Is oolong a type of green tea?

In reality all teas are green tea, but some have been fermented and others have not. All tea (not herbal tea, which is not a tea) comes from the Cameillia sinensis plant which has two sub-varieties: sinensis and assamica.

White tea, green tea, gunpowder and oolong tea are all considered "green" tea, because of the amount of fermentation they've endured. White tea and green tea such as Sencha have almost no fermentation. Oolong has partial fermentation. However all of these teas have a special compound family known as catechins in them.

Catechins are what deliver most of the health benefit from green teas. The strongest of the six catechins is known as Epigallocatechin Gallate or EGCG. Generally speaking, the more fermentation a tea has gone through, there are fewer EGCG and other catechins in it. Black teas derives most of their health benefits from theaflavins, which green teas also possess.

Oolong tea has been credited with higher levels of fat burning - most famously from Oprah. However scientific tests of this have been inconclusive. All green teas burn fat by raising metabolism by at least 4 percent. However the claims of up to 17 percent metabolic rise with oolong teas has not been proven. There is some evidence, but more work has to be done.

Hope that helps. If you want to learn more about the absolutely amazing health properties of green tea, I strongly suggest you visit my website at https://green-tea-depot.com because we're about to include a blog that keeps everyone up to date on what's being learned. It seems every week that someone discovers another good reason to drink green tea for good health.