I've always felt an aversion to chlorine tap water-- especially as a kid.
We are fortunate to have well-water in my rural neighborhood. I dont even feel too safe drinking that- though it does taste a heck of a lot better at least.
As for the Sugar and immune system-- come to think of it- When I was a kid, I would always get really sick right after Halloween and Easter right after binging on my trick-or-treat candy or my Easter Basket candy.
This was every year too. For 1 year now, I have finally awakened to the destruction of Sugar and flour in the human body. Found Im getting alot less migranes as a result. Though it will be some time before my other medical problems are healed.