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Posted date:
12th Jun '16

Dr Carrie Ruxton says:

"Diabetes is one of the fastest growing health threats of our time and a major public health issue1. In fact, 1 in 16 people in the UK currently live with diabetes (diagnosed or undiagnosed)2 and this figure is set to rise further.

"Ultimately, diabetes is a condition of disordered glucose metabolism linked with obesity. The main source of glucose in the body comes from the digestion and hydrolysis of dietary carbohydrates, i.e. starches and sugars. The digestive enzymes pancreatic alpha-amylase and the intestinal alpha glucosidases are responsible for breaking down carbohydrates into glucose. Given this, I read with interest findings from two studies demonstrating that extracts from black tea leaves can help to modulate levels of the these enzymes, reducing the formation of glucose3,4.

"Whilst on-going research is needed in this area, the research provides encouragement to Britain’s black tea drinkers suggesting that black tea is a healthy, hydrating beverage that could help to control the digestion of carbohydrates and hence have a role in helping to manage or prevent type 2 diabetes."


1 https://www.diabetes.org.uk/Documents/Position statements/Diabetes UK Facts and Stats_Dec 2015.pdf
2 Wang L et al. (2014) Tea consumption and lung cancer risk: a meta-analysis of case-control and cohort studies Nutrition 30(10):1122-7.
3 Striegel, L et al. (2015) Effect of black tea and black tea pomace polyphenols on ?-glucosidase and ?-amylase inhibition, relevant to type 2 diabetes prevention. Frontiers in Nutrition doi: 10.3389/fnut.2015.00003
4 Satoh T et al. (2015) Inhibitory effect of black tea and its combination with acarbose on small intestinal ?-glucosidase activity. J Ethnopharmacol 161:147-55

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