Dubai – Qahwa World
A comprehensive new study suggests that regular consumption of caffeinated coffee and tea may help protect against dementia and support cognitive health over the long term.
The research, published in JAMA on February 9, 2026, analyzed data from over 131,000 participants followed for up to 43 years. The study included women from the Nurses’ Health Study and men from the Health Professionals Follow-up Study, excluding individuals who had cancer, Parkinson’s disease, or dementia at the start. During the follow-up period, 11,033 cases of dementia were documented.
The study found that higher intake of caffeinated coffee was linked to a significantly lower risk of developing dementia. Participants in the highest consumption group—roughly two to three cups per day—experienced about an 18% lower risk compared with those in the lowest intake group. Similarly, moderate tea consumption—one to two cups per day—was associated with comparable benefits. Decaffeinated coffee, however, showed no significant impact on dementia risk or cognitive function.
You may like: Black coffee without sugar reduces chronic inflammation
Researchers also observed improvements in cognitive performance among caffeinated coffee and tea drinkers. In the Nurses’ Health Study cohort, higher coffee intake correlated with slightly higher scores on the Telephone Interview for Cognitive Status and global cognition assessments. Subjective cognitive decline was also less common among those with moderate caffeinated beverage intake.
Dr. Dylan Wint, a neurologist at Cleveland Clinic, who was not involved in the study, noted that these findings reinforce the potential role of caffeine in brain health. “Caffeine may help reduce the accumulation of amyloid-beta, a protein implicated in Alzheimer’s disease, and it may also have other neuroprotective effects,” he explained.
While the study highlights promising associations, researchers and experts caution that more work is needed to confirm causality. Dr. Wint emphasized that maintaining brain health also requires a holistic approach, including a balanced diet, regular exercise, and mental engagement.
The study adds to a growing body of evidence that moderate consumption of caffeinated coffee and tea could be a simple, enjoyable strategy to support long-term cognitive health.
