Lack of physical activity and high caloric diet are main causes for increasing diabetes prevalence. Thus, it is possible to influence blood glucose levels by lifestyle modifications. Coffee is an important lifestyle factor in Germany with a mean consumption of about 150 litres per inhabitant. It is important to know that coffee cannot be equated with caffeine. Scientific investigations have shown that caffeine can temporarily have a negative impact on cardiovascular risk factors but does not promote development of cardiovascular events. On the other hand, several international prospective studies demonstrate a protective effect of coffee on the development of type 2 diabetes as coffee consumption can reduce glucose uptake. Coffee components, e.g. chlorogenic acid, play a central role, as they can inhibit oxidative stress and inflammation in addition. In the context of lifestyle tasks coffee consumption therefore is an additional option for modifying diabetes risk.