Fibroblast growth factor 21 and fructose dynamics in humans

Area of Science:

• Human physiology
• Metabolic disease research
• Endocrinology

Background:

• Fructose consumption is linked to metabolic disease.
• Fibroblast growth factor 21 (FGF21) is a hormone regulating lipid and glucose metabolism.
• Previous studies showed acute FGF21 stimulation by 75g oral fructose.

Purpose of the Study:

• To investigate the dose dependency of FGF21 response to oral fructose.
• To assess the reproducibility of FGF21 response to fructose.
• To deepen understanding of FGF21 fructose dynamics in humans.

Main Methods:

• Healthy lean adults consumed five different doses of fructose.
• Fructose doses were administered orally in water.
• Each dose was separated by 2 weeks; some doses were repeated weekly for reproducibility.

Main Results:

• FGF21 levels peaked 2 hours post-consumption, in a dose-dependent manner.
• No significant FGF21 increase occurred with 10g fructose; robust increases were seen with 30g, 50g, and 75g.
• The 75g fructose dose elicited the highest FGF21 fold change, with all subjects showing at least a doubling.

Conclusions:

• The FGF21 increase following oral fructose is dose-dependent and peaks at 2 hours.
• The FGF21 response to 75g fructose is reproducible within individuals.
• Findings enhance understanding of FGF21 physiology in relation to fructose intake.