Maybe the most popular of teas and for a good reason. Long used in traditional Chinese medicine and not only, and let's face it, if it is still used there must be a reason for it, right?
Similar to black and green teas, oolong tea contains several vitamins, minerals, and helpful antioxidants.
A cup of brewed oolong tea contains small amounts of calcium, magnesium, and potassium. It also contains about 38 mg of caffeine. In comparison, a cup of green tea contains about 29mg of caffeine
In general, tea has been shown to help protect against diabetes and complications from diabetes, possibly by easing insulin resistance and decreasing inflammation, among other mechanisms
Accordingly, a study from 2021 and a review from 2019 both report links between regular tea consumption, improved blood sugar management, and a lower risk of developing type 2 diabetes