Diet Coca-Cola (Can) (Coca-Cola) (1 Serving)

Check whether the rise repeats on several occasions; diet cola typically contains little to no carbohydrate, so hydration, recent meals, stress, exercise, or sensor variability may be contributing.

Try caffeine-free diet cola or reduce the serving size, since caffeine can raise glucose in some people by increasing stress-hormone signaling.

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

Choose water, sparkling water with lemon or lime, or unsweetened herbal tea most often, and reserve diet cola for occasional use.

Review the timing of the rise: compare it with your previous meal, sleep, stress, and activity rather than assuming the drink alone caused it.

If you repeatedly see significant or concerning rises despite these changes, discuss your readings and medication plan with a clinician.