Several types of plants are referred to as ginseng, but most studies have used American ginseng. They've shown some sugar-lowering effects in fasting and after-meal blood sugar levels, as well as in A1c results (average blood sugar levels over a 3-month period). But we need larger and more long-term studies. Researchers also found that the amount of sugar-lowering compound in ginseng plants varies widely.
Stem cell research has also been suggested as a potential avenue for a cure since it may permit regrowth of Islet cells which are genetically part of the treated individual, thus perhaps eliminating the need for immuno-suppressants.[48] This new method autologous nonmyeloablative hematopoietic stem cell transplantation was developed by a research team composed by Brazilian and American scientists (Dr. Julio Voltarelli, Dr. Carlos Eduardo Couri, Dr Richard Burt, and colleagues) and it was the first study to use stem cell therapy in human diabetes mellitus This was initially tested in mice and in 2007 there was the first publication of stem cell therapy to treat this form of diabetes.[73] Until 2009, there was 23 patients included and followed for a mean period of 29.8 months (ranging from 7 to 58 months). In the trial, severe immunosuppression with high doses of cyclophosphamide and anti-thymocyte globulin is used with the aim of "turning off" the immunologic system", and then autologous hematopoietic stem cells are reinfused to regenerate a new one. In summary it is a kind of "immunologic reset" that blocks the autoimmune attack against residual pancreatic insulin-producing cells. Until December 2009, 12 patients remained continuously insulin-free for periods ranging from 14 to 52 months and 8 patients became transiently insulin-free for periods ranging from 6 to 47 months. Of these last 8 patients, 2 became insulin-free again after the use of sitagliptin, a DPP-4 inhibitor approved only to treat type 2 diabetic patients and this is also the first study to document the use and complete insulin-independendce in humans with type 1 diabetes with this medication. In parallel with insulin suspension, indirect measures of endogenous insulin secretion revealed that it significantly increased in the whole group of patients, regardless the need of daily exogenous insulin use.[74]
Evidence linking hepatic insulin sensitivity to intraorgan triglyceride content has been steadily accumulating. In insulin-treated type 2 diabetes, insulin dose correlates with the extent of fatty liver (35), and in turn, this is associated with insulin sensitivity to suppression of hepatic glucose production (36). Decreasing the fat content of liver is associated with improvement in insulin suppression of glucose production and, thereby, with improvement in fasting plasma glucose (20,23).

Although chromium does have an effect on insulin and on glucose metabolism, there is no evidence that taking chromium supplements can help in the treatment of diabetes. But chromium is found in many healthy foods, such as green vegetables, nuts, and grains. Studies have suggested that biotin, also called vitamin H, when used with chromium, may improve glucose metabolism in people with diabetes. But no studies have shown that biotin by itself is helpful.
Given the prevalence of diabetes and the chronic nature of the disease, it’s no surprise that CAM is a popular treatment option. I don’t see a lot of CAM use in Type 1 diabetics. Insulin is the primary treatment, it works well, and patients can objectively measure their own blood sugar. Type 1 diabetics don’t seem to experiment with supplements that might alter their blood sugars. Those patients end up hospitalized or dead.
One such study, published in July 2018 in the Journal of the American Medical Association, found that intermittent fasting was no better at improving type 2 diabetes participants’ blood sugar levels than regular caloric restriction after one year. Previous studies on mice suggest intermittent fasting may improve memory, reduce disease risk, and aid with weight loss, according to an article published in June 2013 in the journal CMAJ, but, as Dr. Gabbay points out, “That doesn’t always translate to people.”
There is no prescribed diet plan for diabetes and no single “diabetes diet”. Eating plans are tailored to fit each individual's needs, schedules, and eating habits. Each diabetes diet plan must be balanced with the intake of insulin and other diabetes medications. In general, the principles of a healthy diabetes diet are the same for everyone. Consumption of various foods in a healthy diet includes whole grains, fruits, non-fat dairy products, beans, lean meats, vegetarian substitutes, poultry, or fish.