Which type of diabetes is characterized by absolute insulin deficiency?

Type 1 Diabetes is characterized by absolute insulin deficiency due to the autoimmune destruction of the insulin-producing beta cells in the pancreas. This results in little to no insulin production, making it essential for individuals with this type of diabetes to rely on exogenous insulin to maintain blood glucose levels. In contrast, Type 2 Diabetes often involves insulin resistance and a relative deficiency of insulin rather than a complete lack, and it can sometimes be managed with lifestyle changes and oral medications. Secondary Diabetes arises due to specific conditions, such as hormonal disorders or medication effects, and is not solely tied to insulin deficiency. Gestational Diabetes occurs during pregnancy and is typically a temporary condition related to hormonal changes, often resolving after childbirth. Thus, the defining characteristic of Type 1 Diabetes is the absolute lack of insulin production, making it distinct from the other types mentioned.