THe simple truth is, Diet COke, COke Zero, etc., AND Diet drink promotes weight gain!!! GOOGLE effects of Diet Coke or something and you will see that it actually causes you to put weight on - it increases cravings, ruins your bones, it is toxic stuff.
I was ADDICTED to it big tie - loved it - but did LL in 2008 and have not had a drop since then. It is what it does to you health and nody that puts me off it.
Too each their own, but you cannot say you have done LL 100% faitfully if you drink it.
IT is cheating.