Check out this article in Medical News Today: https://www.medicalnewstoday.com/articles/could-drinking-tea-every-day-reduce-type-2-diabetes-risk
This is a summary of the finding: Now, an observational study from China suggests that people who drink tea regularly, particularly dark tea, may improve their blood glucose levels and decrease insulin resistanceTrusted Source, reducing the risk of type 2 diabetes.
I am someone who drinks tea almost daily and who prefers black tea and puerh tea in particular. Green tea often gets all the good publicity so this is welcome. Also, as I have talked about in other posts, most if not all recent coffee studies have shown its benefits. Another tea with substantial benefits that is good for drinking late in the day (because it has no caffeine) is rooibos tea which is from a different plant found in Africa. Some of the benefits associated with rooibos tea are: improves heart health, weight loss, blood pressure regulation, anti-inflammatory, bone health, anti-oxidant .
Monte Jackson, owner Acupuncture Center of Richmond