume of a product. Viscosity controlling – changes the thickness of a product. Formula helper Absorbent – soaks up excess oil from the skin. Bulking – increases the volume of a product. Viscosity controlling – changes the thickness of a product.
3	Propylene Glycol A clear, thick, odorless liquid of synthetic origin. Its main function is to stabilize cosmetic products exposed to varying temperatures. It is also a moderately strong humectant with similar properties to glycerin. Propylene Glycol A clear, thick, odorless liquid of synthetic origin. Its main function is to stabilize cosmetic products exposed to varying temperatures. It is also a moderately strong humectant with similar properties to glycerin.	Botanical, Ingredients derived from plants, mosses, and lichens: extracts, oils, powders, juices and other types of processed plant materials. Botanical, Ingredients derived from plants, mosses, and lichens: extracts, oils, powders, juices and other types of processed plant materials. Synthetic All kinds of ingredients formulated or produced by a chemical process, or those that have a chemical modification in their structure. Synthetic All kinds of ingredients formulated or produced by a chemical process, or those that have a chemical modification in their structure.	Moisturizing (Humectant), Humectants are moisturizing ingredients that draw moisture to the skin, either from deeper layers or from the environment (when it's humid). Moisturizing (Humectant), Humectants are moisturizing ingredients that draw moisture to the skin, either from deeper layers or from the environment (when it's humid). Fragrance, Fragrance ingredients add scent to a product or hide ('mask') the undesired aroma of other ingredients. Fragrance, Fragrance ingredients add scent to a product or hide ('mask') the undesired aroma of other ingredients. Formula helper Solvent – a liquid that dissolves other ingredients. Viscosity controlling – changes the thickness of a product. Formula helper Solvent – a liquid that dissolves other ingredients. Viscosity controlling – changes the thickness of a product.
2	Ethylhexylglycerin 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. Ethylhexylglycerin 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.	Synthetic All kinds of ingredients formulated or produced by a chemical process, or those that have a chemical modification in their structure. Synthetic All kinds of ingredients formulated or produced by a chemical process, or those that have a chemical modification in their structure.	Moisturizing (Humectant), Humectants are moisturizing ingredients that draw moisture to the skin, either from deeper layers or from the environment (when it's humid). Moisturizing (Humectant), Humectants are moisturizing ingredients that draw moisture to the skin, either from deeper layers or from the environment (when it's humid). Preservative Preservatives prevent the growth of bacteria and fungi in a product. Preservative Preservatives prevent the growth of bacteria and fungi in a product.
1.9	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. 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.	Botanical, Ingredients derived from plants, mosses, and lichens: extracts, oils, powders, juices and other types of processed plant materials. Botanical, Ingredients derived from plants, mosses, and lichens: extracts, oils, powders, juices and other types of processed plant materials. Synthetic, All kinds of ingredients formulated or produced by a chemical process, or those that have a chemical modification in their structure. Synthetic, All kinds of ingredients formulated or produced by a chemical process, or those that have a chemical modification in their structure. Petroleum Ingredients derived from petroleum, also called crude oil. Crude oil deposits were obtained from the remains of ancient organisms, such as plants, algae, and bacteria. Petroleum Ingredients derived from petroleum, also called crude oil. Crude oil deposits were obtained from the remains of ancient organisms, such as plants, algae, and bacteria.	Moisturizing (Humectant), Humectants are moisturizing ingredients that draw moisture to the skin, either from deeper layers or from the environment (when it's humid). Moisturizing (Humectant), Humectants are moisturizing ingredients that draw moisture to the skin, either from deeper layers or from the environment (when it's humid). Fragrance, Fragrance ingredients add scent to a product or hide ('mask') the undesired aroma of other ingredients. Fragrance, Fragrance ingredients add scent to a product or hide ('mask') the undesired aroma of other ingredients. Formula helper Solvent – a liquid that dissolves other ingredients. Viscosity controlling – changes the thickness of a product. Formula helper Solvent – a liquid that dissolves other ingredients. Viscosity controlling – changes the thickness of a product.
1	Phenoxyethanol 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. Phenoxyethanol 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.	Synthetic All kinds of ingredients formulated or produced by a chemical process, or those that have a chemical modification in their structure. Synthetic All kinds of ingredients formulated or produced by a chemical process, or those that have a chemical modification in their structure.	Antimicrobial, Antimicrobials prevent the growth of harmful microorganisms on the skin. Antimicrobial, Antimicrobials prevent the growth of harmful microorganisms on the skin. Preservative Preservatives prevent the growth of bacteria and fungi in a product. Preservative Preservatives prevent the growth of bacteria and fungi in a product.

