Nondiabetic

Nondiabetic is a term used to describe a person who does not have diabetes mellitus or related disorders of glucose regulation. It indicates that, based on standard diagnostic tests, the individual's blood glucose levels do not meet criteria for diabetes and do not fall within ranges typically associated with prediabetes.

Diabetes is diagnosed when any of several criteria are met: fasting plasma glucose of 126 mg/dL (7.0 mmol/L) or higher, a 2-hour plasma glucose of 200 mg/dL (11.1 mmol/L) or higher after a 75-gram oral glucose tolerance test, HbA1c of 6.5% or higher, or a random plasma glucose of 200 mg/dL (11.1 mmol/L) or higher in a person with symptoms of hyperglycemia. Prediabetes includes fasting glucose of 100–125 mg/dL, 2-hour glucose of 140–199 mg/dL, or HbA1c of 5.7%–6.4%. A nondiabetic person tests below these thresholds.

In practice, being nondiabetic does not guarantee optimal health or the absence of risk factors. Individuals without diabetes may still have obesity, hypertension, dyslipidemia, or impaired glucose tolerance that does not yet meet diabetes criteria. Regular screening and risk assessment are advised for adults, especially those with a family history of diabetes, obesity, or other metabolic risk factors. Lifestyle factors such as a balanced diet, regular physical activity, weight management, and avoidance of tobacco can influence future diabetes risk.

See also: Diabetes mellitus; Prediabetes; Glucose tolerance tests.