Lactate Linked to Hormone Release During Exercise
Researchers discovered that lactate regulates the release of FGF21 from the liver during physical activity.
Updated on Oct. 3, 2026 in Nutrition
A recent study identified lactate as a primary driver for the release of fibroblast growth factor 21 (FGF21) during exercise. This finding suggests a new mechanism by which physical movement influences metabolic processes.
Why it matters
Understanding how exercise triggers hormonal responses like FGF21 release is critical for developing new strategies to support metabolic health. The study specifically investigated if this hormone plays a functional role in promoting lipolysis during physical activity.
Lactate administration successfully increased serum FGF21, hepatic FGF21, and AMPKalpha protein levels. Conversely, the attenuation of exercise-induced hyperlactatemia using dichloroacetate reduced serum FGF21 levels and hepatic expression.
The players
Wistar rats
These laboratory animals serve as the primary model for scientific studies regarding metabolic and physiological responses to exercise.
The details
The study utilized male Wistar rats to observe physiological changes across control, exercise, and pharmacological intervention groups. Results showed that exercise upregulates specific receptors in subcutaneous fat, while recombinant FGF21 administration triggered lipolytic gene activation.
Timeline
The findings were formally published on October 3, 2026.
The Big Picture
This discovery fundamentally shifts the trajectory of research surrounding the FGF21 metabolic signaling pathway. By identifying lactate as a mediator, the study provides a new bridge between exercise physiology and molecular hormone regulation.
While this research remains in the preclinical phase, it clarifies the complex biological signals generated during physical activity. These insights may eventually inform new therapeutic approaches for metabolic conditions by targeting the body's natural hormonal pathways.
The takeaway
This study highlights the intricate connection between physical exertion and hormonal signaling in the liver. Understanding these natural pathways helps clarify why regular movement is essential for maintaining healthy metabolism.
Further reading
For more on the latest research in this field, visit our Nutrition section.
More information
View the complete peer-reviewed research article for a full breakdown of the experimental results.
Source note: This article includes information reported by Nature.
