The cover picture shows a coloured scanning electron micrograph of anhydrous caffeine crystals (1,3,7-trimethylxanthine). Epidemiological studies have shown that the consumption of caffeinated and decaffeinated coffee is inversely associated with risk of diabetes development. In the present issue of Diabetologia (54: 320–328), Loopstra-Masters et al. report that caffeinated coffee consumption is positively associated with insulin sensitivity, while decaffeinated coffee consumption is positively associated with measures of beta cell function.
Cover credit: DR JEREMY BURGESS/SCIENCE PHOTO LIBRARY
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