CLEARSTEM Skincare Sulfur SPOT&MASK

CLEARSTEM Skincare Sulfur SPOT&MASK

Efficacy100/100IrritancyHigh

Works for

Anti-blemish
Sulfur, Niacinamide + 4 more
Works well
What the product description says
“This treatment starts to zap whiteheads and bacteria in a matter of minutes and should be used as a weekly preventative mask in addiiton to being a spot treatment.”
Source: CLEARSTEM

This product can help reduce breakouts and clogged pores because it contains the following ingredient: niacinamide, sulfur. These ingredients is used for treating acne and can have a noticeable effect.

The following ingredient (ingredients) in this product might be helpful, but there is no evidence to confirm that it actually works: glycolic acid

SulfurHeroEffect: High5%
NiacinamideHeroEffect: HighIs proven to be effective in reducing blemishes, evening out skin tone and helping to improve lines and wrinkles. It helps the skin to repair sun damage, calm down inflammation and keep maintain good levels of moisture. The concentration of about 2% is effective for supporting the skin barrier and evening out the skin tone. Concentration of 4-6% is better for helping with acne and balancing the sebum production~1.4–1.7%
Glycolic acidKey activeEffect: MediumAn alpha-hydroxy acid (AHA) that helps to remove the dead skin cells on the surface of the skin reveling a more even, smoother complexation. It is also able to stimulate collagen production with long-term use. Could help to reduce pore congestion. It can be irritating to the skin. Apply sunscreen daily if using products with glycolic acid~2.5–3.1%
KaolinEffect: LowA type of clay that consists mainly of aluminum silicate. Helps absorb oil and creates a thicker product consistency. Can be used to add a white color~8.3–10.1%
BentoniteEffect: LowHelps stabilize the product formulation~0.75–1.15%
Aloe barbadensis leaf juiceEffect: Low, below effective doseTraditionally used to treat sunburns, dermatitis and inflammation, but evidence for its effectiveness is lacking. The extract can contain humectants that help attract water into the skin~0.45–0.65%
Anti-aging
Side benefit · Lactic acid, Glycolic acid + 2 more
Works well

This product can help reduce and prevent fine lines and wrinkles, improve skin elasticity and firmness because it contains glycolic acid, niacinamide.

These ingredients in the product can also be helpful, even though there is less evidence for their effectiveness: lactic acid.

Keep in mind that it typically takes at least 6 weeks to notice any results because the changes that are needed to improve fine lines and elasticity happen in the deeper layers of the skin. No topical anti-aging product can “erase” wrinkles or fully reverse signs of aging.

Lactic acidKey activeEffect: MediumAn exfoliating and moisturizing alpha-hydroxy acid (AHA). Typically causes less irritation than other AHAs, for example, glycolic acid. At high concentrations (about 15%), lactic acid can help reduce lines and wrinkles. Recent studies show that lactic acid can support the "good" bacteria living on skin's surface (healthy skin microbiome)~3.5–4.2%
Glycolic acidKey activeEffect: HighAn alpha-hydroxy acid (AHA) that helps to remove the dead skin cells on the surface of the skin reveling a more even, smoother complexation. It is also able to stimulate collagen production with long-term use. Could help to reduce pore congestion. It can be irritating to the skin. Apply sunscreen daily if using products with glycolic acid~2.5–3.1%
NiacinamideKey activeEffect: HighIs proven to be effective in reducing blemishes, evening out skin tone and helping to improve lines and wrinkles. It helps the skin to repair sun damage, calm down inflammation and keep maintain good levels of moisture. The concentration of about 2% is effective for supporting the skin barrier and evening out the skin tone. Concentration of 4-6% is better for helping with acne and balancing the sebum production~1.4–1.7%
Aloe barbadensis leaf juiceEffect: Low, below effective doseTraditionally used to treat sunburns, dermatitis and inflammation, but evidence for its effectiveness is lacking. The extract can contain humectants that help attract water into the skin~0.45–0.65%
Moisturizing
Side benefit · Niacinamide, Glycerin + 8 more
Works well

This product can help improve hydration of the skin with the two types of ingredients.

The first type is called “humectants”:
these ingredients help attract water. When humectants are on the surface of the skin, they “pull in” the moisture from the outside environment, or from within deeper layers of the skin. The following ingredients in this product do the job: glycerin, lactic acid.

This product also contains ingredients called “occlusives”. They help reduce the speed with which our skin loses moisture to the outside environment. These ingredients also help soften the upper layer of the skin, so it feels less tight and nicer to the touch. The following ingredients in this product do the job: caprylic/capric triglyceride, cannabis sativa seed oil.

