page 03 1. (continued) Studies have suggested that the chemical caffeine is an inhibitor of glucose transport by GLUT1. Figure 3 shows data obtained from a recent study of the effect of increasing caffeine concentration on the uptake of glucose by GLUT1. The uptake of glucose in these experiments was measured per litre of intracellular fluid. Figure 3 0 0 5 5 10 10 15 15 20 20 Caffeine (mmol/l) Glucose uptake (μmol/l/min) [END OF SUPPLEMENTARY SHEET] page 04 [BLANK PAGE] DO NOT WRITE ON THIS PAGE