Research on the relationship between coffee consumption and brain function presents a nuanced picture, with various studies suggesting different optimal levels of consumption:
Three to Four Cups for Enhanced Brain Structure: A study highlighted by MindBodyGreen reported that individuals who regularly drank three to four cups of coffee per day had the strongest brain structure. This was measured in terms of preserved cortical thickness, which is generally associated with higher intelligence.
One to Two Cups for Lower Incidence of Cognitive Disorders: A meta-analysis conducted in 2016, which included nine prospective cohort studies, found that drinking one to two cups of coffee daily was associated with a lower incidence of cognitive disorders such as cognitive decline, cognitive impairment, Alzheimer's Disease (AD), and all-cause dementia, compared to consuming less than one cup.
High Consumption and Brain Volume: On the other hand, a Mendelian randomization analysis indicated that higher coffee consumption was inversely associated with gray matter volume. This suggests that while moderate consumption might be beneficial, excessive consumption could have adverse effects on brain structure.
Risks of Excessive Coffee Consumption: A study involving 398,646 participants from the UK Biobank found that high coffee consumption, defined as more than six cups a day, was linked to smaller total brain volumes and a 53% higher odds of dementia, as well as an increased risk of stroke.
These findings suggest that while moderate coffee consumption (around one to four cups per day) may have beneficial effects on brain function and structure, excessive consumption (more than six cups per day) may pose risks to brain health. It's important for individuals to consider their own health conditions and consult with healthcare professionals when determining the right balance for their coffee intake.
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