Jan Marini Skin Research, Inc. Benzoyl Peroxide 2.5% Wash

Jan Marini Skin Research, Inc.

Jan Marini Skin Research, Inc. Benzoyl Peroxide 2.5% Wash

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About this product

The Jan Marini Skin Research, Inc. Benzoyl Peroxide 2.5% Wash is a misc. Our analysis of its 14 ingredients (10 low-risk) rates it Excellent (83/100). Based on its ingredients, it looks well-suited to oily / acne-prone and dry skin.

Vegan-friendly Reef-safe

Summarised from our ingredient analysis — not brand marketing copy.

At a glance

Type
Misc
Ingredients
14
Low-risk
10
Fragrance
Fragrance-free
Origin
United States

The evidence

Quick Product Notes

Paraben-Free Sulfate-Free Alcohol-Free Silicone-Free EU Allergen-Free Fungal Acne (Malassezia) Safe Minimal Ingredients

Notable Effects & Ingredients

No Notable Effects & Ingredients

Ingredients Related to Skin Types

Good   Bad — tap a skin type to see which ingredients · estimated from ingredient functions
Dry Skin 5/5
Good for dry skin
Cetyl Alcohol Sorbitol Stearyl Alcohol Glycerin Propylene Glycol
Caution for dry skin
Cetyl Alcohol Stearyl Alcohol Ammonium Lauryl Sulfate Glycerin Triethanolamine
Oily/Acne-Prone Skin 1/0
Good for oily/acne-prone skin
Benzoyl Peroxide
Sensitive Skin 1/8
Good for sensitive skin
Glycerin
Caution for sensitive skin
Cetyl Alcohol Sorbitol Stearyl Alcohol Glycerin Propylene Glycol Methylparaben Triethanolamine Propylparaben

Ingredients list

14 total
Lower hazard (1) Higher hazard (7)
All14 Fragrance8 Humectant6 Emulsion Stabilising6 Viscosity Controlling5 Viscosity Increasing Agent5 Surfactant4 Masking3 Foam Boosting3
EWG CIR Ingredient Name & Cosmetic Functions Notes
3
Benzoyl Peroxide
(Antiacne Agent, Oxidising Agent)
1
Water
(Solvent)
1
Sorbitol
(Flavoring Agent, Fragrance, Humectant, Plasticizer, Skin Conditioning)
1
A
Cetyl Alcohol
(Emulsion Stabilising, Fragrance, Opacifying, Emulsifying, Surfactant, Foam Boosting, Viscosity Increasing Agent, Emollient, Masking, Viscosity Controlling)
1
A
Stearyl Alcohol
(Emulsion Stabilising, Fragrance, Emulsifying, Surfactant, Foambooster, Viscosity Increasing Agent, Emollient, Foam Boosting, Masking, Opacifying, Refatting, Viscosity Controlling)
3
B
Propylene Glycol
(Fragrance, Humectant, Skin Conditioningagent Miscellaneous, Solvent, Viscosity Decreasing Agent, Skin Conditioning, Viscosity Controlling)
Good for Dry Skin
Good for Dry Skin
1
B
Ammonium Lauryl Sulfate
(Cleansing, Foaming, Surfactant)
Sulfate
Sulfate
2
A
Glycerin
(Denaturant, Fragrance, Hair Conditioning, Humectant, Oral Care Agent, Oral Health Care Drug, Skin Protecting, Viscosity Decreasing Agent, Perfuming, Solvent)
Good for Dry Skin
Good for Dry Skin
Fungal Acne
Fungal Acne Trigger
1
A
Carbomer
(Emulsion Stabilising, Viscosity Increasing Agent, Gel Forming, Viscosity Controlling)
5
B
Triethanolamine
(Fragrance, Ph Adjuster, Emulsifying, Surfactant, Buffering Agent, Masking)
1
A
Disodium EDTA
(Chelating Agent, Viscosity Controlling)
6
B
Diazolidinyl Urea
(Preservative)
4
A
Methylparaben
(Fragrance, Preservative)
Paraben
Paraben
7
A
Propylparaben
(Fragrance, Preservative, Perfuming)
Paraben
Paraben

My Ingredient Notes

No personal ingredient notes yet. Save ingredients to your profile to get good/bad alerts here.