Water

Function:

Origin:

7.5

Argilla

Function:

Origin:

Lithium Magnesium Sodium Silicate

Function:

Origin:

Propylene Glycol

Function:

Origin:

Ethylhexylglycerin

Function:

Origin:

1.9

Butylene Glycol

Function:

Origin:

Phenoxyethanol

Function:

Origin:

Ratings

Argilla

7.5

Propylene Glycol

Ethylhexylglycerin

Butylene Glycol

1.9

Benchmark

None

Benchmark

Moisturizing rating

5.0

Ingredient		Est. %	Benchmark Sciense based points to which we compare all humectants and all occlusives in a product to calculate its Humectancy and Occlusivity. Sciense based points to which we compare all humectants and all occlusives in a product to calculate its Humectancy and Occlusivity.	Raiting
Humectancy	All humectants	14.4	10	10.0
	Argilla Argilla	7.5
	Propylene Glycol A clear, thick, odorless liquid of synthetic origin. Its main function is to stabilize cosmetic products exposed to varying temperatures. It is also a moderately strong humectant with similar properties to glycerin. Propylene Glycol A clear, thick, odorless liquid of synthetic origin. Its main function is to stabilize cosmetic products exposed to varying temperatures. It is also a moderately strong humectant with similar properties to glycerin.	3
	Ethylhexylglycerin 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. Ethylhexylglycerin 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.	2
	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. 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.	1.9
Occlusivity	All occlusives	0.0	20	0.0
	None
Moisturizing rating				5.0

Ingredient	Est. %	Benchmark According to various studies, a formula made up of 10% humectants will significantly increase skin hydration. Some studies also suggest that any further icrease in the consentration of humectants does not translate inty any more hydration and may even be dehydrating. To achieve maximum Humectancy, the product should have humectants with a total score of 10 and more. According to various studies, a formula made up of 10% humectants will significantly increase skin hydration. Some studies also suggest that any further icrease in the consentration of humectants does not translate inty any more hydration and may even be dehydrating. To achieve maximum Humectancy, the product should have humectants with a total score of 10 and more.	Humectancy
Argilla Argilla	7.5
Propylene Glycol A clear, thick, odorless liquid of synthetic origin. Its main function is to stabilize cosmetic products exposed to varying temperatures. It is also a moderately strong humectant with similar properties to glycerin. Propylene Glycol A clear, thick, odorless liquid of synthetic origin. Its main function is to stabilize cosmetic products exposed to varying temperatures. It is also a moderately strong humectant with similar properties to glycerin.	3
Ethylhexylglycerin 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. Ethylhexylglycerin 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.	2
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. 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.	1.9
All humectants	14.4	10	10

Argilla

7.5

Propylene Glycol

Ethylhexylglycerin

Butylene Glycol

1.9

Benchmark

Ingredient	Est. %	Benchmark The most occlusive product possible is 100% petrolatum (hello Vaseline Jelly). According to studies, hovewer, even 10% petrolatum can achieve almost the same mosturizing effect. The occlusive properties of petrolatum are at least twice as superior as other occlusive ingredients. This is why, in order to match the moisturizing efficacy of 10% petrolatum, a product needs to contain at least 20% of other occlusives. Our benchmark for maximum Occlusivity is 20 (and the petrolatum score is always doubled). The most occlusive product possible is 100% petrolatum (hello Vaseline Jelly). According to studies, hovewer, even 10% petrolatum can achieve almost the same mosturizing effect. The occlusive properties of petrolatum are at least twice as superior as other occlusive ingredients. This is why, in order to match the moisturizing efficacy of 10% petrolatum, a product needs to contain at least 20% of other occlusives. Our benchmark for maximum Occlusivity is 20 (and the petrolatum score is always doubled).	Occlusivity
None
All occlusives	0.0	20	0.0

