You can buy PH strips at a health food store or aquarium supply store. It really tells you how acidic your body is, and how little alkalinity is left to neutralize toxins.
Distilled water has a negative charge through steaming. It attaches to anything in your body that isn't part of you. There is nothing like it for detox :)
I eat all my food warmed up, never cold. Do you know what dosha you are (ayurveda medicine)?