Energy balance
Black tea theaflavins (TF-1, TF-2, TF-3) reduce hepatic lipid accumulation and fatty acid synthesis while stimulating fatty acid oxidation in human hepatocytes (HepG2) and high-fat diet-fed rats by activating AMPK via the LKB1 and ROS pathways.
Black tea contains theaflavins, which appear to help reduce liver fat and improve lipid metabolism by activating AMPK, a key energy sensor. While this study used high concentrations in cells and rats, drinking black tea as part of a healthy diet may offer metabolic benefits, particularly for those with fatty liver or obesity risk, though it is not a substitute for medical treatment.
We found that theaflavins significantly reduced lipid accumulation, suppressed fatty acid synthesis, and stimulated fatty acid oxidation. Furthermore, theaflavins also inhibited acetyl-coenzyme A carboxylase activities by stimulating AMP-activated protein kinase (AMPK) through the LKB1 and reactive oxygen species pathways.
Why this rating
Strong mechanistic evidence in vitro and in vivo, but lacks human clinical trial data for efficacy.
Source
Theaflavins attenuate hepatic lipid accumulation through activating AMPK in human HepG2 cells
Chih‐Li Lin et al. · Journal of Lipid Research · 2007
DOI 10.1194/jlr.m700128-jlr200
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