Higher omega-3 intake in midlife is linked to a healthier brain structure. In a new study, people with more omega-3 had a larger hippocampus and better brain function. That may lower the risk of Alzheimer’s later in life, a disease no drug can cure.
Summary: Alzheimer’s is one of the most common brain-wasting disorders. No drug can cure it. A new study shows that high omega-3 intake at a young age can improve brain function and enlarge the hippocampus (the brain’s memory center). So higher omega-3 intake when young may help lower the risk of Alzheimer’s later in life and improve mental health.
As people live longer, brain disorders keep rising. There are many brain-wasting disorders, but Alzheimer’s is a special worry. Already 6.5 million Americans live with it, and the number is expected to keep rising.
Right now, no drug can prevent or reverse Alzheimer’s. Medicines for Alzheimer’s can only slow it down.
More than a century of research has not told us enough about the disease. Studies show people are more likely to be diagnosed after age 65, though some are diagnosed earlier.
Still, studies do give some useful facts. Alzheimer’s seems to start long before it is diagnosed. Symptoms show up only after a lot of damage is done. So any step to lower Alzheimer’s risk must start early.
Doctors cannot reliably judge Alzheimer’s risk in every patient. But studies show a strong link with genes. For example, people who carry the APOE4 gene are at real risk of Alzheimer’s later in life. So they can start working to prevent it early, even with no symptoms.
Many brain-boosting supplements can sharpen brain functions. But it is unclear which supplements truly lower Alzheimer’s risk. Now a new study gives solid evidence that high omega-3 intake may be linked to better brain health and may help lower Alzheimer’s risk.
It is no secret that omega-3 fatty acids are good for the brain. Of the three omega-3 fatty acids, docosahexaenoic acid (DHA) and eicosapentaenoic acid (EPA) are especially good for brain health. Many clinical studies show they help the brain develop, greatly improve metabolic health and boost many brain functions.
Now a new study shows that the benefits of omega-3 can even be seen on brain scans. People with high omega-3 intake have a visibly larger hippocampus, the part of the brain tied to memory and learning.
A study of 2,183 healthy people with no dementia or stroke found that starting omega-3 fatty acids in middle age may significantly lower the risk of brain-wasting disorders. Omega-3 may also help high-risk people, like those with the APOE4 gene variant.
In the study, researchers saw a larger hippocampus with higher omega-3 intake. Omega-3 fatty acids also helped improve reasoning and other brain functions. On top of that, omega-3 helped the small blood vessels in the brain work better.
Researchers split people into two groups. One had very low omega-3 levels in their blood cells. The other had fairly high omega-3 levels in their blood.
Most of the benefits above showed up only in people with high omega-3 levels in their blood cells. This is the first study to show such a link between high omega-3 intake and brain health in young adults.
Clearly, people with healthier brains in middle life are also less likely to get Alzheimer’s. So higher omega-3 intake matters most for high-risk people.
Omega-3 may not reverse Alzheimer’s and may help little once someone has it. But omega-3 fatty acids help more when intake rises well before the disease starts.
So low omega-3 levels in the blood cells should be seen as a risk factor for Alzheimer’s that you can change.
Frequently asked questions
Is omega-3 good for your brain?
Yes. A study looked at 2,183 healthy adults free of dementia and stroke. People with higher omega-3 levels had a larger hippocampus, the part of the brain tied to memory and learning. They also reasoned better and had healthier small blood vessels in the brain. Those benefits showed up mainly in people with high omega-3 levels in their blood cells.
Which omega-3 is best for brain health, DHA or EPA?
Both. Of the three omega-3 fatty acids, docosahexaenoic acid (DHA) and eicosapentaenoic acid (EPA) matter most for the brain. Clinical studies show they help the brain develop, improve metabolic health and boost a range of brain functions. The new study shows those benefits can now be seen directly on brain scans.
Can omega-3 prevent Alzheimer’s disease?
Omega-3 works best as prevention, not treatment. It may not reverse Alzheimer’s and helps little once someone has the disease. When intake rises well before the disease starts, higher omega-3 builds a healthier brain in middle life. A healthier brain in middle life is less likely to develop Alzheimer’s. Low omega-3 in the blood is a risk factor you can change.
When should you start taking omega-3 for brain health?
In middle age, or earlier. Alzheimer’s starts long before it is diagnosed. Symptoms appear only after a lot of damage is done, so any effort to lower the risk has to start early. People who carry the APOE4 gene face a real risk of Alzheimer’s later in life. They have the most reason to start before they have any symptoms.
Related reading
Targeting Metabolic Disorders to Overcome Alzheimer's · Blood-Brain Barrier and Neurological Disorders · How Exercise Helps Prevent Neurodegeneration · Drug Addiction Treatment, St. Louis
Are Opioids Helpful In Mental Health Improvement
Some people have a history of drug addiction or alcohol dependence. For them, doctors might prescribe alcohol dependence treatment and addiction treatment programs while managing Alzheimer’s symptoms. These can also include suboxone treatment and opioid addiction treatment to improve mental health.
Sources
- Satizabal CL, Himali JJ, Beiser AS, et al. Association of Red Blood Cell Omega-3 Fatty Acids With MRI Markers and Cognitive Function in Midlife: The Framingham Heart Study. Neurology. 2022;99(23):e2572-e2582. PMID 36198518 · DOI 10.1212/WNL.0000000000201296.