Is Diet soda good for you?
Diet soda is a beverage. It has about 0 g net carbs and 0 g protein per 100 g. Here's how Susta judges it — and why the answer changes with your goal.
Diet soda: verdict by goal
The details
Blood sugar: A bridge, not a habit. Near-zero acute glucose impact makes diet soda a real harm-reduction step OFF sugary soda — if you're quitting cola, this is a win. But the WHO (2023) guideline cautions against relying on non-sugar sweeteners long-term for weight or health, and the sweetness keeps the sweet tooth trained. So: use it to get off sugar, then keep migrating toward sparkling water with citrus — don't let it become the new daily habit.
How to choose: Fine as a step-down from regular soda; keep migrating toward sparkling water.
How to use it: —
How to store: —
Sensible portion: occasional, occasional
See how Diet soda fits your goal
Susta judges every food for your specific health goal — free, on-device, with the cited evidence behind it.
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Susta gives general wellness information graded by evidence — not medical advice, diagnosis, or treatment, and never medication advice. Verdicts are tuned to a chosen goal and may differ for you. Talk to your clinician about your health.