Does insulin make you gain weight?

Insulin can contribute to weight gain because it helps glucose enter your cells and allows your body to store excess energy. Weight gain is more likely when calorie intake exceeds your body's needs, but gaining weight is not inevitable when taking insulin.

How much weight can you gain after starting insulin?

Weight gain after starting insulin varies considerably from person to person. Research has reported gains ranging from about 1.8 kg (4 pounds) to 9 kg (20 pounds) during the first year of insulin therapy, although some people gain little or no weight.

Why do some people gain weight when they start insulin?

When insulin treatment improves high blood sugar, the body can begin using and storing glucose more effectively instead of losing calories through excess glucose in the urine. Additional calories, higher insulin requirements, frequent treatment of low blood sugar, and defensive snacking can also contribute to weight gain.

How can I avoid gaining weight while taking insulin?

You can reduce the risk of insulin-related weight gain by controlling portions, choosing balanced meals, avoiding unnecessary high-calorie drinks and snacks, staying physically active, and monitoring your blood sugar. Frequent low blood sugar may indicate that your insulin regimen needs adjustment, so discuss recurring lows with your healthcare provider rather than routinely eating extra calories to prevent them.

Can you lose weight while taking insulin?

Yes. It is possible to lose weight while taking insulin through an appropriate calorie intake, regular physical activity, and a diabetes treatment plan that keeps blood sugar within your target range. Never reduce or skip insulin simply to lose weight, because inadequate insulin can cause dangerously high blood sugar and, particularly in people with type 1 diabetes, diabetic ketoacidosis.