Did you know nature's Ozempic is made in the Gut?!

Yep, you heard me right. The hormone that millions are injecting to achieve weight loss and diabetic stability, known as GLP-1, is made by the cells in our gut! GLP-1, or glucagon-like peptide-1, has become a buzzword because of its vital role in metabolism, weight management, and appetite control.

What Is GLP-1?

GLP-1 is a hormone made in the gut, specifically by specialized cells called L-cells in the lower part of the small intestine and colon. When food enters the gut, these cells release GLP-1 as a signal to help the body manage blood sugar and appetite. GLP-1 tells the pancreas to release insulin (lowering blood sugar), slows down how quickly the stomach empties, and sends a signal to the brain to help curb hunger.

How Is GLP-1 Naturally Produced?

GLP-1 is made when L-cells in the gut sense nutrients arriving, the gut's resident microbiota (helpful bacteria) ferment fiber from food, making short-chain fatty acids that further prompt L-cells to secrete more GLP-1. This hormone naturally spikes after eating, especially meals balanced in fiber, fats, and proteins

Glucagon-like peptide 1 (GLP-1) - Scientific Figure on ResearchGate. Available from: https://www.researchgate.net/figure/Schematic-on-the-nutrient-induced-stimulation-of-GLP-1-secretion-in-the-L-cell-CICR_fig2_336174531

Why Does GLP-1 Matter?

GLP-1 acts like a tiny messenger with big jobs. It signals the pancreas to release insulin after meals. Slows stomach emptying, which makes fullness last longer, an important feature in maintaining healthy eating rhythms. It also supports this rhythm by communicating satiety (feeling satisfied) to the brain to help prevent overeating. Lastly, and most helpful to the diabetic population, it helps keep blood sugar from spiking after meals. Because of these helpful effects, medications that mimic GLP-1 are widely used for type 2 diabetes and weight loss. But the natural version of this hormone, which the gut can make with the right support, can be upregulated naturally!

How to Boost GLP-1 Naturally

Certain foods and habits can help the body maximize its own GLP-1 production. Anyone who has attended a lecture of mine knows how much I focus on eating more fiber. Soluble fibers found in oats, barley, beans, lentils, fruits (like apples and pears), and many vegetables support gut bacteria, which in turn help L-cells make more GLP-1 through their fiber fermentation. Lean protein from fish, poultry, eggs, beans, and yogurt prompts a greater GLP-1 response and sustains fullness. Healthy fats from extra virgin olive oil, avocados, nuts, and fatty fish (like salmon and sardines) encourage the gut to release more GLP-1, especially when combined with fiber and protein. The next item is not a shocker coming from me but a healthy gut microbiota is crucial. Fermented foods (like kefir, yogurt, sauerkraut, and kimchi) support good microbes, and specific strains, even Akkermansia muciniphila, may directly raise GLP-1. Ill disucss more on how microbes are involved in just a bit. Flavanols in dark chocolate (in moderation!) may help stimulate GLP-1, but stick to small amounts of 70% cacao or more. Physical activity can naturally boost GLP-1 levels, intense activity appears particularly effective. Reason 15,000 for daily activity!

You know I cant write a blog post without mentioning the role of microbes on this system and boy do they play a role. Gut dysbiosis, an imbalance in gut microbial populations, impairs the healthy function of GLP-1 and L-cells in several key ways. Dysbiosis leads to decreased production of beneficial metabolites (particularly short-chain fatty acids and secondary bile acids) that normally stimulate GLP-1 secretion from L-cells. Lack of these microbial by-products means L-cells receive fewer signals to release GLP-1 after meals. Healthy gut microbiota are essential for the normal circadian rhythm of GLP-1 release. Dysbiosis disrupts this rhythm, which can negatively affect blood glucose control throughout the day.

GLP-1 Resistance

Gut dysbiosis can induce “GLP-1 resistance,” a state in which GLP-1 is produced but the body’s cells (including pancreatic and neural targets) do not respond effectively to its signals. This resistance impairs post-meal insulin response and contributes to metabolic diseases. Species diversity loss and increased inflammation from dysbiosis impair L-cell gene regulation, vesicle cycling, and hormone packaging, reducing their capacity to produce and secrete GLP-1. Reduced beneficial microbial signals may lead to fewer healthy L-cells and dysfunctional secretion. Further, dysbiosis increases gut permeability (“leaky gut”) and inflammatory signals such as lipopolysaccharide (LPS), which negatively affect L-cell health and GLP-1 expression.

Yet, another reason to work on this often overlooked ecosystem that plays such a pivitol role in our overall health and wellness! If you would ever like to schdule a free 15 minute consult with me, Melody, at (404) 671-8499.