A large-scale Harvard-based study has determined that regular consumption of blueberries may be linked to slower cognitive aging and improved brain health in older adults.
Researchers analyzing long-term data from more than 16,000 women in the Nurses’ Health Study found that those with higher intake of blueberries and strawberries experienced significantly slower rates of cognitive decline compared to those who consumed little or none.
The difference was substantial enough to correspond to a level of brain function typically seen in individuals about 3 years younger, suggesting a measurable protective effect on age-related mental decline.
Scientists attribute this benefit to compounds found in blueberries, particularly anthocyanins and other flavonoids. These antioxidants can cross the blood-brain barrier and are believed to reduce oxidative stress and inflammation.
They may also support improved blood flow in the brain and enhance communication between neurons, particularly in areas involved in memory such as the hippocampus.
Separate randomized clinical trials have supported these findings. Older adults who consumed the equivalent of about one cup of blueberries daily for several weeks showed improvements in memory performance, executive function, and processing speed compared to placebo groups.
Blueberries are not a cure for aging-related cognitive decline, but regular intake may offer modest but meaningful neuroprotective benefits over time.
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