None

Benchmark

Ingredient	Ingredient anti-wrinkle power Shows on a scale of 0-10 how effective an ingredient is at reducing wrinkles. Both the Reported Efficacy of the ingredient and the Strength of Evidence are taken into account. Shows on a scale of 0-10 how effective an ingredient is at reducing wrinkles. Both the Reported Efficacy of the ingredient and the Strength of Evidence are taken into account.	when present at, %	in this formula est. %	Rating
None
Total				0

None

Anti-wrinkle rating

Ingredient	Est. %	Benchmark It differs from one antioxidant ingredient to another, but, on average, the research suggests that topically applied antioxidants are effective in consentrations of 3% or above. Any product with a total antioxidant score of 3 or more is considered to be reach in antioxidants. It differs from one antioxidant ingredient to another, but, on average, the research suggests that topically applied antioxidants are effective in consentrations of 3% or above. Any product with a total antioxidant score of 3 or more is considered to be reach in antioxidants.	Rich in Antioxidants
None
All antioxidants	0	3	No

None

Benchmark

Ingredient	Est. %	Benchmark The effective concentration of soothing ingredients varies, but we consider a product rich in soothing ingredients if their estimated concentration is equal to or higher than 5%. The effective concentration of soothing ingredients varies, but we consider a product rich in soothing ingredients if their estimated concentration is equal to or higher than 5%.	Rich in Soothing
None
All soothing	0	5	No

None

Benchmark

Ingredients explained

Water
Est. %	80
Function	Solvent Solvent – a liquid that dissolves other ingredients. Solvent Solvent – a liquid that dissolves other ingredients.
Origin	Naturally occurring These are ingredients initially present in nature, such as elements (Zinc, Gold, or Silver), minerals, or water. Naturally occurring These are ingredients initially present in nature, such as elements (Zinc, Gold, or Silver), minerals, or water.

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.

Argilla
Est. %	7.5
Function	Moisturizing (Humectant), Humectants are moisturizing ingredients that draw moisture to the skin, either from deeper layers or from the environment (when it's humid). Moisturizing (Humectant), Humectants are moisturizing ingredients that draw moisture to the skin, either from deeper layers or from the environment (when it's humid). Abrasive, Abrasives 'physically' exfoliate the skin (i.e., manually remove dead skin cells) by rubbing against its surface. Abrasive, Abrasives 'physically' exfoliate the skin (i.e., manually remove dead skin cells) by rubbing against its surface. Bulking Bulking – increases the volume of a product. Bulking Bulking – increases the volume of a product.
Origin	Naturally occurring These are ingredients initially present in nature, such as elements (Zinc, Gold, or Silver), minerals, or water. Naturally occurring These are ingredients initially present in nature, such as elements (Zinc, Gold, or Silver), minerals, or water.

Lithium Magnesium Sodium Silicate
Est. %	5
Function	Absorbent, Absorbent – soaks up excess oil from the skin. Absorbent, Absorbent – soaks up excess oil from the skin. Bulking, Bulking – increases the volume of a product. Bulking, Bulking – increases the volume of a product. Viscosity Controlling Viscosity controlling – changes the thickness of a product. Viscosity Controlling Viscosity controlling – changes the thickness of a product.
Origin	Synthetic All kinds of ingredients formulated or produced by a chemical process, or those that have a chemical modification in their structure. Synthetic All kinds of ingredients formulated or produced by a chemical process, or those that have a chemical modification in their structure.

