And again we return to the question: why the body takes the hydrogen ions when the blood in it is still alkaline? The answer to this question, in my opinion, consists of two parts. Firstly, the fact that hydrogen ions needed by the body - there is no doubt, and this issue is dedicated to all the previous chapter. We are also aware that the acid reaction of urine is a sign of our health (in each polyclinic doctor first acquaintance with the patient begins to study the reaction of urine of the latter). From this we can conclude that our health provided a sufficient amount of hydrogen ions in the blood and the excess of these ions, apparently, and excreted in urine. When the hydrogen ions in the blood is lacking, they are not removed from the body, and it is a sure sign that we are at any time can be ill, if not already sick.