La Roche-Posay Effaclar Duo (+) Dual Action Acne Treatment Ingredients Explained

Name: Effaclar Duo (+) Dual Action Acne Treatment
Brand: La Roche-Posay
Rating: 4.416666666666667 (12 reviews)

4.4 from 12 ratings

Updated on July 20, 2023

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Starts at $22.99

Overview

What it is

Facial treatment with 13 ingredients that contains benzoyl peroxide, exfoliants and Vitamin E

Cool Features

It is fungal acne (malassezia) safe and reef safe

Suited For

It has ingredients that are good for fighting acne, dry skin and brightening skin

Free From

It doesn't contain any harsh alcohols, common allergens, fragrances, oils, parabens, silicones or sulfates

Fun facts

La Roche-Posay is from France. This product is used in 438 routines created by our community.

We independently verify ingredients and our claims are backed by peer-reviewed research. Does this product need an update? Let us know.

Ingredient List (13)

Benzoyl Peroxide 5.5%, Water, Isostearyl Alcohol, Glycerin, Pentylene Glycol, Silica, Carbomer, Capryloyl Salicylic Acid, Potassium Hydroxide, Tocopheryl Acetate, Acrylates/C10-30 Alkyl Acrylate Crosspolymer, Disodium EDTA, Epilobium Angustifolium Flower/Leaf/Stem Extract

You should know

Here's our breakdown of the notable ingredients, benefits, and concerns we determined from the ingredients in this product. Click any item to learn more.

Notable Ingredients

Vitamin E

Exfoliators

Benzoyl Peroxide

Benefits

Hydrating

Acne Fighting

Brightening (2)

Concerns

Drying

Irritating

Rosacea (2)

Eczema (2)

Ingredient Info

Click any item below to learn more and view relevant ingredients.

alcohol-free

silicon-free

fragrance-free

sulfate-free

paraben-free

oil-free

fungal-acne safe

reef-safe

eu-allergen-free

vegan

cruelty-free

Ingredients Overview

Here's our quick-to-read summary of the ingredients in this product. Keep scrolling if you'd like to learn more about what each ingredient does!

Ingredient

Com. / Irr. Rating

Features

Skin Conditioning, Solvent

Emollient, Skin Conditioning

Humectant, Skin Conditioning, Skin Protecting, Solvent

0 / 0

Skin Conditioning, Solvent

Abrasive, Absorbent

Emulsion Stabilising, Gel Forming

1 / 0

Skin Conditioning

Buffering

Antioxidant, Skin Conditioning

0 / 0

Emulsion Stabilising

Skin Conditioning

Ingredients Explained

This product contains 13 ingredients. Click on any ingredient to learn more about it

Benzoyl Peroxide 5.5%

What it does:

Community Rating: Disliked

Benzoyl Peroxide is famous for fighting acne. This is because it does a variety of tasks on the skin: it helps reduce excess oil, kill bacteria, and clear out dead skin cells. In other words, it is effective at unclogging pores.

These properties make it great at fighting different types of acne, including cystic and inflammatory types of acne.

When targeting the bacteria in your pores, Benzoyl Peroxide has been shown to kill the bacteria without causing sensitivity. It also helps keep your skin's natural bacteria and biome balanced. Having a healthy biome protects your skin from external harmful factors.

Once Benzoyl Peroxide is absorbed into the skin, our bodies turn it into benzoic acid and quickly exits in urine.

When using Benzoyl Peroxide, it may be irritating for some people due to a variety of reasons, such as a broken skin barrier or just an allergic reaction. We recommend speaking with a professional about using this ingredient if you have concerns.

Learn more about Benzoyl Peroxide

Water

What it does: Skin Conditioning, Solvent

Community Rating: Loved

Water. It's the most common cosmetic ingredient of all. You'll usually see it at the top of ingredient lists, meaning that it makes up the largest part of the product.

So why is it so popular? Water most often acts as a solvent - this means that it helps dissolve other ingredients into the formulation.

You'll also recognize water as that liquid we all need to stay alive. Talk about multi-purpose! If you see this, drink a glass of water. Stay hydrated!

Learn more about Water

Isostearyl Alcohol

What it does: Emollient, Skin Conditioning

Community Rating: Very Disliked

A type of fatty alcohol. Fatty Alcohols are most often used as an emollient or to thicken a product. They are usually derived from natural fats and oils and therefore do not have the same drying or irritating effect as traditional alcohols.

Glycerin

What it does: Humectant, Skin Conditioning, Skin Protecting, Solvent

Community Rating: Loved

Glycerin is already naturally found in your skin. It helps moisturize and protect your skin.

A study from 2016 found glycerin to be more effective as a humectant than AHAs and hyaluronic acid.

As a humectant, it helps the skin stay hydrated by pulling moisture to your skin. The low molecular weight of glycerin allows it to pull moisture into the deeper layers of your skin.

Hydrated skin improves your skin barrier; Your skin barrier helps protect against irritants and bacteria.

