Midlife DASH Diet Linked to 41% Lower Cognitive Decline

Recent studies have revealed that adhering to healthy eating patterns, particularly in midlife, can significantly lower the risk of cognitive decline and dementia, with the DASH diet showing the strongest protective effects among several analyzed approaches.

A large-scale analysis published in JAMA Neurology tracked more than 159,000 adults over up to 30 years, drawing from cohorts like the Nurses' Health Study and the Health Professionals Follow-up Study. Researchers found that those who most closely followed the DASH diet, which emphasizes fruits, vegetables, whole grains, lean proteins, fish, and low-fat dairy while limiting salt, red meat, and processed foods, faced a 41 percent lower risk of self-perceived cognitive decline compared to those with the least adherence. This benefit was most pronounced for participants in their 40s and 50s, equivalent to slowing cognitive aging by nearly a year in objective tests among older women. Similar patterns emerged across five other healthy diets, including the MIND diet—a hybrid of DASH and the Mediterranean diet tailored for brain health—though DASH demonstrated the clearest link.

The MIND diet, which prioritizes leafy greens,...