Prequel REDNESS REFORM SULFUR CLEANSER

Prequel REDNESS REFORM SULFUR CLEANSER

Efficacy100/100IrritancyMedium

Works for

Cleansing
Sodium lauroyl isethionate, Decyl glucoside + 12 more
Cleanses gently
What the product description says
“REDNESS REFORM SULFUR CLEANSER”
Source: Prequel

This product works by removing dirt and oil from the surface of the skin. It uses a combination of mild cleansing agents (apricot kernel oil polyglyceryl-6 esters, capric acid, cetyl phosphate, cocamide mipa, cocamidopropyl hydroxysultaine, coconut acid, decyl glucoside, lauric acid, myristic acid, sodium lauroamphoacetate, sodium lauroyl isethionate, sodium lauroyl methyl isethionate, sorbitan palmitate, xanthan gum) and should be able to cleanse the skin gently. Still keep in mind that any cleansing can disrupt the skin barrier, and most people do not need to cleanse their skin more than once per day.

Even though this formulation is mild, the following cleansing agents could trigger an irritation or allergy for some people: decyl glucoside

Sodium lauroyl isethionateEffect: High~5.6–6.8%
Decyl glucosideEffect: HighHelps oil and water mix together. Can be irritating~2.4–2.9%
Cocamidopropyl hydroxysultaineEffect: HighUsed as a cleansing agent. Helps water and oil mix together~2.3–2.8%
Sodium lauroamphoacetateEffect: High~1.5–1.8%
Sodium lauroyl methyl isethionateEffect: HighWorks as a cleansing agent~1.5–1.8%
Coconut acidEffect: High~0.4–0.65%
Lauric acidEffect: HighHelps water and oil mix together. Has anti-bacterial properties that might be helpful in preventing blemishes~0.35–0.65%
Myristic acidEffect: HighHelps oil and water mix together. Could be comedogenic~0.3–0.55%
Capric acidEffect: High~0.3–0.6%
Xanthan gumEffect: HighUsed to create a thicker product consistency~0.25–0.5%
Cocamide mipaEffect: HighSurfactant - foam booster, viscosity increasing agent - aqueous, emulsifying, emulsion stabilising, foam boosting, surfactant, and viscosity controlling. Comes from coconut acid. Doesn't appear to be a common irritant~0.25–0.45%
Sorbitan palmitateEffect: HighHelps water and oil mix together and stabilize the product formulation~0.15–0.3%
Cetyl phosphateEffect: HighHelps oil and water mix together~0.15–0.25%
Anti-blemish
Side benefit · Sulfur, Azelaic acid + 3 more
Works well

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

SulfurHeroEffect: High~1.5–1.8%
Azelaic acidHeroEffect: HighIs produced by a yeast that lives on normal human skin. It is used in medicine as a topical treatment for mild to moderate acne. It has a mild exfoliating effect. It can also help reduce hyperpigmentation, helps calm down inflammation and can help neutralize free radicals~0.95–1.15%
Centella asiatica extractEffect: LowA plant extract that has been shown to be able to reduce inflammation in skin, support restoration of skin barrier function, as well as support collagen production. Contains active compounds called centelloids: asiaticoside, madecasosside, asiatic acid and madecassic acid. Might be helpful in preventing stretch marks. It can be itself be irritating though.~0.5–0.7%
Lauric acidEffect: LowHelps water and oil mix together. Has anti-bacterial properties that might be helpful in preventing blemishes~0.35–0.65%
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%

Can it cause trouble?

