Polyphenol EGCG in green tea (a powerful antioxident) is the main ingredient that caught my eye in "Kanger Pro-Lung". There are many scientific studies supporting the fact that green tea (polyphenol EGCG)does in fact aid in suppress cancerous cells. Here is a study in the Oxford Journal that shows EGCG positve role in fighting lung cancer cells. I am not a scientist so do not know how it was administered and whether you would recieve any anti oxidant/anti cancerous or healing efects from vaping "Kanger Pro-Lung" or green tea flavor extracts.
Green tea polyphenol EGCG suppresses lung cancer cell growth through upregulating miR-210 expression caused by stabilizing HIF-1
With that being said, Kanger is szkanger.com (without the dash) and I don't see where Kanger makes this liquid on the official website. And why would the dash website be out of stock on almost everything if it was the official Kanger site? Something is wrong with the tea in China, because this liquid is made by T-Hasegawa. Which name it does mention. Kanger at the top of the page, intentionaly throws you off. Notice how the bottle in the photo is not facing forward? That green ribbon wraps around straight across to the front of the bottle, where you will not find Kanger but T-Hasegawa instead. The flavor is "mint tea"
http://www.szkanger.com The real Kanger
If visiting a China website you really have to be careful and do your homework. There are many sites selling fakes/knock offs, and down right dangerous products.
I would be interested in making a DIY green tea extraction for health. Mmm maybe better to just drink it. lol