What is type 2 diabetes?
Type 2 diabetes is a chronic metabolic condition in which the body either does not produce enough insulin or does not use it effectively, causing blood glucose to rise above healthy levels. Unlike type 1 diabetes, which is an autoimmune condition, type 2 diabetes develops over time and is strongly influenced by lifestyle, weight, and genetics.
In the United States, approximately 37 million people have diabetes and another 96 million have prediabetes — elevated blood sugar that has not yet reached the diagnostic threshold for diabetes. Most people with prediabetes are unaware of it.
Type 2 diabetes is a leading risk factor for cardiovascular disease, kidney disease, neuropathy, vision loss, and other serious complications. Early diagnosis and management meaningfully reduce these risks.
Signs and symptoms
Type 2 diabetes often develops gradually and may be asymptomatic for years. When symptoms do occur:
Causes and risk factors
Type 2 diabetes results from a combination of insulin resistance (cells do not respond normally to insulin) and progressive decline in insulin secretion by the pancreatic beta cells. Key risk factors include:
- Excess body weight — particularly visceral (abdominal) fat, which drives insulin resistance
- Physical inactivity — regular exercise improves insulin sensitivity significantly
- Family history — having a first-degree relative with type 2 diabetes roughly doubles risk
- Age over 45 — risk increases with age, though rates in younger adults are rising
- History of gestational diabetes or PCOS
- Prediabetes — without lifestyle intervention, many progress to type 2 within 5 years
- Certain ethnic backgrounds — South Asian, Black, Hispanic, and Native American populations have higher risk
A 5–10% reduction in body weight in people with prediabetes reduces the risk of progression to type 2 diabetes by 58% — more than any single medication.
Can type 2 diabetes be managed online?
Telehealth is appropriate for ongoing management of stable type 2 diabetes in patients who already have a diagnosis and regular primary care, as well as for initial evaluation of people with risk factors or symptoms. However, diagnosis requires laboratory testing — a clinician cannot diagnose diabetes without an HbA1c or fasting glucose result. Lab work will be ordered as part of the evaluation.
Telehealth is NOT appropriate for diabetic emergencies such as diabetic ketoacidosis (DKA), hyperosmolar hyperglycemic state, or symptomatic hypoglycemia. These require emergency care.
How type 2 diabetes is treated
Treatment is individualized and typically involves a combination of lifestyle modification and medication:
- Metformin: first-line medication for most people with type 2 diabetes; reduces hepatic glucose production and improves insulin sensitivity; modest weight benefit
- GLP-1 receptor agonists (semaglutide, tirzepatide, dulaglutide): reduce blood sugar and produce significant weight loss; also have cardiovascular and kidney-protective benefits in people with established disease
- SGLT2 inhibitors (empagliflozin, dapagliflozin): reduce blood sugar by promoting glucose excretion in urine; have cardiovascular and kidney benefits
- Insulin: required for some patients; managed in close coordination with in-person care
Lifestyle modification — structured dietary changes, regular physical activity, and weight management — is a cornerstone of diabetes treatment and in early or prediabetes stages can be more powerful than medication alone.
Frequently asked questions
Can telehealth diagnose diabetes?
Not without lab work. Diagnosis requires a confirmed HbA1c of 6.5% or higher, or fasting glucose of 126 mg/dL or higher, on two separate occasions. The clinician can order these tests and interpret results with you by telehealth.
Can type 2 diabetes be reversed?
In some cases, particularly with early diagnosis and significant weight loss, blood sugar can return to normal range without medication. This is sometimes called remission rather than cure, as risk of recurrence remains. GLP-1 agonists combined with lifestyle change produce the most consistent results.
Is metformin safe for kidneys?
Metformin is generally safe in people with normal or mildly reduced kidney function. It is held or dose-reduced when eGFR falls below 45, and stopped below 30. Kidney function is checked before and periodically during treatment.
Do I still need to see my primary care provider?
Yes. Telehealth complements but does not replace in-person primary care for people with diabetes. Regular in-person visits allow foot exams, eye exams, blood pressure monitoring, and other important components of diabetes care.