Irritancy
17 flagged ingredients
Medium risk
We flagged 17 ingredients with irritancy potential. Severity depends on your sensitivity threshold; the table lists the worst offenders first.
IngredientFunctionIrritationEst. amount
Decyl glucosideHelps oil and water mix together. Can be irritatingHigh~2.4–2.9%est.
Cocamidopropyl hydroxysultaineUsed as a cleansing agent. Helps water and oil mix togetherMedium~2.3–2.8%est.
Sulfur—Medium~1.5–1.8%est.
Sodium lauroyl methyl isethionateWorks as a cleansing agentMedium~1.5–1.8%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.
Centella asiatica extractA plant extract that has been shown to be able to reduce inflammation in skin, support restoration of skin barrier function, as well as support collagen production. Contains active compounds called centelloids: asiaticoside, madecasosside, asiatic acid and madecassic acid. Might be helpful in preventing stretch marks. It can be itself be irritating though.Medium~0.5–0.7%est.
Polyglycerin-6Helps attract water to the upper layer of the skinMedium~0.35–0.65%est.
Lauric acidHelps water and oil mix together. Has anti-bacterial properties that might be helpful in preventing blemishesMedium~0.35–0.65%est.
Myristic acidHelps oil and water mix together. Could be comedogenicMedium~0.3–0.55%est.
Acacia senegal gumHelps mask the small of other ingredients and improve the product textureMedium~0.25–0.5%est.
HydroxyacetophenoneUsed to increase effectiveness of preservativesMedium~0.25–0.45%est.
Potassium sorbateA preservativeMedium~0.25–0.4%est.
Sodium polyacryloyldimethyl taurateHelps oil and water mix togetherMedium~0.2–0.35%est.
Sorbitan palmitateHelps water and oil mix together and stabilize the product formulationMedium~0.15–0.3%est.
Cetyl phosphateHelps oil and water mix togetherMedium~0.15–0.25%est.
Potassium hydroxideUsed to adjust the pH level of productsMedium~0.1–0.2%est.
Citric acidCan work as an exfoliant but is typically used to adjust the product pHMedium~0.05–0.1%est.
Comedogenic
2 ingredients rated 2 or more on the 0–5 pore-clogging scale
2 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
Lauric acidHelps water and oil mix together. Has anti-bacterial properties that might be helpful in preventing blemishes3/5~0.35–0.65%est.
Myristic acidHelps oil and water mix together. Could be comedogenic3/5~0.3–0.55%est.

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Ingredients

Filter by role to see what each ingredient is doing.

Water~45–55%
Formula
Irritation risk
Low

Plain old water

More about Water
Glycerin~4.4–5.4%
Formula
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
Sodium lauroyl isethionate~5.6–6.8%
Formula
Irritation risk
Low
Works for
Cleansing
More about Sodium lauroyl isethionate
Magnesium aluminum silicate~3.1–3.7%
Formula
Irritation risk
Low
Works for
Anti-aging

Might be helpful in restoring skin barrier function and, when combined with zinc carbonate and malonic acid, reducing fine lines and wrinkles by stimulating elastin production. Also helps stabilize the product formulation

More about Magnesium aluminum silicate
Decyl glucoside~2.4–2.9%
Irritant · high
Irritation risk
High
Works for
Cleansing

Helps oil and water mix together. Can be irritating

More about Decyl glucoside
Cocamidopropyl hydroxysultaine~2.3–2.8%
Irritant · medium
Irritation risk
Medium
Works for
Cleansing

Used as a cleansing agent. Helps water and oil mix together

More about Cocamidopropyl hydroxysultaine
Sulfur~1.5–1.8%
Hero · Anti-blemishIrritant · medium
Irritation risk
Medium
Works for
Anti-blemish
More about Sulfur
Sodium lauroyl methyl isethionate~1.5–1.8%
Irritant · medium
Irritation risk
Medium
Works for
Cleansing

Works as a cleansing agent

More about Sodium lauroyl methyl isethionate
Sodium lauroamphoacetate~1.5–1.8%
Formula
Irritation risk
Low
Works for
Cleansing
More about Sodium lauroamphoacetate
Azelaic acid~0.95–1.15%
Hero · Anti-blemish
Irritation risk
Low
Works for
Anti-blemishAnti-oxidationEvens skin toneExfoliation

Is produced by a yeast that lives on normal human skin. It is used in medicine as a topical treatment for mild to moderate acne. It has a mild exfoliating effect. It can also help reduce hyperpigmentation, helps calm down inflammation and can help neutralize free radicals

More about Azelaic acid
Chamomilla recutita flower water~0.65–1%
Formula
Osmanthus fragrans flower extract~0.55–0.85%
Formula
Quartz~0.65–0.95%
Formula
Irritation risk
Low

