Sucralose and Acesulfame K are among the most-tested and most-used sugar substitutes worldwide. Both have an excellent safety profile.
Numerous scientific studies demonstrate that these substances are safe for use as sweetening ingredients. The safety of these non-nutritive sweeteners has been evaluated by regulatory bodies all over the world, and both Sucralose and Acesulfame K are permitted by Health Canada to be used as sweeteners.
Health authorities rely on the safety evaluations of independent scientific advisory bodies such as the Joint FAO/WHO Expert Committee on Food Additives (JECFA).
You can find more information about the ingredients of Red Bull Sugarfree here.