Foods as Modulators of GLP-1 Secretion
Abstract
Background/Objectives: Glucagon-like peptide-1 (GLP-1), which is released by enteroendocrine L-cells, is the primary incretin hormone and plays a pivotal role in glucose regulation, appetite control, and metabolic health. While GLP-1 receptor agonists offer significant therapeutic benefits, there is a growing interest in identifying foods that can increase endogenous GLP-1 production through physiological processes. However, the physiological impact of modulating GLP-1 through diet is modest compared with activating GLP-1 receptors pharmacologically. This narrative review summarizes the latest reports on how specific food matrices and gut microbiota-dependent pathways influence GLP-1 release, emphasizing their importance in precision nutrition. Methods: Literature published between 2001 and 2026 was reviewed, including experimental, clinical, and translational studies examining the effects of foods on GLP-1 secretion, L-cell activation, nutrient-sensing receptors, microbial metabolites, and metabolic outcomes. Evidence was synthesized for food categories such as fermented dairy products, fermented vegetables, whole grains, legumes, fiber-rich root vegetables, berries, grapes, green tea, turmeric and oily fish. Results: Foods modulate endogenous GLP-1 secretion through complementary pathways involving L-cell stimulation and the activation of receptors, including FFAR2, FFAR3, GPR119, TGR5 and FFAR4 (GPR120), as well as the production of microbial metabolites. Fermented dairy…
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