A mineral. It does not have any confirmed benefit for the skin

More about Quartz
Panthenol~0.45–0.7%
Formula
Irritation risk
Low
Works for
MoisturizingReduces rednessReduces irritation

Helps attract water to the upper layer of the skin and can help improve skin barrier function

More about Panthenol
Bisabolol~0.35–0.65%
Formula
Irritation risk
Low
Works for
Anti-inflammatoryReduces irritationAnti-oxidation

An active component of chamomile plant that historically has been used to calm down irritated skin. A recent study shows that bisabolol indeed can have some anti-inflammatory effect on skin, even though conclusive data is lacking. Bisabolol has a sweet floral scent and can be added to products for its aromatic properties

More about Bisabolol
Aloe barbadensis leaf juice~0.45–0.65%
Irritant · medium
Irritation risk
Medium
Works for
MoisturizingAntibacterialReduces irritationReduces rednessAnti-inflammatoryAnti-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
Centella asiatica extract~0.5–0.7%
Irritant · medium
Irritation risk
Medium
Works for
MoisturizingAnti-inflammatoryReduces rednessReduces irritationAnti-oxidationAnti-agingAnti-blemish

A plant extract that has been shown to be able to reduce inflammation in skin, support restoration of skin barrier function, as well as support collagen production. Contains active compounds called centelloids: asiaticoside, madecasosside, asiatic acid and madecassic acid. Might be helpful in preventing stretch marks. It can be itself be irritating though.

More about Centella asiatica extract
Polyglycerin-6~0.35–0.65%
Irritant · medium
Irritation risk
Medium
Works for
Moisturizing

Helps attract water to the upper layer of the skin

More about Polyglycerin-6
Saccharomyces/zinc ferment~0.3–0.55%
Formula
Irritation risk
Low
Works for
Moisturizing

Yeast extract that contains zinc. Can help to attract water to the upper layer of the skin. Evidence of effectiveness for other benefits is missing

More about Saccharomyces/zinc ferment
Apricot kernel oil polyglyceryl-6 esters~0.35–0.6%
Formula
Irritation risk
Low
Works for
Cleansing
More about Apricot kernel oil polyglyceryl-6 esters
Guaiazulene~0.3–0.5%
Formula
Irritation risk
Low
Works for
Moisturizing

A blue-colored ingredient that is traditionally used as a colorant. It has anti-inflammatory properties. For example, it is successfully used to treat diaper rash for new borns. It can help support the skin barrier by reducing inflammation

More about Guaiazulene
Magnolol~0.3–0.5%
Formula
Irritation risk
Low
More about Magnolol
Honokiol~0.25–0.45%
Formula
Irritation risk
Low
More about Honokiol
Hydrolyzed garcinia mangostana fruit extract~0.25–0.45%
Formula
Lauric acid~0.35–0.65%
Comedogenic 3/5Irritant · medium
Irritation risk
Medium
Comedogenicity
3/5
Works for
CleansingAntibacterialAnti-blemish

Helps water and oil mix together. Has anti-bacterial properties that might be helpful in preventing blemishes

More about Lauric acid
Coconut acid~0.4–0.65%
Formula
Irritation risk
Low
Works for
Cleansing
More about Coconut acid
Myristic acid~0.3–0.55%
Comedogenic 3/5Irritant · medium
Irritation risk
Medium
Comedogenicity
3/5
Works for
Cleansing

Helps oil and water mix together. Could be comedogenic

More about Myristic acid
Acacia senegal gum~0.25–0.5%
Irritant · medium
Irritation risk
Medium

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

More about Acacia senegal gum
Capric acid~0.3–0.6%
Formula
Irritation risk
Low
Works for
Cleansing
More about Capric acid
Xanthan gum~0.25–0.5%
Formula
Irritation risk
Low
Works for
Cleansing

Used to create a thicker product consistency

More about Xanthan gum
Propanediol~0.25–0.5%
Formula
Irritation risk
Low

Acts as a solvent for other ingredients. Speeds up the absorption of other ingredients into the skin

