Diabetes is a chronic disease that affects millions of people worldwide. There are two main types of diabetes – type 1 and type 2. Type 2 diabetes accounts for about 90-95% of all diagnosed cases of diabetes and is typically associated with older age and obesity. The rates of type 2 diabetes are rising rapidly in adolescents and children, mainly due to an increase in childhood obesity.
Type 2 diabetes is a progressive disease that results from the body’s ineffective use of insulin. Insulin is a hormone produced by the pancreas that allows the body to use glucose from carbohydrates in food for energy or to store it for future use. In type 2 diabetes, the body loses its sensitivity to insulin over time and is not able to use it as well as it should. Initially, the pancreas tries to compensate by producing more insulin to overcome the reduced insulin sensitivity. But over many years, if not properly managed, the pancreas eventually becomes unable to keep up with the increased demand for insulin production.
Several factors contribute to the development of insulin resistance and type 2 diabetes. Genetics play a role, meaning diabetes is more common in people whose close family members also have diabetes. Age, excess weight, obesity, lack of physical activity, and poor diet all contribute to increasing insulin resistance and the risk of type 2 diabetes. Some studies suggest certain factors such as vitamin D deficiency, lack of sleep, depression, and high blood pressure could also increase type 2 diabetes risk. Pregnancy may also contribute to increased insulin resistance and diabetes risk in women.
While there is no cure for type 2 diabetes, it can be managed through lifestyle changes and medication if needed. Lifestyle modifications focus on weight loss, healthy eating, regular physical activity, stress management, and blood sugar monitoring. Weight loss is a particularly effective method for reducing insulin resistance and improving blood glucose levels in those with obesity or overweight. Losing just 5-7% of body weight through dietary changes and exercise can help control and sometimes reverse type 2 diabetes.
A heart-healthy diet low in refined and processed carbohydrates, sugar, and saturated fat is recommended. Slow-digesting complex carbs from whole grains, vegetables, fruits, beans, and legumes should make up the bulk of carbohydrate intake. Eating small frequent meals and snacks helps stabilize blood sugar levels throughout the day. Physical activity such as brisk walking, cycling, swimming or other aerobic exercise for at least 150 minutes per week can help cells become more responsive to insulin and improve blood sugar control.
If lifestyle modifications alone are not enough to control blood sugar levels, oral medications may be prescribed. Common medications used for type 2 diabetes include metformin, insulin sensitizers, insulin secretagogues, DPP-4 inhibitors, GLP-1 receptor agonists, SGLT2 inhibitors, and insulin itself. Each medication type works differently to lower blood glucose levels, but the goal is to help the body produce or use insulin more effectively without causing hypoglycemia. Combination medication therapy is often required as the disease progresses. Insulin injections may be necessary for some individuals to manage their blood sugar.
Even with treatment, long-term complications are still possible if blood glucose levels remain high over many years. Ongoing monitoring of A1c levels is important to gauge how well diabetes is controlled. Keeping blood sugar within target range can help prevent or delay complications such as eye disease, kidney disease, nerve damage, heart disease and stroke. It is also important for people with type 2 diabetes to work closely with their healthcare provider on an individualized treatment plan and to address risk factors like high blood pressure, high cholesterol and smoking that may worsen the disease.
Due to the increasing prevalence and associated health risks, type 2 diabetes poses a significant public health burden. It accounts for an estimated $237 billion annually in direct medical costs and lost productivity in the United States alone. With the alarming rise in childhood obesity and diabetes, future costs are projected to escalate even more dramatically. While there are no quick fixes, promoting healthy lifestyle behaviors and preventing or delaying diabetes through public health interventions may help curb this serious and costly epidemic. Targeted education on nutrition, physical activity, weight management and diabetes self-care should continue across communities. With a focus on prevention and empowering individuals to adopt lifestyle changes, the burden of type 2 diabetes could potentially decline in future generations.
Type 2 diabetes develops due to reduced insulin sensitivity that impairs glucose metabolism and utilization. Key contributing factors are obesity and lack of physical activity, but aging, genetics and other health conditions can also raise risk. While not curable, type 2 diabetes can be effectively managed through lifestyle modification, medications, self-monitoring and close medical supervision. Maintaining blood sugar control is crucial long-term to prevent serious health complications. Diabetes education and public policies aimed at health promotion, weight management and chronic disease prevention will continue to play an important role in curbing the impact of this global epidemic. With a concerted and ongoing community-wide effort, further progression of type 2 diabetes may potentially be slowed or even reversed over time.
Andrew Stroud