It is recommended to test pH levels to determine if body's pH needs immediate attention. By using pH test strips, you can determine your pH factor quickly and easily. If your urinary pH fluctuates between 6.0 to 6.5 in the morning and between 6.5 and 7.0 in the evening, your body is functioning within a healthy range. If your saliva stays between 6.5 and 7.5 all day, your body is functioning within a healthy range. The best time to test your pH is about one hour before a meal and two hours after a meal. Test your pH two days a week.
Urine pH is used to classify urine as either a dilute acid or base solution. Seven is the point of neutrality on the pH scale. The lower the pH, the greater the acidity of a solution; the higher the pH, the greater the alkalinity. The glomerular filtrate of blood is usually acidified by the kidneys from a pH of approximately 7.4 to a pH of about 6 in the urine. Depending on the person's acid-base status, the pH of urine may range from 4.5 to 8. The kidneys maintain normal acid-base balance primarily through the reabsorption of sodium and the tubular secretion of hydrogen and ammonium ions. Urine becomes increasingly acidic as the amount of sodium and excess acid retained by the body increases. Alkaline urine, usually containing bicarbonate-carbonic acid buffer, is normally excreted when there is an excess of base or alkali in the body. Secretion of an acid or alkaline urine by the kidneys is one of the most important mechanisms the body uses to maintain a constant body pH.
The results of saliva testing may indicate the activity of digestive enzymes in the body. These enzymes are primarily manufactured by the stomach, liver and pancreas. While the saliva also utilizes buffers just like the urine, it relies on this process to a much lesser degree. If the saliva pH is too low (below 6.5), the body may be producing too many acids or may be overwhelmed by acids because it has lost the ability to adequately remove them through the urine. If the saliva pH is too high (over 6.8), the body may suffer greatly, e.g. excess gas, constipation and production of yeast, mold and fungus. Some people will have acidic pH readings from both urine and saliva—this is referred to as "double acid."
- An accurate measurement of urinary pH can be done only on a freshly voided specimen.
- During sleep, decreased pulmonary ventilation causes respiratory acidosis. As a result, a first waking urine specimen is usually highly acidic.
- A diet rich in citrus fruits, most vegetables, and legumes will keep the urine alkaline.
- A diet high in meat and cranberry juice will keep the urine acidic.