The Kilcher Homestead is a 600 acre Pioneer Homestead that has been protected for perpetuity via a ConservatIon Easement. The Kilcher Family has also preserved the Historic Cabin and site as a LIving Museum.
Yes, negative pH is possible, but not in water as a solvent. The range of pH in water is 0 to 14 (to be more precise, it is -1.7 to 15.7, but for simplicity's sake, we start with the usual values.) Thus, what pH indicates is the ability of the acid to form H3O+, which can then donate a proton.
The human body works similar to an alkaline battery. Thus, when its overall pH is too acidic, it does not function properly. Your blood pH should be slightly higher than 7.3. If your blood pH level is lower than 7.3, you are at a risk of having too much acid in your blood.