I think most people on here wouldn't drink diet coke anyway for health reasons. However I have read that Aspartame can affect blood sugar levels as it confuses the body. Somebody may be able to give a more scientific explanation than that if you wanted one. Other than that, just avoid the nasty stuff!
Perseverance is not a long race; it is many short races one after the other.
I am a horse for a single harness, not cut out for tandem or teamwork; for well I know that in order to attain any definite goal, it is imperative that one person do the thinking and the commanding. Albert Einstein