A Chinese herbal formula known as wu ling san was shown to not only reduce blood sugar levels, but to reverse the resulting kidney damage in mice. This is incredibly important if you are diabetic because the kidneys are one of the areas that can lead to serious diabetic complications such as dialysis. The fact that you may be able to not just prevent kidney damage, but reverse it is highly significant. If you or anyone in your family is diabetic, you should consider consulting with a professional. We don’t recommend self-prescribing. Herbs are just like pharmaceuticals (in fact many pharmaceuticals actually come form herbs) and you need to know when something is appropriate and, just as important, at what dose. You also need to know how to balance some of the herbs. In this case, the formula can cause a number of side effects if it is not appropriate for your particular constitution. A competent herbalist will know how to monitor you on the formula and how to identify and counteract side effects before they become problematic.
 
J Ethnopharmacol. 2009 Jul 15;124(2):211-8. Epub 2009 May 3