Fish oil supplements are widely used by people hoping to support memory and protect their brains as they age. However, a new two-year clinical trial has found that high-dose omega-3 supplements did not produce measurable improvements in memory or protect against brain shrinkage associated with ageing in the group studied.
What the Researchers Found
The study involved 365 adults aged 55 to 80 who were considered at increased risk of developing Alzheimer’s disease. Participants received either a daily supplement containing 2,000 mg of DHA, an omega-3 fatty acid, or a placebo.
After six months, DHA levels in the fluid surrounding the brain and spinal cord had increased among participants taking the supplement. Despite this change, assessments conducted over two years found no significant advantage in memory or thinking skills compared with the placebo group.
Brain scans also showed no clear protective effect against shrinkage of the hippocampus, a region important for memory.
What This Means for Everyday Brain Health
A balanced diet, regular physical activity and adequate sleep remain important parts of maintaining overall health. People who already take fish oil or other supplements should consult a healthcare professional before changing their routine.
