After doing much research there is a lot of evidence that drinking green tea lattes regularly, ideally 2 or more cups of tea daily, are less likely to develop Type 2 Diabetes. A research study published in American Journal of Clinical Nutrition in 2008 found after two studies were done, that regular consumption of green tea "can increase fat oxidation during moderate-intensity exercise and can improve insulin sensitivity and glucose tolerance".
According to a study in the Journal of Clinical Biochemistry and Nutrition, "A high frequency of green tea consumption is associated with lower levels of body mass index and serum LDL-cholesterol and triglycerides levels [2–4], and fasting glucose". They found in the study that the matcha caffeine and catechins in green tea have health benefits and that "the frequency of green tea consumption was inversely associated with the risk of type 2 diabetes".
Obesity and insulin resistance are both large contributors to type 2 diabetes…this is where Matcha green tea can play an important preventative role. The catechins in green tea have proven in many studies to "improve exercise performance, increase fat oxidation and prevent obesity". Matcha benefits the body's ability to aid in weight management and exercise, minimize fat storage, and improve insulin sensitivity making this superfood tea the perfect natural choice to help prevent diabetes.
Also remember that Matcha green tea is 10 times more potent compared to traditional green tea so Matcha will be that much more effective with helping to prevent and treat those with diabetes. Matcha is one of the highest "foods" in antioxidants which is a major reason why this amazing superfood is linked to treating Type 2 Diabetes. Also another reason to drink your matcha green tea latte daily!
References:
http://www.ajcn.org/content/87/3/778.full
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC2613497/