Scientists from Tianjin Medical University found that drinking coffee or tea may be associated with a lower risk of stroke and dementia.
They found drinking coffee was also linked to a lower risk of post-stroke dementia.
The research is published in PLOS Medicine and was conducted by Yuan Zhang et al.
Strokes are life-threatening events that cause 10 percent of deaths globally.
Dementia is a general term for symptoms related to declining in brain function and is a global health concern with a high economic and social burden.
Post-stroke dementia is a condition where symptoms of dementia occur after a stroke.
In the study, the team examined 365,682 healthy people aged 50-74 from the UK Biobank. These people were recruited between 2006 and 2010 and followed until 2020.
At the outset participants self-reported their coffee and tea intake. Over the study period, 5,079 participants developed dementia and 10,053 experienced at least one stroke.
The team found people who drank 2-3 cups of coffee or 3-5 cups of tea per day, or a combination of 4–6 cups of coffee and tea had the lowest incidence of stroke or dementia.
People who drank 2-3 cups of coffee and 2-3 cups of tea daily had a 32% lower risk of stroke and a 28% lower risk of dementia compared with those who drank neither coffee nor tea.
Intake of coffee alone or in combination with tea was also associated with a lower risk of post-stroke dementia.
The UK Biobank reflects a relatively healthy sample relative to the general population which could restrict the ability to generalize these associations.
Also, relatively few people developed dementia or stroke which can make it difficult to extrapolate rates accurately to larger populations.
Finally, while it’s possible that coffee and tea consumption might be protective against stroke, dementia and post-stroke dementia, this causality cannot be inferred from the associations.
These findings suggested that moderate drinking of coffee and tea separately or in combination is linked to a lower risk of stroke and dementia.
If you care about stroke, please read studies about what to eat for stroke prevention, and doing this after stroke is critical for long-term survival.
For more information about dementia, please see recent studies about common liver drug that may treat dementia effectively, and results showing that healthy lifestyle can reduce dementia even if you have a family history of the disease.
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