Yes and no. If you learn to live a healthier lifestyle and stay with it for your remaining years, then yes it can be reversed. This assumes you realized your diagnosis early and you are able to get your A1c below 6%. If you realized your diabetes too late or your A1c is not coming down without insulin then probably not. This is easier to reverse when you are overweight or obese but not so if your BMI is below 25.
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.
Imagine that you hide your kitchen garbage under the rug instead throwing it outside in the trash. You can’t see it, so you can pretend your house is clean. When there’s no more room underneath the rug, you throw the garbage into your bedroom, and bathroom, too. Anywhere where you don’t have to see it. Eventually, it begins to smell. Really, really bad.
The diabetes market is expected to reach a massively big €86Bn by 2025 combining both type 1 (€32Bn) and type 2 (€54Bn) treatments, and we can expect all sort of revolutionary technologies to come forward and claim their market share. Researchers are already speculating about microchips that can diagnose diabetes type 1 before the symptoms appear or nanorobots traveling in the bloodstream while they measure glucose and deliver insulin.
Genetic factors do play a role in any disease, but I put this factor last for a reason. Genetic predisposition to a given disease will increase the chances of getting the disease, but not in a vacuum. People with a strong predisposition to liver disease manage to avoid it, and some with a family history of heart disease remain heart-attack free. Even studies among identical twins show that in most cases, twins will get the same diseases, even in different environments, but sometimes they don’t. This means there are other factors involved (see above).

Recently[when?] it has been suggested that a type of gastric bypass surgery may normalize blood glucose levels in 80–100% of severely obese patients with diabetes. The precise causal mechanisms are being intensively researched; its results may not simply be attributable to weight loss, as the improvement in blood sugars seems to precede any change in body mass. This approach may become a treatment for some people with type 2 diabetes, but has not yet been studied in prospective clinical trials.[83] This surgery may have the additional benefit of reducing the death rate from all causes by up to 40% in severely obese people.[84] A small number of normal to moderately obese patients with type 2 diabetes have successfully undergone similar operations.[85][86]

Diabetes is a well-established problem and a multi-billion dollar industry. It is medically characterized by Fasting Blood Glucose higher than 126 mg/dL , which ranges between 100-125 mg/dL are considered pre-diabetic and ranges below 99 mg/dL are considered normal. Studies are finding that a fasting blood glucose below 83 mg/dL is actually a better benchmark, as risk of heart disease begins to increase at anything above that.
One of the lesser known herbs that lower blood sugar, Marjoram, is high in polyphenols, which aids in stabilizing blood glucose levels. A 2012 study in the Journal of Evidence Based Alternative and Complementary Medicine found that Marjoram reduced formation of Advanced Glycation End (AGE) products. AGE is the smoking gun that researchers today say is responsible for a lot of the complications that diabetics face, like damage to arteries and eyes. Try sprinkling marjoram on your dinner every night to help add variety in flavor. It can often be used as a substitute for oregano in cooking and brings in a distinct flavor to dishes.

Many manufacturers offer pen delivery systems. Such systems resemble the ink cartridge in a fountain pen. A small, pen-sized device holds an insulin cartridge (usually containing 300 units). Cartridges are available for the most widely used insulin formulations. The amount of insulin to be injected is dialed in, by turning the bottom of the pen until the required number of units is seen in the dose-viewing window. The tip of the pen consists of a needle that is replaced with each injection. A release mechanism allows the needle to penetrate just under the skin and deliver the required amount of insulin.

Drugs of this class decrease the absorption of carbohydrates from the intestine. Before being absorbed into the bloodstream, enzymes in the small intestine must break down carbohydrates into smaller sugar particles, such as glucose. One of the enzymes involved in breaking down carbohydrates is called alpha-glucosidase. By inhibiting this enzyme, carbohydrates are not broken down as efficiently, and glucose absorption is delayed.