Compound Monograph
Theaflavin (TF)
Theaflavin is a reddish polyphenol pigment formed when tea catechins are oxidised during black-tea processing.
Where Does It Come From? (1)
Theaflavin (TF) is a naturally occurring theaflavin (benzotropolone polyphenol), found in Tea. It is well tolerated orally (low toxicity).
Research & Evidence
Theaflavin is the parent compound of the theaflavins, a group of reddish-orange pigments that form when the catechins of green tea are enzymatically oxidised during black-tea manufacture. They contribute to the colour and briskness of black tea. Theaflavin has been studied in the laboratory for antioxidant and other activities, and is sometimes grouped loosely with tea flavonoids, although structurally it is a benzotropolone-based polyphenol distinct from the simple flavonoids.
Toxicity & Safety
As a constituent of ordinary black tea, theaflavin is consumed routinely and is regarded as low in toxicity at dietary levels. Concentrated extracts have not been as fully characterised.