Having done extensive research on herbs for diabetes, I have come to the conclusion that there is no real scientific evidence of a natural CURE for diabetes.
However, there appears to be many herbs, foods or supplements that can help to keep your blood sugar levels in check.
1. Bitter Gourd
Each of these are presented as being a cure in varying quantities depending on where you look for your information.
I do know that my father managed to cope with type 2 diabetes by diet alone - he was about 65 when he developed it and followed a low carbohydrate eating regime - he had been taking metformin when first diagnosed, but after a few months of healthy eating was able to stop the drugs.
It's easier said than done to follow this sort of diet though - it takes discipline and time to plan, prepare and cook.
You might also find these pages interestingThe Herb Guide › Herbal Remedies › Herbs for Diabetes