Put down your cups. Alternatively, at minimum, put them down till at once after the morning meal.

Emerging research from the Center for Nutrition, Exercise & Metabolism at the University of Bath has revealed that drinking coffee after the breakfast is far better for having healthy blood sugar levels after a night of inadequate sleep.

Reference

Drinking coffee before breakfast could have negative effect on blood glucose control, study suggests. https://www.foxnews.com/food-drink/drinking-coffee-before-breakfast-negative