I don't like the after taste of Diet soda. I probably drink water instead. Regular soda bad enough, But long as you limit it to one day I don't think it's problem, but I don't know how the chemical leaves the body, if it does?. I worked with guy that brought Coke Big Gulp (outlawed in NYC????
) before work. Filled it up at morning break, lunch, afternoon break, and before he left for home. He done that the 20 years I worked with him. But he is just now in his early 60s now?