The Claim
Each additional cup of coffee consumed daily is associated with a statistically significant reduction in total brain volume by 1.42 mL, grey matter volume by 0.91 mL, white matter volume by 0.51 mL, and hippocampal volume by 0.01 mL, after adjusting for age, sex, and lifestyle factors.
What the research says
Supports is higher
Support is ahead, but a single strong opposing study can change this.
These are independent scores, not a percentage. Higher-grade studies count more, so a single strong opposing study can outweigh several weaker ones.
People who drink one more cup of coffee per day have slightly smaller total brain volume, grey matter, white matter, and hippocampal volume compared to those who drink less, after accounting for age, sex, and lifestyle differences.
See the scientific wording
Each additional cup of coffee consumed daily is associated with a statistically significant reduction in total brain volume by 1.42 mL, grey matter volume by 0.91 mL, white matter volume by 0.51 mL, and hippocampal volume by 0.01 mL, after adjusting for age, sex, and lifestyle factors, indicating a dose-dependent association between coffee intake and brain structure.
Caffeine blocks a natural brain chemical that helps regulate blood flow and cell growth. This causes less blood to reach brain tissue over time, and brain cells receive fewer signals to stay healthy and connected. As a result, brain tissue slowly shrinks in volume.
What the research says
1 studyStudy: High coffee consumption, brain volume and risk of dementia and stroke
This big study found that people who drink more coffee tend to have slightly smaller brains in certain areas, even after accounting for age and other habits—exactly what the claim says.
Score breakdown, mechanism chain, raw evidence, ideal studies needed & 1 supporting studies
Not medical advice. For informational purposes only. Always consult a qualified healthcare professional before making health decisions.