Diabetes mellitus type 1 (also known as
type 1 diabetes, or
T1D; formerly
insulin-dependent diabetes or
juvenile diabetes) is a form of
diabetes mellitus that results from the
autoimmune destruction of the
insulin-producing
beta cells in the
pancreas. The subsequent lack of insulin leads to increased blood and urine glucose. The classical symptoms are
polyuria (frequent urination),
polydipsia (increased thirst),
polyphagia (increased hunger) and weight loss.