The following ingredients in this product are especially good for supporting the skin barrier and helping with the hydration level: niacinamide

NiacinamideHeroEffect: HighIs proven to be effective in reducing blemishes, evening out skin tone and helping to improve lines and wrinkles. It helps the skin to repair sun damage, calm down inflammation and keep maintain good levels of moisture. The concentration of about 2% is effective for supporting the skin barrier and evening out the skin tone. Concentration of 4-6% is better for helping with acne and balancing the sebum production~1.4–1.7%
GlycerinKey active· HumectantEffect: HighOne of the best moisturizing ingredients. Naturally present in skin. It attracts water to the upper layer of the skin working as a humectant~5.5–6.7%
Lactic acidKey active· HumectantEffect: HighAn exfoliating and moisturizing alpha-hydroxy acid (AHA). Typically causes less irritation than other AHAs, for example, glycolic acid. At high concentrations (about 15%), lactic acid can help reduce lines and wrinkles. Recent studies show that lactic acid can support the "good" bacteria living on skin's surface (healthy skin microbiome)~3.5–4.2%
Caprylic/capric triglycerideKey active· Emollient, OcclusiveEffect: HighA good mix of fatty acids that forms a protective layer on the skin. Improves the shelf life of products. Derived from coconut and glycerin~2.4–3%
Cetearyl alcoholKey active· EmollientEffect: MediumA non-drying alcohol. Works as an emollient. Helps water and oil mix together and creates a nice product texture~1.9–2.4%
Cetyl alcoholKey active· EmollientEffect: MediumA non-drying alcohol that works to soften the skin and stabilize product formulations helping oil and water mix together~1.8–2.2%
Cannabis sativa seed oilKey active· EmollientEffect: HighA plant oil that due to its high linoleic acid content can help strengthen skin's barrier function and soften its upper layer~0.5–0.75%
Sodium pcaKey active· HumectantEffect: HighNaturally present in skin and helps to attract water to its upper layer~0.1–0.2%
Glyceryl caprylate· EmollientEffect: LowAn emollient that can also help water and oil mix together, as well as prevent bacteria growth in products~0.3–0.55%
Aloe barbadensis leaf juiceEffect: Low, below effective doseTraditionally used to treat sunburns, dermatitis and inflammation, but evidence for its effectiveness is lacking. The extract can contain humectants that help attract water into the skin~0.45–0.65%
Evens skin tone
Side benefit · Lactic acid, Glycolic acid + 1 more
Works well

This product can help reduce hypepigmentation and even out the skin tone because it contains the following effective ingredients: glycolic acid, lactic acid, niacinamide

Keep in mind that you would need to apply any topical skincare targetted at hypigmentation consistently for a couple of months to get a result. No topical skincare product can help get rid of hyperpigmentation (including post-acne marks and age spots) instantly.

Lactic acidKey activeEffect: HighAn exfoliating and moisturizing alpha-hydroxy acid (AHA). Typically causes less irritation than other AHAs, for example, glycolic acid. At high concentrations (about 15%), lactic acid can help reduce lines and wrinkles. Recent studies show that lactic acid can support the "good" bacteria living on skin's surface (healthy skin microbiome)~3.5–4.2%
Glycolic acidKey activeEffect: HighAn alpha-hydroxy acid (AHA) that helps to remove the dead skin cells on the surface of the skin reveling a more even, smoother complexation. It is also able to stimulate collagen production with long-term use. Could help to reduce pore congestion. It can be irritating to the skin. Apply sunscreen daily if using products with glycolic acid~2.5–3.1%
NiacinamideKey activeEffect: HighIs proven to be effective in reducing blemishes, evening out skin tone and helping to improve lines and wrinkles. It helps the skin to repair sun damage, calm down inflammation and keep maintain good levels of moisture. The concentration of about 2% is effective for supporting the skin barrier and evening out the skin tone. Concentration of 4-6% is better for helping with acne and balancing the sebum production~1.4–1.7%
Exfoliation
Side benefit · Lactic acid, Glycolic acid
Works well

This product can help exfoliate the skin. In other words, it helps break down the bonds between dead cells on the surface of the skin and speed up the skin turnover. Skin often appears softer and brighter after exfoliation, but overdoing it can result in disrupted skin barrier. The following ingredient is doing the exfoliating job in this product: glycolic acid, lactic acid.

