Theaflavins (black tea extract)

Tier 2 — promising · Cardiovascular · Cholesterol · Antioxidant

The polyphenol fraction unique to black tea, formed when green tea leaves are oxidised during fermentation. Randomised trials at 375 mg/day of standardised black tea extract have shown LDL-C reductions of up to 11% and improvements in endothelial function and CRP. Capsule supplementation gives more consistent dosing than the 3–5 daily cups studied in the tea literature. Very safe, with no documented drug interactions at standard doses, though high-dose extracts should be taken with food to avoid mild nausea.

Dose: 200–700 mg/day theaflavins from black tea extract; equivalent to 3–5 cups of strong black tea