Caffeine blocks adenosine receptors in the brain and reduces amyloid plaque accumulation.
Strongly supported
Multiple high-quality studies back this claim.
Not medical advice. For informational purposes only. Always consult a healthcare professional.
Caffeine blocks adenosine receptors in the brain and reduces amyloid plaque accumulation.
When caffeine blocks adenosine receptors in the brain, it stops a chain reaction that normally increases harmful protein buildup and reduces blood flow. This allows blood vessels to open up, improves oxygen delivery to brain cells, and prevents the enzymes that create amyloid plaques and tangled tau proteins from becoming overactive.
What the research says
Supports
1 study
Study: Blockade of A2AR improved brain perfusion and cognitive function in a mouse model of Alzheimer’s disease
This study used a drug that blocks the same brain receptor as caffeine, and it found that blocking this receptor reduced plaque buildup linked to Alzheimer’s. So caffeine likely does the same thing.
Contradicts
1 study
Study: A1 Adenosine Receptors Accumulate in Neurodegenerative Structures in Alzheimer's Disease and Mediate Both Amyloid Precursor Protein Processing and Tau Phosphorylation and Translocation
This study didn't test caffeine at all — it found that when adenosine receptors in the brain are activated, they make Alzheimer's-related plaques worse. So, blocking them (like caffeine might do) could help, but we can't say for sure from this study alone.
Score breakdown, mechanism chain, raw evidence, ideal studies needed & 2 supporting studies