Glycerin has also been found to have antimicrobial and antiviral properties. Due to these properties, glycerin is often used in wound and burn treatments.

In cosmetics, glycerin is usually derived from plants such as soybean or palm. However, it can also be sourced from animals, such as tallow or animal fat.

This ingredient is organic, colorless, odorless, and non-toxic.

Glycerin is the name for this ingredient in American English. British English uses Glycerol/Glycerine.

Learn more about Glycerin

Pentylene Glycol

What it does: Skin Conditioning, Solvent

Community Rating: Mixed

Pentylene glycol is typically used within a product to thicken it. It also adds a smooth, soft, and moisturizing feel to the product. It is naturally found in plants such as sugar beets.

The hydrophilic trait of Pentylene Glycol makes it a humectant. As a humectant, Pentylene Glycol helps draw moisture from the air to your skin. This can help keep your skin hydrated.

This property also makes Pentylene Glycol a great texture enhancer. It can help thicken or emulsify a product. Emulsifiers help stabilize a product. It does this by preventing certain ingredients from separating.

Pentylene Glycol also acts as a mild preservative and helps to keep a product microbe-free.

Some people may experience mild eye and skin irritation from Pentylene Glycol. We always recommend speaking with a professional about using this ingredient in your routine.

Pentylene Glycol has a low molecular weight and is part of the 1,2-glycol family.

Learn more about Pentylene Glycol

Silica

What it does: Abrasive, Absorbent

Community Rating: Disliked

Silica is a mineral naturally found in our skin. It helps to thicken and smooth the texture of a product. It also acts as an agent for other ingredients by increasing the absorption of other ingredients into the skin.

Silica is often used for absorption and can help reduce shine when products are applied. Silica occurs in naturally in materials like clay and sandstone, and it can also be produced synthetically.

Silica is present naturally within the skin during collagen production and when reducing inflammation.

Learn more about Silica

Carbomer

What it does: Emulsion Stabilising, Gel Forming

Community Rating: Disliked

Carbomer is a polymer of acrylic acid. Its main role is to create gel consistency within products.

Carbomer is commonly found in many types of cosmetics products. It is found to be safe in concentrations up to 15%. However, a high amount of carbomer can cause pilling or balling up of products. Most products contain 1% of less of carbomer.

Capryloyl Salicylic Acid

What it does: Skin Conditioning

Community Rating: Liked

We don't have a description for Capryloyl Salicylic Acid.

Potassium Hydroxide

What it does: Buffering

Community Rating: Very Disliked

Potassium hydroxide is commonly known as caustic potash. It is used to fix the pH of a product or as a cleaning agent in soap. In cleansers, it is used for the saponification of oils.

Sapnification is the process of creating fatty acid metal salts from triglycerides and a strong base. During this process, Potassium Hydroxide is used up and is not present in the final product.

Using high concentrations of Potassium Hydroxide have shown to irritate the skin.

Learn more about Potassium Hydroxide

Tocopheryl Acetate

What it does: Antioxidant, Skin Conditioning

Community Rating: Liked

Tocopheryl Acetate is AKA Vitamin E. It is an antioxidant and protects your skin from free radicals. Free radicals damage the skin by breaking down collagen.

One study found using Tocopheryl Acetate with Vitamin C decreased the number of sunburned cells.

Tocopheryl Acetate is commonly found in both skincare and dietary supplements.

Learn more about Tocopheryl Acetate

Acrylates/C10-30 Alkyl Acrylate Crosspolymer

What it does: Emulsion Stabilising

Community Rating: Very Disliked

Acrylates/C10-30 Alkyl Acrylate Crosspolymer is a synthetic polymer. It is used to thicken and improve the texture of products.

Acrylates/C10-30 Alkyl Acrylate Crosspolymer is also an emulsifier. Due to its properties, it can prevent water and oil ingredients from separating.

Disodium EDTA

What it does:

Community Rating: Disliked

Disodium EDTA plays a role in making products more stable by aiding other preservatives.

It is a chelating agent, meaning it neutralizes metal ions that may be found in a product.

Disodium EDTA is a salt of edetic acid and is found to be safe in cosmetic ingredients.

Learn more about Disodium EDTA

Epilobium Angustifolium Flower/Leaf/Stem Extract

What it does: Skin Conditioning

We don't have a description for Epilobium Angustifolium Flower/Leaf/Stem Extract.

Embed Ingredients

Here's what our community thinks of the 13 ingredients in this product ✨

31% are loved or liked

8% have mixed ratings

54% are disliked or very disliked

8% have no rating yet

When to use

We've created a guide with info on when you should use La Roche-Posay Effaclar Duo (+) Dual Action Acne Treatment. We've also included some recommended products to use it with, as well as some routine inspiration!

Read our guide on when to use Effaclar Duo (+) Dual Action Acne Treatment ->

Verified by SkinSort

We're dedicated to providing you with the most up-to-date and science-backed ingredient info out there.

The data we've presented on this page has been verified by a member of the SkinSort Team.