Avoid coffee during a fast food meal because it could have dangerous repercussions for your wellbeing as it causes a spike in blood sugar levels. A healthy person’s blood sugar levels shoot up after eating a high-fat meal, but that spike doubles after having both a fatty meal and caffeinated coffee – jumping to levels similar to those of people at risk of diabetes, says Marie-Soleil Beaudoin from University of Guelph. “The results tell us that … full story