Effaclar Duo Dual Action Acne Spot Treatment
What it's good for
Key actives from our research database. Click any to read the full evidence dossier.
Kills the bacteria that cause inflammatory acne. The first thing to reach for when you have red, painful pimples.
Good for: Anti-acne
A multitasker that calms redness, evens out skin tone, and helps oily skin balance out. One of the safest do-a-little-of-everything ingredients.
Good for: Brightening, Barrier repair, Anti-inflammatory
Evidence behind the ingredients
Real citations from our research database, one per tracked active in this product. Click any ingredient name to read its full evidence dossier.
Kills the bacteria that cause inflammatory acne. The first thing to reach for when you have red, painful pimples.
Barbieri JS et al. Benzoyl Peroxide-Containing Products and Benzene: Where Are We Now After Recalls, and How Should We Move Forward? JAMA Dermatology. 2025;161(8). doi:10.1001/jamadermatol.2025.1694 — Viewpoint examining benzene formation risk in benzoyl peroxide products following product recalls; discusses monitoring and regulatory considerations for BPO safety.
Barbieri JS et al. The Role of Formulation in Benzene Formation in Benzoyl Peroxide Products. JAMA Dermatology. 2025;161(4). doi:10.1001/jamadermatol.2024.6443 — Quality improvement study examining how OTC benzoyl peroxide product formulation characteristics affect detected benzene concentration levels.
Huang CY et al., Comparative Efficacy of Pharmacological Treatments for Acne Vulgaris: A Network Meta-Analysis of 221 Randomized Controlled Trials, Annals of Family Medicine 2023;21(4):358-369 — BPO combinations among most effective topical regimens for acne
A multitasker that calms redness, evens out skin tone, and helps oily skin balance out. One of the safest do-a-little-of-everything ingredients.
Moro F et al., Skin Cancer Prevention and Antiaging: Role of Nicotinamide, International Journal of Molecular Sciences 2026
Passeron T et al., An Investigator-Blinded, Randomized Trial of a Broad-Spectrum Sunscreen Containing Sclareolide and Niacinamide, Dermatology and Therapy (Heidelberg) 2026
Vergilio MM et al., Topical Formulation with Niacinamide Combined with 5 MHz Ultrasound for Improving Skin Ageing, Current Medicinal Chemistry 2025
Sources: 10 clinical journals and regulatory databases across the US, EU, Korea, Japan, and China. Every entry points to a specific document. See methodology for the full list and what each outcome label means.
Layering conflicts
Ingredients in this product that can react with common actives. Avoid stacking unless noted.
- Vitamin Cmedium
Benzoyl peroxide breaks down vitamin C, making both less effective. Use one in the morning and the other at night.
- Retinolmedium
Benzoyl peroxide can break down retinol. Use one in the morning and the other at night, or pick a stabilized formula made to combine them.
- Tretinoinmedium
Benzoyl peroxide breaks down tretinoin unless they're in a stabilized formula made to combine them. Use one in the morning and the other at night.
Similar comparisons
Not medical advice. GlowPal is educational. Patch-test new products and talk to a qualified healthcare professional before changing your routine, especially if you're pregnant, nursing, or have a diagnosed skin condition. See our terms.