GLP-1 Agonists for Weight Loss: How Do They Work?

GLP-1 is an acronym for glucagon-like peptide-1, which is a hormone that is released primarily by certain cells within the small intestine (L-cells) after consumption of food. It allows your body’s organs from the brain to the digestive tract to recognize that you are full and have a full stomach of food ready to be used.
In this blog post, we discuss how GLP-1 drugs function, what is their effect on appetite, blood glucose, and weight loss, and what health benefits they can have, along with their effectiveness and side effects.

What are GLP-1 Agonists?

GLP-1, or glucagon-like peptide-1, is a hormone that occurs naturally in the body. GLP-1 agonists are used to stimulate the natural occurrence of this hormone in order to regulate the level of blood sugar, appetite, and digestion. These medications are used to treat patients suffering from type 2 diabetes and obesity.

How do GLP-1 Medications Work

The GLP-1 mechanism of action consists of several pathways that influence the level of blood sugar, appetite, and digestion. These effects help explain how GLP-1 medications can support metabolic control and weight management. GLP-1 hormone has several roles including:

  • Helps insulin secretion: GLP-1s help the pancreas release more insulin when there is an increased level of glucose in the body. This aids in lowering the blood sugar of individuals with Type 2 diabetes and reduce the levels of glucagon, which increases blood sugar.
  • Delays digestion: GLP-1s delay the process by which food moves out of the stomach. The slower digestion helps in avoiding sudden rise in blood sugar after eating food and hence makes you feel full.
  • Controls hunger: These drugs help in sending signals to your brain that you are full. It helps in reducing the urge to eat and hence helps in losing weight.

Which GLP-1 Medications Are Used for Weight Loss?

A GLP-1 medication for weight loss helps in reducing food cravings and satiety by regulating appetite. Some drugs in this group include:

  • Semaglutide

This medication mimics one of your body’s natural hormones which is typically produced immediately after a large meal. It stays in the stomach for an extended period of time and directly communicates a “stop eating” message to the brain. You are satisfied rapidly; the satisfaction lasts for hours and the need for something to eat is reduced each day.

  • Tirzepatide

Tirzepatide, unlike these drugs, stimulates both the GIP and GLP-1 receptors. It has the same stomach-slowing and brain-signaling properties as Semaglutide, but the second hormone also provides an extra nudge to help your body better process sugars and fats. It targets weight loss from two perspectives. With this dual effect, individuals may lose a bit more weight than with taking Semaglutide alone.

Your weight loss journey shouldn’t be just about diet and exercise. Schedule an appointment with Southdale Physicians to explore personalized treatment options, including GLP-1 medications, when appropriate.

How Long Does It Take for Tirzepatide to Start Working?

There is no single point at which everyone will notice weight loss from Tirzepatide. After taking the drug is absorbed into the bloodstream, changes in appetite, blood glucose and body weight can happen at different times.

According to the FDA prescribing information, Tirzepatide reaches its highest level in the blood in about 24 hours after an injection, although this can range from 8 to 72 hours. It takes about 5 to 6 days for half of the drug to leave the body, which is why it is taken once a week. With weekly doses, the drug builds up to a steady level in the body after about 4 weeks.

When Does Ozempic Start Working?

Ozempic is officially approved drug for the treatment of type 2 diabetes and is also used to protect kidneys and heart. It is not officially approved as a weight loss drug. Another medicine, Wegovy which is specifically approved for weight loss, contains the same ingredients as Ozempic.

After an injection, the drug hits its strongest point in the bloodstream after 1 to 3 days. Since it is taken once in a week, it builds up to a steady level in the body after about 4 to 5 weeks.  Every individual body experiences a little differently, so never take higher doses to get faster results.

Conclusion

Knowing how GLP-1 medications act can provide more clarity about their use in managing weight and blood glucose levels. These medicines may affect one’s appetite, digestion, and metabolism, and they should always be discussed with a doctor regarding their appropriateness, dosing, and potential side effects.

Disclaimer: This article is intended for educational and informational purposes only. Eligibility, choice of GLP-1 medications, dosing, advantages, and disadvantages need to be determined by a healthcare professional.