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Caffeine increases diabetes patients' blood sugar

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CAFFEINE increases blood glucose levels in patients Type II diabetes, according to a study.
Research conducted in the US on 10 habitual coffee drinkers with the condition found caffeine increased daytime glucose concentration by 0.6 mmol/1 on average.

Results were obtained by measuring blood sugar levels on the patients after taking caffeine and after taking placebo.

Subjects’ nutritional intake was regulated using coded packets of food and took either caffeine tablets or a placebo after breakfast and lunch. The dosage of caffeine was 500mg a day.

Tests revealed daytime glucose levels of 8 mmol/l with caffeine and 7.4 mmol/l with placebo.
Caffeine elevated average glucose concentrations following breakfast (8.7 mmol/l vs 8 mmol/l) lunch (7.8 mmol/l vs 6.8 mmol/l) and dinner (8.6 vs 6.8mmol/l).

Authors concluded: ‘Repeated epidodes of elevated glucose resulting from daily consumption of caffeinated beverages could impair clinical efforts aimed at glucose control and increase risk of diabetes complications.’

Diabetes Care (2008) 31: 1-2
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