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Key ingredients

Sorbitol
Humectant, Skin Conditioning
Cetyl Alcohol
Emollient
Stearyl Alcohol
Emollient
Propylene Glycol
Humectant, Skin Conditioning
Glycerin
Humectant, Skin Protecting

Benefits

Good for oily/acne-prone skin

Concerns

Contains paraben
Contains sulfate
Not fungal acne (malassezia) safe
Propylparaben — higher EWG
May not suit sensitive skin

EWG flags hazard, not real-world risk — ratings don't account for how much of an ingredient a product contains. Treat these as things to research, not verdicts. How we score →

Ingredients explained

Benzoyl Peroxide
Antiacne agent, Oxidising agent
Low-to-moderate hazard.Read moreShow less
EWG 3 Antiacne agentOxidising agent
Water
Solvent
Low-hazard ingredient.Read moreShow less
EWG 1 Solvent
Sorbitol
Flavoring agent, Fragrance
Low-hazard ingredient.Read moreShow less
EWG 1 Flavoring agentFragranceHumectantPlasticizerSkin conditioning
Cetyl Alcohol
Emulsion stabilising, Fragrance
Low-hazard ingredient.Read moreShow less
EWG 1 CIR A Emulsion stabilisingFragranceOpacifyingEmulsifyingSurfactantFoam boostingViscosity increasing agentEmollientMaskingViscosity controlling
Stearyl Alcohol
Emulsion stabilising, Fragrance
Low-hazard ingredient.Read moreShow less
EWG 1 CIR A Emulsion stabilisingFragranceEmulsifyingSurfactant- foamboosterViscosity increasing agentEmollientFoam boostingMaskingOpacifyingRefattingViscosity controlling
Carbomer
Emulsion stabilising, Viscosity increasing agent
Low-hazard ingredient.Read moreShow less
EWG 1 CIR A Emulsion stabilisingViscosity increasing agentGel formingViscosity controlling
Disodium EDTA
Chelating agent, Viscosity controlling
Low-hazard ingredient.Read moreShow less
EWG 1 CIR A Chelating agentViscosity controlling
Propylene Glycol
Fragrance, Humectant
Low-to-moderate hazard.Read moreShow less
EWG 3 CIR B FragranceHumectantSkin-conditioningagent - miscellaneousSolventViscosity decreasing agentSkin conditioningViscosity controlling Good for Dry Skin
Ammonium Lauryl Sulfate
Cleansing, Foaming
Low-hazard ingredient.Read moreShow less
EWG 1 CIR B CleansingFoamingSurfactant Sulfate
Glycerin
Denaturant, Fragrance
Low-hazard ingredient.Read moreShow less
EWG 2 CIR A DenaturantFragranceHair conditioningHumectantOral care agentOral health care drugSkin protectingViscosity decreasing agentPerfumingSolvent Good for Dry SkinFungal-acne trigger
Triethanolamine
Fragrance, Ph adjuster
Moderate-hazard ingredient.Read moreShow less
EWG 5 CIR B FragrancePh adjusterEmulsifyingSurfactantBuffering agentMasking
Diazolidinyl Urea
Preservative
Moderate-hazard ingredient.Read moreShow less
EWG 6 CIR B Preservative
Methylparaben
Fragrance, Preservative
Low-to-moderate hazard.Read moreShow less
EWG 4 CIR A FragrancePreservative Paraben
Propylparaben
Fragrance, Preservative
Higher-hazard ingredient.Read moreShow less
EWG 7 CIR A FragrancePreservativePerfuming Paraben

How to use

How to use

  • 1 Evening, start slow: Best in the PM a few times a week to begin with; avoid layering with other strong actives the same night.
  • 2 Wear SPF the next day: Acids and retinoids increase sun sensitivity — daily sunscreen is a must while using this.

General guidance from this product's category and active ingredients — always follow the directions on the package.

Trust & honesty

Pregnancy & breastfeeding

Contains ingredients some choose to avoid or double-check while pregnant or nursing.

Ask your doctor
Benzoyl Peroxide (Benzoyl Peroxide)

Often considered acceptable for limited spot use, but many clinicians prefer you check first.

This is general information, not medical advice. Pregnancy guidance varies and depends on concentration and your individual situation — always check with your doctor, midwife or pharmacist. How we flag this.

Effective levels — general guide

The concentrations these actives are typically effective at in research — not a measurement of this product.

Benzoyl Peroxide 2.5–10% (OTC)

Lower strengths (2.5–5%) work about as well as 10% for many people, with less dryness and irritation.

Benzoyl Peroxide

INCI lists don't disclose amounts, and we don't claim to know this product's levels — these are the ranges these ingredients are usually effective at, so you can tell a real formula from "fairy-dusting" a marketed active. How we estimate this.

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