I am not familiar with that plant, so can't comment directly to the thread topic.
However, if you are interested in plants that combat diabetes, there are many to choose from, that are cheap, and easy to grow and propagate. For instance, both Gynura Procumbens and bitter melon are known to combat diabetes, and both should be easy for you to get in Hawaii. Hibiscus is another plant that works against diabetes - of which you have many in HI, of course. There are certainly many fruits that are helpful with this, but there are even more tropical vegetables that are helpful, and are easier to grow in large quantities quickly and cheaply without taking as much space as fruit trees. Just thought I would add this in case you, or someone else reading, was unaware and could benefit from this information.