It is a common myth that coffee causes spikes in blood sugar levels. However, there is no scientific evidence to support this claim. In fact, studies have shown that coffee may actually help to regulate blood sugar levels. One study found that coffee drinkers had a significantly lower risk of developing type 2 diabetes than non-coffee drinkers. Another study found that coffee consumption was associated with lower fasting blood sugar levels. So, if you're worried about how coffee might affect your blood sugar levels, there's no need to worry. Coffee is not likely to cause any spikes in your blood sugar levels. In fact, it may even help to keep them in check.