Re: A Question about Mulberry
Mulberry contains 1-deoxynojirimycin (DNJ), which blocks the enzyme, glycosidase, used to digest 2 unit sugars, such as sucrose (table sugar.) Folks in China have been taking Mulberry leaf tea for centuries, and the powdered leaf is actually very nutricious and high in protein.
I've tried it myself, and while I can't say it is delicious, its not horrible, either! Silkworms seem to like it.
I think it would be a good weight loss or anti-diabetic supplement in the future, but right now it is hard to find purified DNJ (currently, 2% extract is what's commonly available), so I think the amount you would need to use to be truly effective might be prohibitably expensive.
If you want to block sugar absorption, apparently Grean Coffee Bean extract (GCBE) will do the job (i.e. http://www.fbshealth.com/skinnylatte_research.php) and its safe and relatively cheap. Apparently, it works by blocking absorption in the intestines as well as release of sugar from the liver. I suppose that a product which combined DNJ and GCBE would be highly effective, but don't expect to see that until DNJ prices drop.
Also, I note that the evidence for Bitter Melon is especially strong, and its safe, readily available and inexpensive. Of all the herbal remedies for Diabetes, it is probably the best bet according to the currently available research.
Oh, and Cinnamon, but take care to use a water extract, as opposed to the powdered herb, as the essential oils might be toxic to the liver if taken in large quantities for an extended period of time!
Hope that helps!