Here is a good website that summarizes the benefits and ongoing research. My Dad has cancer and we have been making Bitter juice for him all summer. He loves it and thinks it is helping him immensely. The juice by itself is hard to drink, but add a couple of ounces to other fruit juice and it is pretty good. There are varieties from different parts of Asia. The ones I grow came from Baker Creek Heirloom Seeds. They refer to it as Delica Thorn Bitter Melon. Whether you want it for Cancer, Diabetes or other health benefits, it is a beautiful plant to grow.
Beautiful flowers are a bonus.