Diet Soda (1 Can (12 Fl Oz))

Confirm the pattern by repeating the test on separate days under similar conditions; diet soda usually has little direct glucose content, so timing, stress, sleep, illness, or a recent meal may be contributing.

Try a caffeine-free, unsweetened sparkling water in place of the diet soda for 1–2 weeks, then compare your glucose response; caffeine can raise glucose in some people.

Avoid drinking diet soda on an empty stomach or alongside a carbohydrate-heavy meal; have water first and keep the meal balanced with protein, non-starchy vegetables, and healthy fats.

Check the specific sweeteners in the product and trial a different formulation or plain flavored sparkling water, since responses can vary between individuals.

Take an easy 10–20 minute walk after drinking it or after the associated meal, if this is safe for you; light activity can reduce post-meal glucose rises.

If the rise is repeated, substantial, or you use glucose-lowering medication, review the readings and timing with your clinician or diabetes educator before making medication changes.