Reported by ScienceDaily
Your daily cup of coffee may be doing more than helping you wake up in the morning. A long-running study of U.S. adults suggests that drinking caffeinated coffee regularly is associated with a substantially lower risk of dementia and better cognitive health as people age.
Researchers found that adults who consumed higher amounts of caffeinated coffee developed dementia at considerably lower rates than those who rarely or never drank it. The findings were based on follow-up periods extending as long as 43 years, offering a valuable look at how everyday drinking habits relate to brain health over time.
The strongest associations appeared among people who drank two to three cups of caffeinated coffee each day. Tea consumption was also linked to better cognitive outcomes, although the amount associated with the greatest benefit was somewhat lower.
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Interestingly, decaffeinated coffee did not show the same benefits, raising questions about whether caffeine itself might help explain the connection.
One of the most striking findings involved the difference in dementia rates between regular coffee drinkers and people who consumed little or no coffee.
Among U.S. adults who drank higher amounts of caffeinated coffee, researchers recorded 141 dementia cases annually for every 100,000 people. In comparison, the rate was 330 cases per 100,000 people each year among those who rarely or never drank caffeinated coffee.
Dementia is a general term for conditions that progressively interfere with memory, thinking, reasoning, and the ability to perform everyday activities. Alzheimer's disease is its most common cause, although several other brain disorders can also lead to dementia.
While occasional forgetfulness can be a normal part of aging, dementia involves cognitive difficulties severe enough to disrupt daily life. Identifying lifestyle habits associated with lower dementia risk is therefore an important area of research, particularly as populations grow older.
The findings suggest that regular caffeinated coffee consumption may be one such habit. However, the results show an association rather than proving that coffee directly prevents dementia. Other differences between coffee drinkers and people who avoid coffee could also contribute to the observed results.
The potential benefits were not limited to diagnosed…