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Caffeine and Cardiometabolic Health: A New AHA Scientific Statement
By the GlycemicWise Data Editorial Team · Published 2026-08-08 · Last reviewed 2026-08-08 · Beverages · 6-8 min read · Dietary reference only
An American Heart Association statement found safe levels of caffeine appear neutral or beneficial for cardiometabolic health — and may help prevent type 2 diabetes.
What the AHA Said
A new American Heart Association scientific statement (announced early August 2026) reviewed the evidence on caffeine — the world's most consumed psychoactive substance — and cardiometabolic health. The headline: caffeine consumed below safe thresholds appears not to harm heart health, and regular coffee and tea intake has been associated with a lower risk of type 2 diabetes in large observational datasets.
This is consistent with the long line of cohort studies linking moderate coffee consumption with lower diabetes incidence — associations that hold even after adjusting for lifestyle factors.
The Fine Print
'Safe levels' is the operative phrase. The statement is about moderate, habitual intake — roughly the equivalent of a few cups of coffee daily — not energy drinks, not caffeine added to everything, and not consumption that disrupts sleep. The diabetes signal is strongest for unsweetened coffee and tea; adding sugar or syrup moves the drink from the protective column to the glucose column.
On the food pages the framing is clean: black coffee is GL 0, unsweetened black tea is GL 0, and sweetened versions climb with every added spoonful.
GlycemicWise data perspective
A quick check of our database: coffee brewed breakfast blend comes in at GL 0 per 100g (Low GL). Across the 367 Beverages foods GlycemicWise covers, 74% fall in the low-GL range.
What This Means for Your Cup
If you already drink coffee or tea, the AHA statement is reassurance rather than a prescription to start. If you drink it, keep it unsweetened (or minimally sweetened), keep total caffeine within a moderate range, and do not use it to mask sleep debt — poor sleep is a real glucose factor on its own. The GL 0 status of plain coffee and tea makes them among the safest habitual drinks on the entire site.
Dietary reference — not medical advice. Information provided for educational purposes.