More about Propanediol
Cocamide mipa~0.25–0.45%
Formula
Irritation risk
Low
Works for
Cleansing

Surfactant - foam booster, viscosity increasing agent - aqueous, emulsifying, emulsion stabilising, foam boosting, surfactant, and viscosity controlling. Comes from coconut acid. Doesn't appear to be a common irritant

More about Cocamide mipa
Hydroxyacetophenone~0.25–0.45%
Irritant · medium
Irritation risk
Medium

Used to increase effectiveness of preservatives

More about Hydroxyacetophenone
Octenidine hcl~0.25–0.4%
Formula
Irritation risk
Low
More about Octenidine hcl
Potassium sorbate~0.25–0.4%
Irritant · medium
Irritation risk
Medium

A preservative

More about Potassium sorbate
Sodium benzoate~0.2–0.35%
Formula
Irritation risk
Low

A preservative

More about Sodium benzoate
Sodium chloride~0.2–0.35%
Formula
Irritation risk
Low

Used to stabilize mixtures of oil and water, and create thicker, gel-like product textures

More about Sodium chloride
Sodium polyacryloyldimethyl taurate~0.2–0.35%
Irritant · medium
Irritation risk
Medium

Helps oil and water mix together

More about Sodium polyacryloyldimethyl taurate
Sodium isethionate~0.25–0.45%
Formula
Polyglyceryl-10 oleate~0.15–0.3%
Formula
Irritation risk
Low
Works for
Moisturizing

Helps soften the upper layer of the skin

More about Polyglyceryl-10 oleate
Sorbitan palmitate~0.15–0.3%
Irritant · medium
Irritation risk
Medium
Works for
Cleansing

Helps water and oil mix together and stabilize the product formulation

More about Sorbitan palmitate
Cetyl phosphate~0.15–0.25%
Irritant · medium
Irritation risk
Medium
Works for
Cleansing

Helps oil and water mix together

More about Cetyl phosphate
Potassium hydroxide~0.1–0.2%
Irritant · medium
Irritation risk
Medium

Used to adjust the pH level of products

More about Potassium hydroxide
Citric acid~0.05–0.1%
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

Water, Glycerin, Sodium lauroyl isethionate, Magnesium aluminum silicate, Decyl glucoside, Cocamidopropyl hydroxysultaine, Sulfur, Sodium lauroyl methyl isethionate, Sodium lauroamphoacetate, Azelaic acid, Chamomilla recutita flower water, Osmanthus fragrans flower extract, Quartz, Panthenol, Bisabolol, Aloe barbadensis leaf juice, Centella asiatica extract, Polyglycerin-6, Saccharomyces/zinc ferment, Apricot kernel oil polyglyceryl-6 esters, Guaiazulene, Magnolol, Honokiol, Hydrolyzed garcinia mangostana fruit extract, Lauric acid, Coconut acid, Myristic acid, Acacia senegal gum, Capric acid, Xanthan gum, Propanediol, Cocamide mipa, Hydroxyacetophenone, Octenidine hcl, Potassium sorbate, Sodium benzoate, Sodium chloride, Sodium polyacryloyldimethyl taurate, Sodium isethionate, Polyglyceryl-10 oleate, Sorbitan palmitate, Cetyl phosphate, Potassium hydroxide, Citric acid

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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
PrequelREDNESS REFORM SULFUR CLEANSERYOUR PRODUCTGraydonFace FoamSkinfixAcne+ 2% BHA CleanserBiodermaPigmentbio H2O - Micellar Water
Match—78%76%73%
Price$17.99$39.95+$21.96$10.00−$7.99$16.06−$1.93
Shared key ingredients—2 of 224 of 221 of 22
Key difference—Coco-GlucosideSalicylic AcidHexapeptide-2
Irritancy Medium Low Low Low
Drying alcohol————
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Sources cited in this review

Every concentration estimate and effectiveness label is anchored to one of these 18 studies and safety reviews.

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Prequel REDNESS REFORM SULFUR CLEANSER
PrequelREDNESS REFORM SULFUR CLEANSER

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

As an Amazon Associate, WIMJ earns from qualifying purchases.