Lactic acidKey activeEffect: HighAn exfoliating and moisturizing alpha-hydroxy acid (AHA). Typically causes less irritation than other AHAs, for example, glycolic acid. At high concentrations (about 15%), lactic acid can help reduce lines and wrinkles. Recent studies show that lactic acid can support the "good" bacteria living on skin's surface (healthy skin microbiome)~3.5–4.2%
Glycolic acidKey activeEffect: HighAn alpha-hydroxy acid (AHA) that helps to remove the dead skin cells on the surface of the skin reveling a more even, smoother complexation. It is also able to stimulate collagen production with long-term use. Could help to reduce pore congestion. It can be irritating to the skin. Apply sunscreen daily if using products with glycolic acid~2.5–3.1%

Can it cause trouble?

Irritancy
3 strong irritants: Hydrolyzed gardenia florida extract, Lavandula angustifolia oil + 1 more — patch-test recommended
High risk
We flagged 15 ingredients with irritancy potential. Severity depends on your sensitivity threshold; the table lists the worst offenders first.
IngredientFunctionIrritationEst. amount
Glycolic acidAn alpha-hydroxy acid (AHA) that helps to remove the dead skin cells on the surface of the skin reveling a more even, smoother complexation. It is also able to stimulate collagen production with long-term use. Could help to reduce pore congestion. It can be irritating to the skin. Apply sunscreen daily if using products with glycolic acidHigh~2.5–3.1%est.
Hydrolyzed gardenia florida extractUsed as a fragrance. Might have some anti-oxidant propertiesHigh~0.5–0.7%est.
Lavandula angustifolia oilAn essential oil. Potential allergen and can be irritating. It has some anti-bacterial propertiesHigh~0.3–0.6%est.
Vanilla planifolia fruit extractA plant extract used as a fragrance. Can be irritatingHigh~0.3–0.55%est.
Sulfur—Medium5%
Lactic acidAn exfoliating and moisturizing alpha-hydroxy acid (AHA). Typically causes less irritation than other AHAs, for example, glycolic acid. At high concentrations (about 15%), lactic acid can help reduce lines and wrinkles. Recent studies show that lactic acid can support the "good" bacteria living on skin's surface (healthy skin microbiome)Medium~3.5–4.2%est.
Caprylic/capric triglycerideA good mix of fatty acids that forms a protective layer on the skin. Improves the shelf life of products. Derived from coconut and glycerinMedium~2.4–3%est.
Acacia senegal gumHelps mask the small of other ingredients and improve the product textureMedium~1–1.2%est.
Sodium stearoyl glutamateHelps oil and water mix togetherMedium~0.6–0.95%est.
Caprylhydroxamic acidA preservativeMedium~0.5–0.8%est.
Aloe barbadensis leaf juiceTraditionally used to treat sunburns, dermatitis and inflammation, but evidence for its effectiveness is lacking. The extract can contain humectants that help attract water into the skinMedium~0.45–0.65%est.
Cannabis sativa seed oilA plant oil that due to its high linoleic acid content can help strengthen skin's barrier function and soften its upper layerMedium~0.5–0.75%est.
Tocopheryl acetateA more stable but less bio-available form of vitamin E compared to Tocopherol. Might help moisturize and protect the skin from free radicals, but mostly used in low concentrations to stabilize other ingredients.Medium~0.2–0.4%est.
Triethyl citrateUsed as a fragrance. Rarely causes irritationMedium~0.15–0.3%est.
Citric acidCan work as an exfoliant but is typically used to adjust the product pHMedium~0.1–0.15%est.
Comedogenic
1 ingredient rated 2 or more on the 0–5 pore-clogging scale
1 flagged
These ingredients have a comedogenic rating of 2 or more on a 0–5 scale; the table shows each one's rating. In leave-on products they can clog pores in acne-prone skin.
IngredientFunctionRatingEst. amount
Cetearyl alcoholA non-drying alcohol. Works as an emollient. Helps water and oil mix together and creates a nice product texture2/5~1.9–2.4%est.

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Ingredients

Filter by role to see what each ingredient is doing.

