Caffeine ingestion elevates plasma insulin response in humans during an oral glucose tolerance test.

@article{Graham2001CaffeineIE,
  title={Caffeine ingestion elevates plasma insulin response in humans during an oral glucose tolerance test.},
  author={Terry E. Graham and Premila Sathasivam and Mary Rowland and Natasha Marko and Felicia A. Greer and Danielle S. Battram},
  journal={Canadian journal of physiology and pharmacology},
  year={2001},
  volume={79 7},
  pages={
          559-65
        }
}
We tested the hypothesis that caffeine ingestion results in an exaggerated response in blood glucose and (or) insulin during an oral glucose tolerance test (OGTT). Young, fit adult males (n = 18) underwent 2 OGTT. The subjects ingested caffeine (5 mg/kg) or placebo (double blind) and 1 h later ingested 75 g of dextrose. There were no differences between the fasted levels of serum insulin, C peptide, blood glucose, or lactate and there were no differences within or between trials in these… 
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