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Decaffeinated coffee and glucose metabolism in young men. pdf attached
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Dowload the PDF Here
Diabetes Care Nov 2009
1. James A. Greenberg, PhD (jamesg@brooklyn.cuny.edu)1,
2. David R. Owen, PhD2 and
3. Allan Geliebter, PhD3
1 - Department of Health & Nutrition Sciences, Brooklyn College of the City University of New York, New York City, NY, USA
2 - Department of Psychology, Brooklyn College of the City University of New York, New York City, NY, USA
3 - Department of Psychology, Columbia University & New York Obesity Research Center, St. Luke's-Roosevelt Hospital Center, New York City, NY, USA
Abstract
Objective: The epidemiological association between coffee drinking and decreased risk of type 2 diabetes is strong. However, caffeinated coffee acutely impairs glucose metabolism. We assessed acute effects of decaffeinated coffee on glucose and insulin levels.
Research design and methods: Randomized cross-over placebo-controlled trial of the effects of decaffeinated coffee, caffeinated coffee and caffeine on glucose, insulin and glucose-dependent insulinotropic polypeptide (GIP) levels during a two-hour oral glucose tolerance test (OGTT) in eleven young men.
Results: Within the first hour of the OGTT, glucose and insulin were higher for decaffeinated coffee than for placebo (p<0.05). During the whole OGTT decaffeinated coffee yielded higher insulin than placebo, and lower glucose and a higher insulin sensitivity index than caffeine. Changes in GIP could not explain any beverage effects on glucose and insulin.
Conclusions: Some types of decaffeinated coffee may acutely impair glucose metabolism, but less than caffeine.
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