Propylene Glycol
Est. %	3
Function	Moisturizing (Humectant), Humectants are moisturizing ingredients that draw moisture to the skin, either from deeper layers or from the environment (when it's humid). Moisturizing (Humectant), Humectants are moisturizing ingredients that draw moisture to the skin, either from deeper layers or from the environment (when it's humid). Fragrance, Fragrance ingredients add scent to a product or hide ('mask') the undesired aroma of other ingredients. Fragrance, Fragrance ingredients add scent to a product or hide ('mask') the undesired aroma of other ingredients. Solvent, Solvent – a liquid that dissolves other ingredients. Solvent, Solvent – a liquid that dissolves other ingredients. Viscosity Controlling Viscosity controlling – changes the thickness of a product. Viscosity Controlling Viscosity controlling – changes the thickness of a product.
Origin	Botanical, Ingredients derived from plants, mosses, and lichens: extracts, oils, powders, juices and other types of processed plant materials. Botanical, Ingredients derived from plants, mosses, and lichens: extracts, oils, powders, juices and other types of processed plant materials. Synthetic All kinds of ingredients formulated or produced by a chemical process, or those that have a chemical modification in their structure. Synthetic All kinds of ingredients formulated or produced by a chemical process, or those that have a chemical modification in their structure.

A clear, thick, odorless liquid of synthetic origin. Its main function is to stabilize cosmetic products exposed to varying temperatures. It is also a moderately strong humectant with similar properties to glycerin.

Ethylhexylglycerin
Est. %	2
Function	Moisturizing (Humectant), Humectants are moisturizing ingredients that draw moisture to the skin, either from deeper layers or from the environment (when it's humid). Moisturizing (Humectant), Humectants are moisturizing ingredients that draw moisture to the skin, either from deeper layers or from the environment (when it's humid). Preservative Preservatives prevent the growth of bacteria and fungi in a product. Preservative Preservatives prevent the growth of bacteria and fungi in a product.
Origin	Synthetic All kinds of ingredients formulated or produced by a chemical process, or those that have a chemical modification in their structure. Synthetic All kinds of ingredients formulated or produced by a chemical process, or those that have a chemical modification in their structure.

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.

Butylene Glycol
Est. %	1.9
Function	Moisturizing (Humectant), Humectants are moisturizing ingredients that draw moisture to the skin, either from deeper layers or from the environment (when it's humid). Moisturizing (Humectant), Humectants are moisturizing ingredients that draw moisture to the skin, either from deeper layers or from the environment (when it's humid). Fragrance, Fragrance ingredients add scent to a product or hide ('mask') the undesired aroma of other ingredients. Fragrance, Fragrance ingredients add scent to a product or hide ('mask') the undesired aroma of other ingredients. Solvent, Solvent – a liquid that dissolves other ingredients. Solvent, Solvent – a liquid that dissolves other ingredients. Viscosity Controlling Viscosity controlling – changes the thickness of a product. Viscosity Controlling Viscosity controlling – changes the thickness of a product.
Origin	Botanical, Ingredients derived from plants, mosses, and lichens: extracts, oils, powders, juices and other types of processed plant materials. Botanical, Ingredients derived from plants, mosses, and lichens: extracts, oils, powders, juices and other types of processed plant materials. Synthetic, All kinds of ingredients formulated or produced by a chemical process, or those that have a chemical modification in their structure. Synthetic, All kinds of ingredients formulated or produced by a chemical process, or those that have a chemical modification in their structure. Petroleum Ingredients derived from petroleum, also called crude oil. Crude oil deposits were obtained from the remains of ancient organisms, such as plants, algae, and bacteria. Petroleum Ingredients derived from petroleum, also called crude oil. Crude oil deposits were obtained from the remains of ancient organisms, such as plants, algae, and bacteria.

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.

Phenoxyethanol
Est. %	1
Function	Antimicrobial, Antimicrobials prevent the growth of harmful microorganisms on the skin. Antimicrobial, Antimicrobials prevent the growth of harmful microorganisms on the skin. Preservative Preservatives prevent the growth of bacteria and fungi in a product. Preservative Preservatives prevent the growth of bacteria and fungi in a product.
Origin	Synthetic All kinds of ingredients formulated or produced by a chemical process, or those that have a chemical modification in their structure. Synthetic All kinds of ingredients formulated or produced by a chemical process, or those that have a chemical modification in their structure.

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.