Anti-diabetic effect of a leaf extract from Gymnema sylvestre in non-insulin-dependent diabetes mellitus patients - Possible regeneration of the islets of langerhans in streptozotocin-diabetic rats given gymnema sylvestre leaf extracts - Effects of a cinnamon extract on plasma glucose, HbA1c, and serum lipids in diabetes mellitus type 2 - Effectiveness of Cinnamon for Lowering Hemoglobin A1C in Patients with Type 2 Diabetes: A Randomized, Controlled Trial - Cloves protect the heart, liver and lens of diabetic rats - Cloves improve glucose, cholesterol and triglycerides of people with type 2 diabetes mellitus - Effects of rosemary on lipid profile in diabetic rats - Inhibition of Advanced Glycation End-Product Formation by Origanum majorana L. In Vitro and in Streptozotocin-Induced Diabetic Rats - Evaluation of clonal herbs of Lamiaceae species for management of diabetes and hypertension - Metformin-like effect of Salvia officinalis (common sage): is it useful in diabetes prevention? - Antidiabetic effect of garlic (Allium sativum L.) in normal and streptozotocin-induced diabetic rats - Antiglycation Properties of Aged Garlic Extract: Possible Role in Prevention of Diabetic Complications - Effect of ethanolic extract of Zingiber officinale on dyslipidaemia in diabetic rats - Effect of Ginger Extract Consumption on levels of blood Glucose, Lipid Profile and Kidney Functions in Alloxan Induced-Diabetic Rats - Efficacy of turmeric on blood sugar and polyol pathway in diabetic albino rats - Hypolipidemic action of curcumin, the active principle of turmeric (Curcuma longa) in streptozotocin induced diabetic rats - A REVIEW ON ROLE OF MURRAYA KOENIGII (CURRY LEAF) IN (DIABETES MELLITUS – TYPE II) PRAMEHA - Capsaicin and glucose absorption and utilization in healthy human subjects - Inhibition of Advanced Glycation End-Product Formation by Origanum majorana L. In Vitro and in Streptozotocin-Induced Diabetic Rats - Use of Fenuqreek seed powder in the management of non-insulin dependent diabetes mellitus - Ginseng and Diabetes: The Evidences from In Vitro, Animal and Human Studies -  
Diabetes has grown to “epidemic” proportions, and the latest statistics revealed by the U.S. Centers for Disease Control and Prevention state that 30.3 million Americans have diabetes, including the 7.2 million people who weren’t even aware of it. Diabetes is affecting people of all ages, including 132,000 children and adolescents younger than 18 years old. (2)

A useful test that has usually been done in a laboratory is the measurement of blood HbA1c levels. This is the ratio of glycated hemoglobin in relation to the total hemoglobin. Persistent raised plasma glucose levels cause the proportion of these molecules to go up. This is a test that measures the average amount of diabetic control over a period originally thought to be about 3 months (the average red blood cell lifetime), but more recently[when?] thought to be more strongly weighted to the most recent 2 to 4 weeks. In the non-diabetic, the HbA1c level ranges from 4.0–6.0%; patients with diabetes mellitus who manage to keep their HbA1c level below 6.5% are considered to have good glycemic control. The HbA1c test is not appropriate if there has been changes to diet or treatment within shorter time periods than 6 weeks or there is disturbance of red cell aging (e.g. recent bleeding or hemolytic anemia) or a hemoglobinopathy (e.g. sickle cell disease). In such cases the alternative Fructosamine test is used to indicate average control in the preceding 2 to 3 weeks.
Insulin is a hormone that helps glucose get where it needs to go. When your body senses that you’ve eaten something, your pancreas produces insulin to help your cells absorb sugar. If you didn’t have insulin, your cells wouldn’t receive their glucose fuel, and your body would sense sugar in your bloodstream and eventually store it as fat because your cells didn’t use it.
Although a defect in mitochondrial function is associated with extremes of insulin resistance in skeletal muscle (30), this does not appear to be relevant to the etiology of type 2 diabetes. No defect is present in early type 2 diabetes but rather is directly related to ambient plasma glucose concentration (31). Observed rates of mitochondrial ATP production can be modified by increasing or decreasing plasma fatty acid concentration (32,33). Additionally, the onset of insulin stimulation of mitochondrial ATP synthesis is slow, gradually increasing over 2 h, and quite distinct from the acute onset of insulin’s metabolic effects (34). Although it remains possible that secondary mitochondrial effects of hyperglycemia and excess fatty acids exist, there is no evidence for a primary mitochondrial defect underlying type 2 diabetes.

Sugars raise insulin levels, and over extended periods of time, damage the pancreas and cause insulin resistance, a precursor for diabetes. Fructose is the top offender in the sugar world, as it is recognized as a toxin the body and has no proven benefit to the body. Fructose is immediately taken to the liver, where it must be processed, and some doctors now suggest that this may be a large factor in development of fatty liver disease. Excess sugar in the bloodstream also increases the release of cortisol and adrenaline (more on those in a minute), slows the immune response, decreases necessary Leptin levels and promotes fat storage. There are various types of sugar and sweeteners, and while all should be limited, some are worse than others:
Bitter in taste, neem is beneficial in treating diabetes. Studies have proved that incorporating Indian lilac can maintain blood sugar levels stimulating insulin activity without hindrance. Although natural sources do not contain adverse effects, it is still suggested to consult with your endocrinologist in case constant high glucose content in the bloodstream.
Get Your Fats in Good Balance– Overabundance of Omega-6 fats in the diet is a contributing factor in diabetes. Pay attention to your intake of  Omega-3 and Omega-6 fats and try to get them closer to a 1:1 ratio. For many people, supplementing with a good quality Omega-3 oil can help while dietary adjustments are being made. Avoid Omega-6 seed oils and their sources (these are used at almost every restaurant). Eat fatty fish like salmon and sardines for the Omega-3s.
In that analysis, the Khan study looks like an outlier. More studies have emerged since then: Crawford in 2009 found 1g of cinnamon per day reduced A1C levels compared to placebo. Suppapitiporn found no effect on any measure with 1.5g per day. Akilen, in 2010, found an effect with 2g per day. Another meta-analysis, published in 2012 and included 6 studies, concluded the opposite of Baker, and made positive conclusions:
In addition to walking and stretching exercises, try interval training cardio, like burst training, or weight training three to five days a week for 20–40 minutes. Burst training can help you burn up to three times more body fat than traditional cardio and can naturally increase insulin sensitivity. You can do this on a spin bike with intervals, or you can try burst training at home.
Like the sulfonylureas, meglitinides is a class of drugs that work by promoting insulin secretion from the pancreas. Unlike the sulfonylureas, which last longer in the body, repaglinide (Prandin) and nateglinide (Starlix) are very short acting, with peak effects within one hour. For this reason, they are given up to three times a day just before meals.