Normal Urine pH
According to the American Association of Clinical Chemistry, the mean value of urine pH is 6.0, but it can range from 4.5 to 8.0. Urine below 5.0 is acidic, and urine above 8.0 is alkaline. Normal urine is weakly acidic, but it can also be neutral or weakly alkaline. The pH of urine depends largely on the type of diet, drugs taken and type of disease.
The food a person eats is one of the main factors that affect the pH of the urine. Before evaluating urine pH results, a doctor will likely ask about the foods a person typically eats.
Alkaline foods include:
●High protein food
Acidic foods include:
If a person has a high urine pH, it means it is alkaline, which can be a sign of an adverse health condition, such as:
●Urinary tract infection
Also have a higher urine pH if the vomiting has been prolonged
Acidic urine can also create the environment in which kidney stones form. If a person's urine has a low pH, which means it's more acidic, there are several possible health issues:
●Diabetic ketoacidosis, a complication of diabetes
Taking certain medications may also make a person's urine pH more alkaline or acidic, in which case consult your doctor.
Why We Need to Test Urine pH?
1. When the pH value exceeds 7, it may be a signal of urinary tract infection or other infections. At this point, the doctor will make a diagnosis by considering the urine pH and other symptoms.
2. When studying the effectiveness of kidney stone treatment, a urine pH test is done.
3. Medications, such as carbonic anhydrase inhibitors (acetazolamide), can make the urine alkaline, so the doctor can take more than one sample to see if the pH is changing.
4. Checking the pH value of urine can fully reflect whether the body has a tendency to become acidic. At the same time, testing the pH value of urine can also reflect whether one's recent diet structure is reasonable.
5. Low or high urine pH is a signal to a person’s health. However, due to many factors affecting urine pH, urine pH measurement often has no obvious clinical significance when used independently. It is generally used in conjunction with other items Combined with a comprehensive judgment of changes in the patient's condition or for monitoring.
How to Test?
A urinalysis has three main components:
1. Visual inspection: When a doctor or lab technician examines urine, they check for the color of the urine, the presence of foreign material such as blood in the urine, and whether the urine is foamy.
2. Microscopy: A lab technician will examine a small amount of urine under a microscope to look for particles such as red blood cells, crystals, or white blood cells. These are usually not present in the urine and can indicate an underlying medical condition.
3. Test paper test: judge the acidity or alkalinity of the urine by the color change of the test paper. The color can also change if other substances are present in the urine, such as glucose, white blood cells, bilirubin, or protein.
Testing urine can help diagnose disease. A doctor may perform a urine pH test as part of a larger urinalysis test or specifically to measure the pH of the urine.