The pH of urine can be determined during a urine test and this particular urine test can also be performed at home. A variation of the pH value of your urine can indicate certain health conditions, which may warrant further investigation.


What is the normal pH of blood, urine, and saliva?

The measure of acidity of a substance is known as pH. Pure water, which has pH of 7, is neutral. Substances with a pH less than 7 are considered acidic and substances with a pH of greater than 7 are considered basic. The normal pH of blood running through arteries (large elastic-walled blood vessels that carry blood from the heart to other parts of the body) is 7.4; the pH of blood in the veins (vessels that transports blood to the heart) is about 7.35. Normal urine pH averages about 6.0. Saliva has a pH between 6.0 and 7.4.

The lower the pH, the greater the acidity of a solution; the higher the pH, the greater the alkalinity. 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.


A pH below 7 indicates acidic urine. Uric acid, cystine and calcium oxalate crystals become kidney stones in an acid urine. Alkalinisation of the urine (making the urine have a pH greater than 7) is an important part of the therapy to prevent stones from recurring. In an alkaline urine (pH above 7), struvite and calcium phosphate crystals become stones. Patients with metabolic acidosis and uncontrolled diabetes excrete urine containing large amounts of acid. An alkaline urine is excreted after consuming a diet high in vegetables, fruits, and dairy products and due to certain organisms causing a urinary tract infection.

What is Involved in the test?
Your REAL THERAPIES CLINIC Practitioner may advise you to stop taking certain drugs that can affect the results of the test. The test checks the ability of the kidneys to regulate acid-base status. Eat a normal, balanced diet for several days before the test. The test involves only normal urination, and there is no discomfort.