Nutritional Advice El MondoObjectives:
Lifestyle interventions are an important and viable approach for preventing cognitive deficits. However, the results of studies on alcohol, coffee and tea consumption in relation to cognitive decline have been divergent, likely due to confounds from dose-response effects. Therefore, this review article (meta-analysis) has been conducted.
Does alcohol, coffee or tea consumption reduce the risk of cognitive deficits (such as dementia or Alzheimer's disease)?
Study design:
This review article included 29 prospective cohort studies from America, Japan, China and some European countries (131,777 participants for alcohol, 333,843 participants for coffee and 20,411 participants for tea).
The NOS score was 8.
Results and conclusions:
The investigators found dose-response relationships showed that compared to non-drinkers, low consumption (11 g/day) of alcohol significantly reduced the risk of cognitive deficits or only dementias, but there was no significant effect of heavier drinking (>11 g/day).
The investigators found dose-response relationships showed that compared to non-drinkers, low consumption of coffee significantly reduced the risk of any cognitive deficit (2.8 cups/day) or dementia (2.3 cups/day).
However, coffee drinking was not a significant protective factor for cognitive deficits in groups of average age 60 years.
The investigators found dose-response relationships showed that compared to non-drinkers, every cup of green tea per day significantly reduced risk of cognitive deficits with 6% [relative risk = 0.94, 95% CI = 0.92 to 0.97].
The investigators concluded that light consumption of alcohol (11 g/day) and coffee (2.8 cups/day) reduces risk of cognitive deficits. Cognitive benefits of green tea consumption increases with the daily consumption.
Original title:
Alcohol, coffee and tea intake and the risk of cognitive deficits: a dose-response meta-analysis by Ran LS, Liu WH, […], Wang W.
Link:
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8061189/
Additional information of El Mondo:
Find more information/studies on alcohol, coffee and tea consumption and dementia right here.