Overview
- The study, published Wednesday, followed 485,934 Chinese adults for a median of 9.05 years and found habitual tea drinkers had about an 11% lower risk of vascular disease compared with non‑drinkers.
- Associations varied by tea characteristics: black tea and moderate-strength brews showed the most consistent lower-risk signals while people who reported drinking tea at a "burning hot" temperature had higher vascular risk.
- Researchers saw a U-shaped pattern for amount, with the lowest estimated risk near six to eight cups per day among weekly drinkers and rising risk again at very high intake levels that the authors partly attributed to excess caffeine.
- Key limitations weaken causal claims because tea habits were self-reported once, cup size and exact temperatures were not standardised, and residual differences in diet, income and lifestyle could explain some of the link.
- Tea contains polyphenols and flavonoids with plausible blood-vessel benefits, prior observational reviews show similar modest associations, and experts say the next steps are replication, mechanistic studies and cautious public guidance such as avoiding scalding drinks and limiting added sugar and excess caffeine.