Insulin is a hormone made by the pancreas.

What is the main function of insulin?

insulin helps move glucose (sugar) from the blood to muscles and other tissues. Insulin controls blood sugar levels.

Metabolic weight gain

What is insulin resistance and how does it affect me?

See insulin resistance

How does excess insulin lead to weight gain?

Insulin controls blood sugar by pushing the sugar in to cells – the cells then either store it as fat or use it for energy. If the cells do not remove glucose from the blood, the body will store it in the tissues as fat. When a person takes insulin as a therapy, or they are insulin resistant, their body may absorb too much glucose from food, resulting in weight gain.

Insulin resistance is very common and affects up to 71% of the adult population in the US leading to significant weight gain, sugar cravings and increased risk of diabetes.

What are different types of insulin?

Several types of insulin are available. Each type starts to work at a different speed, known as “onset,” and its effects last a different length of time, known as “duration.” Most types of insulin reach a peak, which is when they have the strongest effect. Then the effects of the insulin wear off over the next few hours or so.

Insulin types
Types of Insulin and How They Work
Insulin typeHow fast it starts to work (onset)When it peaksHow long it lasts (duration)
Rapid-actingAbout 15 minutes after injection1 hour2 to 4 hours
Short-acting, also called regularWithin 30 minutes after injection2 to 3 hours3 to 6 hours
Intermediate-acting2 to 4 hours after injection4 to 12 hours12 to 18 hours
Long-actingSeveral hours after injectionDoes not peak24 hours; some last longer
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Insulin and weight gain frequently asked questions

  • Why does insulin cause weight gain?
  • How does insulin affect body weight?
  • How can I avoid gaining weight on insulin?
  • Can high insulin levels cause weight gain?
  • Does insulin stop fat burning?
  • Does insulin make you retain water?
  • How does insulin get rid of belly fat?
  • What foods spike insulin?
  • How does insulin make you lose weight?
  • How much weight do you gain on insulin?
  • Does insulin increase appetite?
  • Does metformin make you gain weight?
  • What are good insulin levels?
  • Does apple cider vinegar lower insulin?
  • What does high insulin feel like?
  • What triggers fat burning?
  • How do I stop my body from storing fat?
  • How does insulin spike affect weight loss?
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