24d • General discussion
New research on coffee, tea, and brain health
A large JAMA study followed 131,821 people for up to 43 years and found that higher intake of caffeinated coffee was associated with lower dementia risk and slightly better cognitive outcomes. Tea showed a similar pattern. Decaf did not show the same association.
The most pronounced association appeared at moderate intake: around 2–3 cups of caffeinated coffee or 1–2 cups of tea per day. This was linked to lower dementia risk and less subjective cognitive decline.
Important nuance: this is observational, so it does not prove that coffee or tea prevent dementia. But it does support the idea that moderate caffeinated coffee and tea may be part of a brain-healthy lifestyle. It’s not a magic bullet. Sleep, movement, metabolic health, and overall lifestyle still matter more than any single drink.
Question for the group:
Have you noticed that coffee or tea helps your focus and mental clarity — or does it just push your nervous system harder?
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New research on coffee, tea, and brain health
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