What is glucagon-like peptide-1 (GLP-1)?

Glucagon-like peptide-1 (GLP-1) agonists increase insulin levels when needed, reduce the amount of glucose produced by the liver and reduce the rate of digestion. As a result, people may have less appetite and lose weight.

Both DPP-IV inhibitors and GLP-1 agonists help glucose remain stable for longer periods and have few side effects. Unlike the sulfonylureas, used decades earlier, these medications do not increase the risk of hypoglycemia.

Whereas GLP-1 agonists used to require several daily injections, they can now be used just once a week.
A GLP-1 agonist is a type of medication used to treat type 2 diabetes. It is taken by injection (shot) using a prefilled dosing pen. A GLP-1 agonist works with other diabetes medications -- pills, not insulin -- to help control your blood glucose. GLP-1 agonists include exenatide (Byetta) and liraglutide (Victoza). Although GLP-1 agonists are taken by injection, they are not insulin and shouldn’t be taken in place of insulin. (They shouldn’t be taken with insulin, either.)

GLP-1 agonists work to control blood glucose by:
  • Inhibiting the release of glucose from your liver
  • Slowing the emptying of your stomach after a meal
  • Helping you eat less, either by lowering your appetite or helping you feel full after a meal
Like other diabetes medications, a GLP-1 agonist works best when you follow the rest of your treatment plan. This means checking your blood glucose regularly, following your meal plan and exercising every day.
Dr. Jack Merendino, MD
Endocrinology Diabetes & Metabolism
Glucagon-like peptide-1 (GLP-1) gets its name from the fact that it is chemically similar to glucagon, but, like insulin, it lowers blood sugar. GLP-1 is made by cells in the intestine after eating, and it travels via the bloodstream to the pancreas, where it increases the amount of insulin that's made and also reduces the amount of glucagon. Several medications available to treat diabetes increase the effects of GLP-1:  Januvia and Onglyza, both oral medications, and Byetta and Victoza, given by injection.
The Best Life Guide to Managing Diabetes and Pre-Diabetes

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The Best Life Guide to Managing Diabetes and Pre-Diabetes

Bob Greene has helped millions of Americans become fit and healthy with his life-changing Best Life plan. Now, for the first time, Oprah's trusted expert on diet and fitness teams up with a leading...

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Diabetes mellitus (MEL-ih-tus), often referred to as diabetes, is characterized by high blood glucose (sugar) levels that result from the body’s inability to produce enough insulin and/or effectively utilize the insulin. Diabetes ...

is a serious, life-long condition and the sixth leading cause of death in the United States. Diabetes is a disorder of metabolism (the body's way of digesting food and converting it into energy). There are three forms of diabetes. Type 1 diabetes is an autoimmune disease that accounts for five- to 10-percent of all diagnosed cases of diabetes. Type 2 diabetes may account for 90- to 95-percent of all diagnosed cases. The third type of diabetes occurs in pregnancy and is referred to as gestational diabetes. Left untreated, gestational diabetes can cause health issues for pregnant women and their babies. People with diabetes can take preventive steps to control this disease and decrease the risk of further complications.

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