The Claim
Daily consumption of 8 or more cups of boiled coffee is associated with an 83% higher risk of dementia in women, and daily consumption of 4 to 5 cups of filtered coffee is associated with a 52% lower risk of dementia in men, based on a 22-year follow-up of 7,381 middle-aged Norwegians.
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.
Women who drink eight or more cups of boiled coffee daily have an 83% higher rate of dementia compared to those who drink less, while men who drink four to five cups of filtered coffee daily have a 52% lower rate of dementia.
See the scientific wording
Daily consumption of 8 or more cups of boiled coffee is associated with an 83% higher risk of dementia in women, while daily consumption of 4 to 5 cups of filtered coffee is associated with a 52% lower risk of dementia in men, based on a 22-year follow-up of 7,381 middle-aged Norwegians, suggesting that coffee preparation method and sex may influence long-term cognitive outcomes.
Drinking large amounts of boiled coffee raises bad cholesterol in the blood, which clogs blood vessels in the brain, leading to damage that causes dementia. This effect is stronger in women. Men who drink filtered coffee do not get this cholesterol spike, and their brains may be protected by caffeine and antioxidants.
What the research says
1 studyThis study found that women who drank a lot of boiled coffee were more likely to get dementia later, while men who drank a moderate amount of filtered coffee were less likely to get dementia — just like 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.