What does GLP-1 do in the body?

GLP-1 is a hormone your gut releases after meals. It signals fullness to the brain, slows how quickly the stomach empties, and helps steady blood sugar [1].

How do drugs like Ozempic relate to your own GLP-1?

Semaglutide and its relatives are long-acting copies of the same hormone, engineered so the signal lasts from a day to a week instead of minutes [2]. Your own GLP-1 rises briefly after each meal and is broken down within minutes [1].

Can you raise your own GLP-1 naturally?

You can nudge it. Protein and fiber prompt a stronger GLP-1 response after meals, and the compounds gut bacteria make from fiber help trigger its release [5]. The effect is real but modest. A meal's GLP-1 pulse is gone within minutes, while the drugs hold the signal on continuously [1, 2].

From the blog

Your Body Already Makes GLP-1: The Natural Side of the Ozempic Conversation

July 10, 2026 · Last reviewed August 8, 2026

Written and reviewed by Rev. Dr. LaVeena B. Archers, PhD
Doctor of Natural Medicine · Board-certified in Holistic Functional Medicine and Functional Nutrition
Educational content only. Not medical advice, and never a substitute for your own care. Scope of practice.

Quick answers

What does GLP-1 do in the body?: GLP-1 is a hormone your gut releases after meals. It signals fullness to the brain, slows how quickly the stomach empties, and helps steady blood sugar ^[1].
How do drugs like Ozempic relate to your own GLP-1?: Semaglutide and its relatives are long-acting copies of the same hormone, engineered so the signal lasts from a day to a week instead of minutes ^[2]. Your own GLP-1 rises briefly after each meal and is broken down within minutes ^[1].
Can you raise your own GLP-1 naturally?: You can nudge it. Protein and fiber prompt a stronger GLP-1 response after meals, and the compounds gut bacteria make from fiber help trigger its release ^[5]. The effect is real but modest. A meal's GLP-1 pulse is gone within minutes, while the drugs hold the signal on continuously ^{[1, 2]}.

GLP-1, the hormone that weight-loss injections like Ozempic and Wegovy are built on, is one your own body already makes, every day, in response to what and how you eat ^[1]. The drugs flood the body with a long-lasting copy of that signal ^[2]. Ordinary food, movement and a well-tended gut nudge your own version of it ^[5], which will never match a pharmaceutical dose and is still real and still free.

You cannot open a phone right now without hearing about the injections. That simple fact is what gets lost in the noise.

What is GLP-1?

GLP-1 is a gut hormone. After a meal, your intestines release it, and it does several helpful things. It tells your brain you are full, it slows how fast your stomach empties, and it helps steady your blood sugar ^[1]. The medications work by flooding the body with a long-lasting version of that same signal: your own GLP-1 is broken down within minutes, while the drugs were engineered to keep the signal on for a day to a week at a time ^{[1, 2]}.

What do the GLP-1 drugs actually do?

Let me be even-handed here. For some people, especially those carrying serious health risk, these drugs are close to life-changing, and they deserve to be seen as a legitimate tool rather than a moral failing. In the trial that made semaglutide famous, people lost about 15 percent of their body weight on average over 68 weeks, alongside lifestyle support ^[3], and in people with existing cardiovascular disease it lowered the risk of major cardiovascular events by about a fifth ^[4]. They also are not magic, they come with real considerations, digestive side effects among the most common ^[3], and they work better alongside regular movement than on their own. In one trial of a related GLP-1 drug, liraglutide, adding exercise in the year after a diet-induced weight loss roughly doubled the fat lost and was the only approach that also improved blood-sugar control and fitness ^[6]. Any decision about them belongs with your own prescriber.

How do you support your own GLP-1 naturally?

You can nudge your own GLP-1 with ordinary habits. This will never match a pharmaceutical dose ^{[1, 2]}, and it is still real, and it is free:

Protein and fiber at meals, which prompt a stronger GLP-1 response ^[5]
Whole foods that deliver those two together, high-fiber grains, beans, nuts and eggs among them ^[5]
A well-tended gut, since the compounds its bacteria make from fiber help trigger the signal ^[5]
Movement, which improves how your whole metabolic system responds to its own signals, insulin included ^[7]

This is the same foundation that supports everything else in your health, pointed at one useful hormone.

Drug, natural approach, or both?

The most useful place to stand is in the middle: fair to the medicine, and clear that the natural path supports your own GLP-1 without pretending to replace the drugs. That middle ground is where I part company with the supplements sold as "nature's Ozempic", and it is exactly the ground my next book, Your Body's Own GLP-1, is being written to cover, in full and without hype.

For now, if you want the whole root-cause picture of women's health, the first chapter of Bad Medicine Blues is free. Read a free chapter.

Sources

Holst JJ. The physiology of glucagon-like peptide 1. Physiol Rev. 2007;87(4):1409-1439. doi.org/10.1152/physrev.00034.2006
Knudsen LB, Lau J. The discovery and development of liraglutide and semaglutide. Front Endocrinol (Lausanne). 2019;10:155. doi.org/10.3389/fendo.2019.00155
Wilding JPH, Batterham RL, et al. Once-weekly semaglutide in adults with overweight or obesity. N Engl J Med. 2021;384(11):989-1002. doi.org/10.1056/NEJMoa2032183
Lincoff AM, Brown-Frandsen K, et al. Semaglutide and cardiovascular outcomes in obesity without diabetes. N Engl J Med. 2023;389(24):2221-2232. doi.org/10.1056/NEJMoa2307563
Bodnaruc AM, Prud'homme D, et al. Nutritional modulation of endogenous glucagon-like peptide-1 secretion- a review. Nutr Metab (Lond). 2016;13:92. doi.org/10.1186/s12986-016-0153-3
Lundgren JR, Janus C, et al. Healthy weight loss maintenance with exercise, liraglutide, or both combined. N Engl J Med. 2021;384(18):1719-1730. doi.org/10.1056/NEJMoa2028198
Bird SR, Hawley JA. Update on the effects of physical activity on insulin sensitivity in humans. BMJ Open Sport Exerc Med. 2017;2(1):e000143. doi.org/10.1136/bmjsem-2016-000143

Why Your Own GLP-1 Seems to Stop Working Has your own GLP-1 stopped working? Probably not, and the honest science is more interesting than the folklore: a possibly quieter signal, genuinely contested evidence, and levers worth pulling either way.
When You Eat Matters. The Popular Version Has It Backwards. There is real science showing meal timing affects your metabolism independently of what and how much you eat. There is also a popular protocol built on top of it that points in the wrong direction, and costs you muscle on the way.
Cook It, Cool It, Keep It. The Part Nobody Tells You About Cooled Rice and Potatoes. Cooking starch and cooling it overnight really does change it, and it is a technique I recommend. It also creates the exact conditions behind two of the better documented kinds of food poisoning. Here is how to do it without making yourself ill.

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