Millions of Americans take fish oil supplements in hopes of keeping their brains sharp as they age. But new facts It suggests that these capsules may not provide the cognitive boost that many expect.
A two-year clinical trial followed 365 adults aged 55 to 80 who were at risk for Alzheimer’s disease. Participants received either a high-dose omega-3 supplement or a daily placebo.
The researchers first wanted to know if the main omega-3 nutrient, DHA, actually reaches the brain.
So they measured DHA levels in the surrounding fluid and found an increase of about 17% after six months of treatment.
But in terms of results, this did not translate into better results.
Memory tests and brain scans have shown no benefit for those taking fish oil supplements.
According to the results, participants who received DHA did not see any improvement in memory or cognitive function, and the supplements did not slow the decline in brain regions associated with Alzheimer’s disease.
Researchers say the findings suggest that fish oil supplements alone are unlikely to prevent the most common form of dementia.
“Staying healthy throughout life is the most powerful tool we have to reduce the risk of Alzheimer’s, including regular exercise, quality sleep and a balanced diet,” says the lead investigator.
Source: eBioMedicine
Author affiliation: Keck Medicine from USC
