This wu yi tea is no different than wu long tea which is basically the same as oolong tea.
Wu Yi simply stands for the mountainous region in China where this characteristically dark rich tea is grown. Wu yi teas tend to be fully browned and very robust – almost coffee like when described by serious tea drinkers.
The health benefits and calorie burning properties of wu yi teas are the same as wu long and oolong teas.
A substance called "Polyphenol" in wu yi tea is known to effectively control obesity. Specifically speaking, it activates the enzyme that is responsible for dissolving triglyceride. It basically speeds the metabolism – the result – you burn more calories.
So as a weight loss aid, wu yi tea has been researched and the findings have been documented. Please note, many studies on wu long tea have been conducted so the findings apply to wu yi as well.
It’s just marketing and repackaging a popular tea under a different name. The reputable online tea outlets have been selling tea from the Wu Yi region for years - it's nothing new.
The beauty of wu yi / wu long / oolong tea is that the unique fermenting process creates a delightful variety of tastes and aromas that don’t fall into one distinct category.
Specific types of wu yi tea can vary considerably in price. There are many! The chemical make up is basically the same but the complexity of taste will be different. The aroma, astringency, body, toastiness, and fullness, to name a few all vary significantly between types of wu yi teas. Like wines, the more complex the taste the higher the price (usually per oz in loose leaf tea).
Also a word about ingredients in tea…Reputable loose-leaf tea distributors that sell wu yi / wu long / oolong add nothing to the tea. It is a purely natural substance with nothing man made or added.