ingestible · for adhd & focus
Omega-3 Fatty Acids (EPA/DHA)
Reviewed by the Nimbera editorial team · Last updated May 2026
How to use
Take 1,000-2,000 mg combined EPA + DHA daily with a meal that contains fat to improve absorption. Choose a product that specifies EPA and DHA content separately on the label. Allow at least 3-4 months of consistent use before evaluating effect, as shorter trials showed no benefit in the meta-analysis. Refrigerate opened bottles to prevent oxidation.
How it works
EPA and DHA are structural components of neuronal cell membranes and influence dopaminergic and serotonergic signaling pathways implicated in attention regulation; people with ADHD have consistently lower blood levels of omega-3s than controls.
Where to buy
Pharmacies, health food stores, and online retailers. Look for third-party tested products (NSF, USP, or IFOS certified). Nordic Naturals, Carlson, and Thorne are commonly recommended brands.
Typical cost: $20-40/month
Safety notes
High doses above 3 g/day may mildly inhibit platelet aggregation - use caution if you take warfarin, aspirin, or other anticoagulants, and inform your prescriber. Fish oil can cause fishy burp or mild GI upset; enteric-coated capsules reduce this. Avoid if you have a fish or shellfish allergy (algae-based DHA is an alternative). Omega-3 does not interact meaningfully with stimulant ADHD medications at standard doses, but discuss with your prescriber before combining.
Drug & supplement interactions
- Always tell your doctor or pharmacist about any supplements you take.
- Interactions can occur with prescription medications, blood thinners, and immunosuppressants.
- Herbal remedies can affect how the body absorbs or metabolises drugs.
- Check drugs.com interactions checker before starting.
Clinical source
Liu et al., J Clin Psychiatry 2023This information is compiled from primary clinical literature and is for informational purposes only. It is not a substitute for professional medical advice. Read our full disclaimer.