Diet soda is just as unhealthy as regular soda. 

 

Although diet soda can have reduced or even zero calories, that doesn't mean that it is free from harmful side-effects. Diet soda is extremely acidic compared to regular soda and can increase gastric-reflux and can damage the gut's good bacteria. It also contains artificial sweeteners, which have been linked to negative side-effects ranging from unregulated diabetes to neurological damage.