Green tea extract may lower blood sugar and improve gut health

In a robust clinical trial (i.e., randomized, double-blind, placebo-controlled, crossover study), a Penn State-Ohio State research collaboration led by Professor and a researcher Richard Bruno, Ph.D.DR, participants followed a diet low in polyphenols while consuming 1 gram of green tea extract in supplement form each day for 28 days. This particular green tea extract contained 890 milligrams of catechins, the famous polyphenol phytonutrients in green tea leaves (EGCG being probably the best known).

By reducing the intake of polyphenols (i.e. phytochemicals found in fruits, vegetables and many other plants) in their staple diet, the researchers were able to reduce some of the surrounding nutritional “noise” to focus on the gut-liver axis. the impact of these fascinating green tea catechins.

By the end of the month, the study authors observed that participants’ blood sugar levels were falling, while key markers of inflammatory status in the gut were improving. This means that in participants who took 1 gram of green tea extract each day, there were significant and simultaneous improvements in gut barrier function as well as cardiometabolic health (i.e. the glycemic control as evidenced by the drop in blood sugar).

Rachel J. Bradford