00:00A two-year study found that fish oil did not improve memory in older adults.
00:04Researchers at Keck Medicine of USC tested 365 adults aged 55 to 80.
00:10All rarely ate fish and were at higher risk for Alzheimer's disease.
00:15About 47% carried the APOE4 gene variant.
00:18Participants took 2,000 milligrams of DHA, an omega-3 fatty acid, every day.
00:24After six months, DHA in spinal fluid had risen by an average of 17%.
00:29So the supplement did reach the brain.
00:31But memory and thinking scores were no better than with a placebo.
00:35It also did not prevent shrinkage in the hippocampus, a key memory area.
00:40The lead researcher said the results do not support fish oil supplements as a preventive measure.
00:45Researchers suggest omega-3s may work better within a broader diet, such as a Mediterranean-style pattern.
00:52But that idea was not tested in this trial.
00:54Disclosure.
00:55This video contains stock footage and content created or enhanced using AI-assisted tools.
