About Black Tea
Oxidized Camellia sinensis, rich in theaflavins and thearubigins rather than the catechins that dominate green tea. Observational data and some trials link black tea intake to modest LDL and blood-pressure effects, but controlled evidence for concentrated extracts is weaker than for green tea.
What Black Tea supports
- Theaflavin source with modest, mostly observational cardiovascular signals
How much Black Tea to take
The RDA prevents deficiency. The effective range is what clinical trials used to actually move the outcome.
Effective
200–1000
mg
No single therapeutic dose; nominal range for standardized black tea/theaflavin extracts. Cardiovascular studies often use several cups of tea rather than fixed extract amounts.
Clinical evidence
Limited clinical evidence. Mostly observational; concentrated-extract RCT evidence limited.