Researchers from China and the US found that people who drank two to three cups of tea and coffee a day had a lower risk of stroke and vascular dementia. Findings are published today (Tuesday 16 November) in the journal PLOS Medicine.
What did the scientists do?
This research involved volunteers from an existing large study, the UK Biobank, who were followed up over a period of 10-14 years. In total 365,682 participants, aged between 50 and 74, took part in the research.
Participants self-reported their tea and coffee drinking habits at the beginning of the study. Researchers then recorded the numbers of people who went on to have a stroke (2.8%) or develop Alzheimer’s disease or vascular dementia (1.4%).
What did the scientists find?
People who drank two to three cups of coffee with two to three cups of tea per day had around 30% lower risk of stroke and dementia when compared to those who didn’t consume either. This association was found for people who just drank either tea or coffee, as well as those who drank both.
People who had the lowest risk of developing dementia or stroke either:
- Had two to three cups of coffee a day.
- Had three to five cups of tea a day.
- Had a combination of four to six cups of tea and coffee a day.
Researchers in this study found that drinking tea and coffee was linked to a lower risk of having an ischaemic stroke (caused by a blocked blood vessel) and vascular dementia, rather than a haemorrhagic stroke (caused by a burst blood vessel) or Alzheimer’s disease.
Release date: 16 November 2021
Source: Alzheimer’ s Research