Sulfur5%
Hero · Anti-blemishIrritant · medium
Irritation risk
Medium
Works for
Anti-blemish
More about Sulfur
Water~45–55%
Formula
Irritation risk
Low

Plain old water

More about Water
Kaolin~8.3–10.1%
Formula
Irritation risk
Low
Works for
MattifyingAnti-blemish

A type of clay that consists mainly of aluminum silicate. Helps absorb oil and creates a thicker product consistency. Can be used to add a white color

More about Kaolin
Glycerin~5.5–6.7%
Key active
Irritation risk
Low
Works for
Moisturizing

One of the best moisturizing ingredients. Naturally present in skin. It attracts water to the upper layer of the skin working as a humectant

More about Glycerin
Lactic acid~3.5–4.2%
Key activeIrritant · medium
Irritation risk
Medium
Works for
ExfoliationEvens skin toneMoisturizingAnti-aging

An exfoliating and moisturizing alpha-hydroxy acid (AHA). Typically causes less irritation than other AHAs, for example, glycolic acid. At high concentrations (about 15%), lactic acid can help reduce lines and wrinkles. Recent studies show that lactic acid can support the "good" bacteria living on skin's surface (healthy skin microbiome)

More about Lactic acid
Glycolic acid~2.5–3.1%
Key activeIrritant · high
Irritation risk
High
Works for
Anti-agingEvens skin toneExfoliationAnti-blemish

An alpha-hydroxy acid (AHA) that helps to remove the dead skin cells on the surface of the skin reveling a more even, smoother complexation. It is also able to stimulate collagen production with long-term use. Could help to reduce pore congestion. It can be irritating to the skin. Apply sunscreen daily if using products with glycolic acid

More about Glycolic acid
Caprylic/capric triglyceride~2.4–3%
Key activeIrritant · medium
Irritation risk
Medium
Works for
Moisturizing

A good mix of fatty acids that forms a protective layer on the skin. Improves the shelf life of products. Derived from coconut and glycerin

More about Caprylic/capric triglyceride
Cetearyl alcohol~1.9–2.4%
Key activeComedogenic 2/5
Irritation risk
Low
Comedogenicity
2/5
Works for
CleansingMoisturizing

A non-drying alcohol. Works as an emollient. Helps water and oil mix together and creates a nice product texture

More about Cetearyl alcohol
Cetyl alcohol~1.8–2.2%
Key active
Irritation risk
Low
Works for
CleansingMoisturizing

A non-drying alcohol that works to soften the skin and stabilize product formulations helping oil and water mix together

More about Cetyl alcohol
Niacinamide~1.4–1.7%
Hero · Moisturizing, Anti-blemish
Irritation risk
Low
Works for
MoisturizingEvens skin toneAnti-blemishAnti-agingReduces irritationReduces rednessAnti-inflammatoryAntibacterial

Is proven to be effective in reducing blemishes, evening out skin tone and helping to improve lines and wrinkles. It helps the skin to repair sun damage, calm down inflammation and keep maintain good levels of moisture. The concentration of about 2% is effective for supporting the skin barrier and evening out the skin tone. Concentration of 4-6% is better for helping with acne and balancing the sebum production

More about Niacinamide
Sodium hydroxide~1.2–1.4%
Formula
Irritation risk
Low

Used to adjust the product's pH

More about Sodium hydroxide
Acacia senegal gum~1–1.2%
Irritant · medium
Irritation risk
Medium

Helps mask the small of other ingredients and improve the product texture

More about Acacia senegal gum
Bentonite~0.75–1.15%
Formula
Irritation risk
Low
Works for
Anti-blemish

Helps stabilize the product formulation

More about Bentonite
Cetearyl olivate~0.65–1%
Formula
Irritation risk
Low
Works for
Cleansing

Helps oil and water mix together

More about Cetearyl olivate
Xanthan gum~0.6–0.9%
Formula
Irritation risk
Low
Works for
Cleansing

Used to create a thicker product consistency

More about Xanthan gum
Sodium stearoyl glutamate~0.6–0.95%
Irritant · medium
Irritation risk
Medium
Works for
Cleansing

Helps oil and water mix together

More about Sodium stearoyl glutamate
Sorbitan olivate~0.55–0.85%
Formula
Irritation risk
Low
Works for
Cleansing

Helps oil and water mix together

More about Sorbitan olivate
Caprylhydroxamic acid~0.5–0.8%
Irritant · medium
Irritation risk
Medium

A preservative

More about Caprylhydroxamic acid
Hydrolyzed gardenia florida extract~0.5–0.7%
Irritant · high
Irritation risk
High
Works for
Anti-oxidation

Used as a fragrance. Might have some anti-oxidant properties

More about Hydrolyzed gardenia florida extract
Aloe barbadensis leaf juice~0.45–0.65%
Irritant · medium
Irritation risk
Medium
Works for
MoisturizingAntibacterialAnti-inflammatoryReduces rednessReduces irritationAnti-blemishAnti-aging

