Bahorun T, Luximon-Ramma A, Neergheen-Bhujun VS, Gunness TK, Googoolye K, Auger C, Crozier A, Aruoma OI.
ANDI Centre of Excellence for Biomedical and Biomaterials Research, CBBR Building, MSIRI, University of Mauritius, Réduit, Republic of Mauritius.
A prospective randomized controlled clinical trial determined the effect of Mauritian black tea consumption on fasting blood plasma levels of glucose, lipid profiles and antioxidant status in a normal population.
The study group (71%) consumed 3 x 200ml of black tea infusate/day for 12weeks without additives followed by a 3week wash-out. The control group (29%) consumed equivalent volume of hot water for same intervention period.
The tea used had high levels of gallic acid derivatives (50±0.4mg/L), flavan-3-ols (42±2mg/L), flavonols (32±1mg/L) and theaflavins (90±1mg/L). Daily 9g supplementation of black tea infusate induced, in a normal population, a highly significant decrease of fasting serum glucose (18.4%; p<0.001) and triglyceride levels (35.8%; p<0.01), a significant decrease in LDL/HDL plasma cholesterol ratio (16.6%; p<0.05) and a non significant increase in HDL plasma cholesterol levels (20.3%), while a highly significant rise in plasma antioxidant propensity (FRAP: 418%; p<0.001) was noted .
Black tea consumed within a normal diet contributes to a decrease of independent cardiovascular risk factors and improves the overall antioxidant status in humans.
On a side note, that’s the first time I’ve seen any research coming out of Mauritius.