causes of diabetes mellitus

Diabetes has different roots in its different types - one autoimmune, one woven from genes and lifestyle, one hormonal. Knowing which engine drives yours shapes the response.

Type 1: the autoimmune strike

• The immune system attacks the pancreas's insulin-producing beta cells - the trigger is not fully known (genetic susceptibility plus likely viral or environmental factors)
• Not caused by sugar eating, not caused by parenting, not preventable by any current knowledge

Type 2: genes meet lifestyle

• Family history: the single strongest risk - one diabetic parent roughly doubles the risk
• Abdominal obesity: belly fat actively drives insulin resistance - the waist measurement predicts better than the weighing scale
• Physical inactivity: muscle that moves clears glucose; muscle that rests resists insulin
• Age, poor sleep, chronic stress, and certain medicines (long steroids) add to the pile
• The Indian pattern: genetic susceptibility plus visceral fat at lower body weights - "thin outside, fat inside"

Gestational diabetes