★☆☆☆☆
I drank it strong - steeped for 5 minutes, as suggested. And the redness/oiliness got progressively worse over several days. I think I had to stop on the 5th day because of the redness and greasiness of my facial skin.
I don't have this response to green tea, which I drink daily, and also take as a powder stirred into hot water. Both are Camellia sinensis. So it is clearly something unique about the double (or is it triple?) fermentation of Oolong.
Don't let it put you off trying it. It's a very healthful tea. I'm just sharing that it caused me problems with the skin on my face.