What is a good healthy diet soda?

Zevia- avoid others. In general, there is no such thing as a "healthy diet soda." most diet sodas are extremely unhealthy- sweetened with toxic chemicals & increasing weight! see http://kimberlysnyder.Net/blog/2011/12/01/8-dangers-of-diet-soda/ the only one that may not have these hazards is zevia. However, while certainly less toxic than the others, I am not ready to call it healthy. I advise kombucha. See comment:.
Healthy- soda? Soda and healthy don't necessarily go together in the same sentence. One problem is that sodas are carbonated. Carbonic acid can damage the enamel of your teeth.