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  1. Type 1 diabetes - Symptoms and causes - Mayo Clinic

    Mar 27, 2024 · Different factors, such as genetics and some viruses, may cause type 1 diabetes. Although type 1 diabetes usually appears during childhood or adolescence, it can develop in …

  2. Type 1 Diabetes: What It Is, Causes, Symptoms & Treatment

    Type 1 diabetes is a chronic (lifelong) autoimmune disease that causes a lack of insulin, an essential hormone. It requires daily management with insulin injections and glucose monitoring.

  3. Type 1 Diabetes | Diabetes | CDC

    May 15, 2024 · Type 1 diabetes is thought to be caused by an autoimmune reaction (the body attacks itself by mistake). This reaction destroys the cells in the pancreas that make insulin, …

  4. Type 1 Diabetes: Causes, Symptoms, Treatments & Diagnosis - WebMD

    Apr 19, 2024 · Type 1 diabetes happens when your immune system destroys cells in your pancreas that make insulin. Learn more about the symptoms, causes, diagnosis, treatment, …

  5. Understanding Causes & Risk Factors of Type 1 Diabetes (T1D)

    Mar 4, 2025 · Learn about the causes and risk factors of Type 1 Diabetes (T1D). Discover key triggers, genetic links, and prevention insights to manage your health.

  6. Understanding Type 1 Diabetes | ADA

    When you have type 1 diabetes, your immune system mistakenly treats the beta cells in your pancreas that create insulin as foreign invaders and destroys them. When enough beta cells …

  7. Causes and Risk Factors of Type 1 Diabetes - Health

    Oct 3, 2025 · Type 1 diabetes is an autoimmune disease in which the immune system attacks cells in the pancreas that make insulin. Both genetic and environmental factors, like viral …

  8. Type 1 Diabetes - NIDDK

    Type 1 diabetes develops when the body’s immune system destroys the cells in the pancreas that make insulin. When the immune system attacks healthy cells in your body, it’s called …

  9. The Causes of Type 1 Diabetes - Everyday Health

    Sep 26, 2025 · Type 1 diabetes is a genetic, autoimmune condition in which the body’s immune system mistakenly attacks and destroys the cells in the pancreas that produce insulin. Without …

  10. Type 1 diabetes mellitus - Harvard Health

    Jun 25, 2025 · Type 1 diabetes occurs when some or all of the insulin-producing cells in the pancreas are destroyed. This leaves the patient with little or no insulin. Without insulin, sugar …