Insulin levels in type 2 diabetes: what they mean

Insulin is a hormone made by the pancreas. It helps glucose move from the bloodstream into cells for energy. In type 2 diabetes, body tissues may respond poorly to insulin, so the pancreas often releases more to compensate. A single insulin result does not describe the whole condition: glucose, long-term glucose testing, medicines, meal timing and kidney function can all affect interpretation.

A low result does not automatically mean type 1 diabetes, and a high result does not by itself show that treatment is failing. Your clinician interprets the result alongside your symptoms and other tests. High glucose over time can affect the eyes, kidneys, nerves and blood vessels; related topics include Chronic Kidney Disease, Peripheral Neuropathy and Peripheral Arterial Disease.

Take diabetes medicines exactly as prescribed and keep a record of glucose readings, meals, activity and any symptoms. Do not change insulin or stop another medicine because of one laboratory result. Regular meals, movement suited to your health, sleep and support with weight management can improve the way your body responds to insulin. Ask whether your monitoring schedule needs changing and whether kidney checks or other routine reviews are due.

Contact your diabetes team promptly for repeated high readings, vomiting, marked drowsiness, dehydration, or difficulty keeping medicines and fluids down. Seek urgent help for confusion, fainting, severe breathing difficulty or a seizure. Shaking, sweating, hunger, dizziness or confusion may indicate Hypoglycaemia, especially after insulin or some glucose-lowering medicines; treat it according to your personalised plan and seek help if it does not improve.

Ask: What did my insulin result mean alongside my glucose results? Could any medicine, fasting period or kidney problem have affected it? How will we know whether my current treatment is working? Which symptoms should prompt a same-day call?