Iced Americano (1 piece)

Choose a decaffeinated iced Americano or half-caf version; caffeine can raise glucose in some people even without sugar.

Confirm the drink is plain: no syrup, sweetened cold foam, flavored milk, sugar packets, or sweetened creamers.

Avoid drinking it on an empty stomach; have it with a small protein- and fat-containing option such as eggs, plain Greek yogurt, or a small handful of nuts.

Try having the coffee after a balanced meal rather than before breakfast, and compare your glucose response over several occasions.

Reduce the serving size or dilute it with extra ice or water, then assess whether a smaller caffeine dose improves your response.

Take a gentle 10–15 minute walk after drinking it, if safe and practical, to help blunt a rise.