Fish oil 1 g daily plus isotretinoin 10 mg daily controlled acne as well as isotretinoin alone in a 2026 trial. Isotretinoin, a prescription vitamin-A drug that reduces skin oil production, kept similar lesion reduction when paired with fish oil.
The trial enrolled 80 participants ages 18-25 with moderate-to-severe acne and treated them for 3 months, according to the U.S. National Library of Medicine/PubMed record in the PubMed trial record. Participants received low-dose isotretinoin plus either fish oil or placebo under double-masked conditions.
Medical information disclaimer: This article is for general educational purposes only and does not provide medical advice, diagnosis, or treatment. Always consult a physician or other qualified health professional about symptoms, medications, tests, or treatment decisions.
Table of Contents
- What the trial tested
- Did acne improve equally well?
- Skin hydration and triglycerides
- What this means for persistent adult acne
What the trial tested
Researchers compared isotretinoin 10 mg daily plus fish oil 1 g daily against the same isotretinoin dose plus placebo. All participants had moderate-to-severe acne rated IGA 3 or higher at entry.
The study measured total lesion counts, IGA scores, skin biophysics, mucocutaneous effects, triglycerides, and liver transaminases. The MIMS summary reports the authors concluded the combination may preserve hydration and triglyceride control.
Did acne improve equally well?
Acne lesion counts fell in both groups, with fish oil meeting the preset bar for noninferiority. The between-group mean difference was −6.0 lesions, with a 95% confidence interval of −16.5 to 4.5, according to the Journal of the American Academy of Dermatology abstract in the JAAD abstract.
That margin means fish oil did not weaken low-dose isotretinoin for short-term lesion reduction. A separate 2026 omega-3 trial also reported improved acne severity indices and lipid trends with combination treatment.
Skin hydration and triglycerides
The fish-oil group lost less skin hydration during treatment. Corneometer readings, which measure surface moisture, fell less than in the placebo group, as reported by Practical Dermatology in Practical Dermatology's JAAD report.
Triglycerides also rose less in the fish-oil group than in the placebo group, according to the JAAD abstract via PubMed in the same PubMed trial record. That pattern matters because isotretinoin can raise blood lipids while drying skin, lips, eyes, and nose.
What this means for persistent adult acne
These results apply to 3 months of 10 mg isotretinoin in adults ages 18-25. They do not establish long-term clearance, relapse risk, extended safety, or the same effect in older adults with persistent acne.
Because isotretinoin treatment usually requires lipid checks and dryness management, bring supplement questions to the prescribing dermatologist instead of adding fish oil alone. The Australasian College of Dermatologists advises medical supervision for isotretinoin because of dose-dependent dryness and cholesterol and triglyceride effects.
- Ask whether low-dose isotretinoin fits your acne severity and history
- Ask about baseline and follow-up triglyceride and liver testing
- Review fish-oil dose, bleeding risk, and other supplements or drugs
- Report severe dryness, eye irritation, mood changes, or muscle pain promptly
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