Coffe Black - Black Coffe (1 cup) and Black coffee (1 cup)

Try decaffeinated coffee or half-caf; caffeine can raise glucose in some people even when the drink contains no sugar.

Drink coffee after a balanced meal rather than on an empty stomach, especially if your readings rise with morning coffee.

Avoid add-ins that can increase glucose, including sugar, flavored syrups, sweetened creamers, and sweetened plant milks.

If you want food with coffee, choose a small portion of protein- and fiber-rich options such as eggs, plain Greek yogurt, or a handful of nuts.

Use a smaller serving or switch from multiple cups to one cup, then compare your glucose response over several days.

Check whether poor sleep, stress, or coffee before exercise is amplifying the effect; changing one factor at a time can help identify your trigger.