What we know that we are healthy or ill ? Always we are take of a great fears. Anxious? Depressive? Stressful? The ph of blood is the principal way which can offer we the tranquility and the health. Normally   the pH is slightly alkaline with the values included between 7,35-7,45 for maintaining a constant balance in metabolism of the acids and the bases. The superior values by (+,-), can to be lethal  development the varies illnesses driving the cellular aging as for example the  tumor , diabetes, attrite and cardiac pathologies. The cause of malaise inhibits the capacity of organism to assimilate the nutritive substance , to produce the new cell, depuration and repair the damaged tissues. The principal methods of control for to make sure that metabolism to find in good health there are the breathing system, urinary and the systems for the swab of blood. For our attention we need know that an ambient acid favors the development of tumor cell  increased the level of fatigue and the diseases. The general malaise comes characterized of the symptoms of the chronic fatigue, scarce concentration, drowsiness , irritability , candidiasis, cellulite, water retention and osteoporosis. The influences of pH is determinate of metabolic activity by organism with the works of muscular tissues, of hormonal anse   and of nutrional assumption with diet.  A diet healthy with the fruits, legumes , fish, eggs, dry fruits , cereals can change the our immune system in good health.