The pH or the human body is very closely controlled by the kidney and the lungs. The pH of arterial blood (oxygen rich) if 7.40 ± .05
The pH of urine however is much different, in that it varies significantly day to day and from hour to hour.
Some physicians recommend the "Alkaline Diet", although this is not universally accepted. Here is information on foods that cause your pH to be higher (alkaline) and lower (acidic)
http://www.energiseforlife.com/list_of_alkaline_foods.php
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