8 glasses is fine if your mr Or mrs average, but if you are over weight (like me)and / or larger than average you might still need more fluids than the average a rough calculation guide is for every 22-25 kgs you need 1 litre of water(45-50 lb = near 2 pints) with this scale never over hydrate, always benefit the doubt in favour of less. you also need to balance this with natural unprocessed sea salt, get this balance you will remove more toxins from your system,& believe it or not your blood presure will healthy when done right eg mine went from 150/80 to 124/66 in five months.To extrapolate on the fuel thing,
lets say fuel has 80 different chemicals in it which makes up our regular unleaded, premium might have say 100 chemicals,but you know if youve used premium on a regular basis some times the car doesn't seem to do as good as it did previously. it's because the mix wasnt as spot on for the conditions as it was before. Dizzyness & fatigue can also be relative to stress & adrenal insufficiency. A detox regime can always be a good place to start with any ailment, a bit like replacing a blocked muffler - lets all the junk get away better!( retired auto mechanic).