Written based on 2 research studies on Alzheimer s & Dementia, searched on 2026. nov. 14..
The claim
Posts online say that omega-3 fatty acids (fish oil) helps with Lewy body dementia.
Where research stands
We found it only in Alzheimer s & Dementia, and they say: A 2020 study in people with memory and thinking problems, including three with Lewy body dementia, added an omega-3 drink (with antioxidants and resveratrol) to their usual dementia medicine; the abstract reports better immune clearing of amyloid and daily activities in the short term, but the three Lewy body patients are not reported on separately. [2] A 2019 lab and clinical study on mild cognitive impairment (an early memory problem) found that omega-3 helped immune cells clear amyloid, a protein linked to Alzheimer's disease; it did not look at Lewy body dementia. [1]
We searched for omega 3, omega-3, fish oil, eicosapentaenoic acid, docosahexaenoic acid, icosapent ethyl together with Lewy body dementia.
Verdict
No study we found shows that this claim is true.
Unproven means: it was only tested in animals or cells, or there is too little or mixed data from people. How we rate claims
What this means for you: A study in people is not proof that it helps you. Do not stop or change your medicines because of it. Ask your doctor before you start taking it.
Sources
- P2‐001: MITOCHONDRIAL ENERGY FROM OMEGA‐3 FOR AMYLOID‐BETA PHAGOCYTOSIS2019 · Alzheimer s & Dementia · Study in people
- Omega‐3 fatty acid add‐on nutritional immunotherapy delays progression to dementia in MCI patients on cholinesterase therapy: Human/Human trials: Nutraceuticals and non‐pharmacological interventions2020 · Alzheimer s & Dementia · Study in people
