How Type 2 Diabetes Can Change Over Time

“Type 2 diabetes is considered progressive because the body’s ability to produce and use insulin changes over time,” says Barbara Eichorst, RD, CDCES, the vice president of healthcare programs at the American Diabetes Association. “Even with consistent self-care, the pancreas may gradually make less insulin, and the body may become more resistant to it.”

But you can make adjustments to your wellness approach to slow or stop disease progression as your T2D evolves.

• Insulin Resistance This condition happens when your body’s cells stop responding effectively to insulin, a hormone that regulates blood sugar levels. It’s influenced by both genetic and lifestyle factors, and over time, insulin resistance can lead to prediabetes or diabetes.

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• Prediabetes This condition is marked by blood sugar levels that are higher than normal, but not yet high enough for a diagnosis of type 2 diabetes.

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   It’s often reversible with weight loss, a healthier diet, and regular exercise.
• Beta-Cell Burnout Beta cells are specialized cells in the pancreas that produce, store, and release insulin. When they stop working properly, the pancreas can no longer keep up, and blood sugar continues to rise, potentially leading to a T2D diagnosis.

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   “The decline of beta cell function in T2D is greatly variable from patient to patient,” says Silvana Obici, MD, the chief of the division of endocrinology at Stony Brook University Renaissance School of Medicine and the medical director of the Stony Brook Medicine Diabetes Center in Lake Grove, New York.
• Long-Term Progression Over years or decades, insulin-producing cells continue to decline, and you may need treatment with insulin injections or other advanced therapies. Chronic hyperglycemia can also lead to a host of complications, such as heart disease, eye problems, nerve damage, and foot sores.

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Eichorst says progression is driven by a combination of factors, including a gradual decline in insulin-producing beta cell function, increased insulin resistance in the liver and muscles, hormonal changes that affect blood glucose regulation, and chronic inflammation.

“Together, these changes make it more difficult for the body to regulate blood glucose effectively over time,” she says.

Lifestyle choices, heredity, and demographics also factor into how quickly the disease can emerge and ramp up.

• Age The disease is more prevalent the older we get,

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   but “adults over 60 progress more slowly than middle-aged individuals,” says Dr. Obici.
• Ethnicity Communities of color are more likely to develop T2D and also more likely to suffer health complications from it, which researchers attribute largely to socioeconomic factors like disparities in income, housing, food environment, and healthcare access.

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• Body Weight Obesity is a leading contributor to the development and progression of type 2 diabetes.

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• Diet Both food insecurity and a poor-quality diet higher in refined grains, added sugar, sodium, and fat are associated with worse T2D control.

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• Lack of Exercise More time spent sitting has been linked to both an increased risk of type 2 diabetes and to cardiovascular complications if you already have diabetes.

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• Genetics Up to 70 percent of the risk for T2D can be attributed to genetic factors. Your diabetes may progress more quickly or slowly depending on your family history of the condition.

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“Lifestyle interventions aimed at sustained weight loss of at least 7 percent of body weight and at least 150 minutes of moderate-intensity exercise weekly can delay or prevent progression of type 2 diabetes, as demonstrated by the National Diabetes Prevention Program,” says Obici.

As is the case with all types of disease management, good communication is an important component of good health outcomes.

“It is important to stay connected with your healthcare team,” says Eichorst. “Ongoing, proactive conversations are key to staying ahead of changes.”

Eichorst says to consult your healthcare provider if your symptoms are changing in any of the following ways:

• Your blood glucose levels are trending higher or becoming harder to manage.
• You notice new symptoms like increased thirst, fatigue, or frequent urination.
• You’re experiencing changes in weight, effects from the medications you take, or in your overall health.
• You’re experiencing life transitions, such as job changes, relocation, or sleeping problems that may affect your routine.

• Type 2 diabetes (T2D) is a progressive condition. Over time, your body becomes more resistant to insulin and produces less of it, making blood sugar harder to control even with consistent self-care.
• The disease typically advances in stages and is influenced by factors like genetics, weight, age, lifestyle, and other health conditions.
• T2D management often needs to evolve over time, including possible medication changes, but healthy habits — especially diet, exercise, and weight management — remain key to slowing progression and reducing complications.