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Cognitive fitness Archive

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Harvard study: Six healthy diets linked with better long-term brain health

A Harvard study of over 159,000 people found that following any of six healthy diets-especially the DASH diet-was linked to significantly better cognitive function in later life, with the strongest benefits seen in those who were following a healthy diet in middle age.

Helping with grandchildren may stave off cognitive decline

A 2026 study suggested that helping care for grandchildren can offer cognitive benefits, helping older adults maintain stronger memory and language skills. Grandmothers who helped with childcare-related tasks also showed less overall cognitive decline over time than non-caregiving peers.

Gum disease may increase the risk for stroke and cognitive decline

A 2025 study found that in brain MRI scans, people with any evidence of gum disease were more likely to have higher amounts of a marker for disease in the brain's small blood vessels, compared to people without gum disease.

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