Is Diet Soda Keto? Zero-Sugar Soda, Carbs and WHO Advice

In this article

Editorial update: September 29, 2026. Text prepared with AI support from the indicated sources. No independent clinical review. General information, not an individual meal plan.

Short answer

Regular soda is out: the ketogenic diet cuts added sugars, and cola has 8.7 g of carbohydrate per 100 g. In zero versions, sugar is swapped for sweeteners, so the carb count depends on the label. And WHO advises against using sweeteners as a strategy to control weight.

How much carbohydrate does regular soda have?

The Brazilian reference table (TACO) does not list the zero versions.

And zero soda?

The relevant figure is the nutrition label on the can or bottle: check the carbs before counting. The ingredient list shows the sweeteners used. Among the drinks that keto lists summarized by Harvard include are coffee and tea without sugar; added or natural sugar in foods and drinks is excluded.

What WHO says about sweeteners

In 2023, the World Health Organization recommended not using non-caloric sweeteners as a way to control weight: the evidence review suggests they do not provide long-term benefit in reducing body fat in adults and children. The recommendation covers common sweeteners such as acesulfame K, aspartame, advantame, cyclamates, neotame, saccharin, sucralose and stevia; it does not apply to polyols (sugar alcohols). It is conditional and does not apply to those who already have diabetes.

Anyone with diabetes or on medication should combine any change with their doctor. To start keto calmly, see the step-by-step guide. Precautions before starting are in risks and cautions of the ketogenic diet.

Sources

• Harvard T.H. Chan School of Public Health, The Nutrition Source: Diet Review: Ketogenic Diet for Weight Loss
• World Health Organization (2023): WHO advises not to use non-sugar sweeteners for weight control
• TACO – Brazilian Food Composition Table, 4th revised and expanded edition (NEPA/Unicamp)