GLP-1 is released from intestinal L cells after meals, promoting insulin secretion (the incretin effect), suppressing glucagon secretion, delaying gastric emptying, and sending satiety signals to the brain. This combination makes GLP-1 a multifaceted hormone in metabolic regulation.

GLP-1 Physiological Actions

GLP-1 is released from intestinal L cells after meals, promoting insulin secretion (the incretin effect), suppressing glucagon secretion, delaying gastric emptying, and sending satiety signals to the brain. This combination makes GLP-1 a multifaceted hormone in metabolic regulation.

However, GLP-1 has a short half-life in circulation — only a few minutes. This is a design feature of the body, preventing excessive satiety. Enhancing GLP-1 signalling without drugs requires a different approach.

Slowing Gastric Emptying and Satiety

The rate of gastric emptying determines how quickly nutrients enter the small intestine, which in turn affects GLP-1 release. Slower gastric emptying extends the exposure of L cells to nutrients, prolonging the duration of GLP-1 signalling.

Protein and fibre are the most effective macronutrients for slowing gastric emptying. High-protein diets have been shown to increase GLP-1 secretion, which partially explains why high-protein diets contribute to satiety and weight management.

The Gut Microbiome and GLP-1

The gut microbiome produces short-chain fatty acids (SCFAs) including butyrate, propionate, and acetate. Butyrate has been shown to stimulate GLP-1 release from intestinal L cells. This means the composition of the gut microbiome may influence baseline GLP-1 levels.

Fermented foods and prebiotic fibres support butyrate-producing bacteria, which is associated with better metabolic health markers. This provides a potential intervention target for the gut microbiome-GLP-1 axis.

Why This Matters in the Fight Against Obesity

Obesity is associated with impaired GLP-1 signalling. In adipose tissue, reduced GLP-1 sensitivity means fat cells respond less to insulin signalling. This makes it harder for adipose tissue to store energy efficiently, leading to fat overflow into circulation and ectopic fat deposition.

MetaboDrop supports metabolic health pathways including those involved in satiety regulation and insulin sensitivity.