Effaclar Duo Dual Action Acne Treatment
Dual-action acne moisturiser with benzoyl peroxide and LHA.
About this product
La Roche-Posay Effaclar Duo is a dual-action acne moisturiser that combines benzoyl peroxide with LHA (lipo-hydroxy acid, a salicylic acid derivative) to attack acne from two angles: killing acne bacteria and exfoliating dead skin cells that block pores. It also contains niacinamide to reduce post-acne marks and is oil-free, non-comedogenic, and fragrance-free.
Best for oily, combination skin looking to address acne, blackheads, post-acne marks — with a focus on acne control.
Routine Placement
Apply this cleanser as step 1 in your routine.
Product Attributes
pH Level
Mildly acidic — close to skin's natural pH (4.5–5.5). Generally well tolerated.
How to Use
- 1Apply a small amount to clean skin, morning and evening.
- 2Focus on blemish-prone areas.
- 3Allow to absorb before applying moisturizer.
- 4Avoid the eye area.
- 5Follow with SPF in the morning.
Patch Test Recommended
This product contains high-strength actives. Before full application, apply a small amount to your inner arm or jaw and wait 24 hours to check for irritation.
If you experience redness, burning, or itching — discontinue use and consult a dermatologist.
Dermatologist Note
Combines 5.5% benzoyl peroxide (antibacterial) with lipo-hydroxy acid (LHA, a gentle BHA derivative) for a dual-action approach to acne. Clinical trials showed significant reduction in inflammatory and non-inflammatory lesions at 12 weeks. The LHA concentration is mild enough to use daily without significant irritation for most acne-prone skin types.
Based on published clinical literature and dermatological research.
Ingredient Analysis
Full Ingredient List (INCI)
4 ingredientsListed in order of concentration (highest first)
Benzoyl Peroxide, Salicylic Acid, Niacinamide, Glycerin
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