Traditionally used to treat sunburns, dermatitis and inflammation, but evidence for its effectiveness is lacking. The extract can contain humectants that help attract water into the skin

More about Aloe barbadensis leaf juice
Cannabis sativa seed oil~0.5–0.75%
Key activeIrritant · medium
Irritation risk
Medium
Works for
Moisturizing

A plant oil that due to its high linoleic acid content can help strengthen skin's barrier function and soften its upper layer

More about Cannabis sativa seed oil
Lavandula angustifolia oil~0.3–0.6%
Irritant · high
Irritation risk
High

An essential oil. Potential allergen and can be irritating. It has some anti-bacterial properties

More about Lavandula angustifolia oil
Vanilla planifolia fruit extract~0.3–0.55%
Irritant · high
Irritation risk
High

A plant extract used as a fragrance. Can be irritating

More about Vanilla planifolia fruit extract
Zinc oxide~0.45–0.7%
Formula
Irritation risk
Low
Works for
Sun protection

A broad spectrum sunblock (protects from both UVA and UVB rays). Is suitable for most sensitive skins. In small concentrations, can be used as a colorant

More about Zinc oxide
Tocopheryl acetate~0.2–0.4%
Irritant · medium
Irritation risk
Medium
Works for
Anti-oxidation

A more stable but less bio-available form of vitamin E compared to Tocopherol. Might help moisturize and protect the skin from free radicals, but mostly used in low concentrations to stabilize other ingredients.

More about Tocopheryl acetate
Glyceryl caprylate~0.3–0.55%
Formula
Irritation risk
Low
Works for
CleansingMoisturizing

An emollient that can also help water and oil mix together, as well as prevent bacteria growth in products

More about Glyceryl caprylate
Triethyl citrate~0.15–0.3%
Irritant · medium
Irritation risk
Medium

Used as a fragrance. Rarely causes irritation

More about Triethyl citrate
Maltodextrin~0.15–0.3%
Formula
Irritation risk
Low
Works for
Mattifying

Used to stabilize the product formulation and can help absorb oil

More about Maltodextrin
Sodium pca~0.1–0.2%
Key active
Irritation risk
Low
Works for
Moisturizing

Naturally present in skin and helps to attract water to its upper layer

More about Sodium pca
Citric acid~0.1–0.15%
Irritant · medium
Irritation risk
Medium

Can work as an exfoliant but is typically used to adjust the product pH

More about Citric acid
Ingredient list view

Sulfur, Water, Kaolin, Glycerin, Lactic acid, Glycolic acid, Caprylic/capric triglyceride, Cetearyl alcohol, Cetyl alcohol, Niacinamide, Sodium hydroxide, Acacia senegal gum, Bentonite, Cetearyl olivate, Xanthan gum, Sodium stearoyl glutamate, Sorbitan olivate, Caprylhydroxamic acid, Hydrolyzed gardenia florida extract, Aloe barbadensis leaf juice, Cannabis sativa seed oil, Lavandula angustifolia oil, Vanilla planifolia fruit extract, Zinc oxide, Tocopheryl acetate, Glyceryl caprylate, Triethyl citrate, Maltodextrin, Sodium pca, Citric acid

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CLEARSTEM
$34.00
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Worth comparing, line by line.

Match % combines shared ingredients, the first five ingredients, shared actives and hero ingredients, irritancy (lower counts in the alternative's favour), texture and body area. Only products in the same routine step are compared.

Side-by-side comparison of this product against its closest alternatives
CLEARSTEM SkincareSulfur SPOT&MASKYOUR PRODUCTKiehl'ss Breakout Control Targeted Blemish Spot TreatmentDRMTLGYBarrier Repair MaskDr Dennis GrossVitamin C Lactic Biocellulose Brightening Treatment Mask
Match—84%78%78%
Price$34.00—$46.00+$12.00$20.25−$13.75
Shared key ingredients—4 of 101 of 103 of 10
Key difference—Phenylethyl ResorcinolCeramide ApVitamin C
Irritancy High Low Medium High
Drying alcohol————
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Sources cited in this review

Every concentration estimate and effectiveness label is anchored to one of these 16 studies and safety reviews.

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CLEARSTEM Skincare Sulfur SPOT&MASK
CLEARSTEM SkincareSulfur SPOT&MASK

Affiliate links · As an Amazon Associate, WIMJ earns from qualifying purchases.

As an Amazon Associate, WIMJ earns from qualifying purchases.