Fish oil is one of the most popular dietary supplements among older adults.
Many people use it in the hope of protecting their memory and reducing the risk of diseases such as Alzheimer’s.
Researchers have therefore spent several years investigating whether omega-3 fatty acids from fish oil can help the brain stay healthy for longer.
A two-year study
A new study, published in the journal EBioMedicine, followed 365 people between the ages of 55 and 80 who were at increased risk of developing Alzheimer’s disease.
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Participants received either a daily omega-3 supplement or a placebo for two years, according to HealthDay.
Researchers first wanted to determine whether DHA, an important omega-3 fatty acid, actually reached the brain.
Measurements showed that DHA levels increased by around 17 percent after six months.
Testing the brain
The researchers then examined participants’ memory and brain function through cognitive tests and brain scans.
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The results showed no measurable benefit for those who took fish oil.
There were no improvements in memory or cognitive abilities compared with the group that received a placebo.
The study also found that the development of brain regions associated with Alzheimer’s disease was not affected.
What does it mean?
Although the omega-3 fatty acids reached the brain, researchers found no evidence that fish oil could protect against Alzheimer’s disease.
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The study therefore suggests that fish oil alone is not an effective method of preventing the most common form of dementia.
Instead, the researchers emphasize that regular exercise, good sleep, and a healthy diet remain among the most important factors in reducing the risk of the disease.
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