Urine pH

Optimal Result: 5 - 7.5 pH.

Urinalysis refers to a series of tests that can be run to assess the chemical quality of the urine. Typically, this is done by dipping a strip into the urine sample, and chemical reactions change the color of the pads. Urine pH is a test that analyzes the acidity or alkalinity of a urine sample. Many diseases, your diet, and the medicines you take can affect how acidic or basic your urine is. For instance, results that are either too high or low can indicate the likelihood that your body will form kidney stones. If your urine is at an extreme on either the low or high end of pH levels, you can adjust your diet to reduce the possibility of kidney stones.

What does it mean if your Urine pH result is too low?

A low urine pH, or more acidic urine, could indicate an environment conducive to kidney stones. Other conditions that prefer an acidic environment are:

- Acidosis

- Dehydration

- Diabetic ketoacidosis

- Diarrhea

- Starvation

What does it mean if your Urine pH result is too high?

A high urine pH, or more alkaline urine, may be due to:

- Kidneys that do not properly remove acids

- Kidney failure

- Stomach pumping

- Urinary tract infection       

- Vomiting


An elevated urine pH is considered alkaline. Normal urine pH levels can range from about 5 to 7.5 (Reference interval by LabCorp), with the average being around 6. A variety of factors can affect urine pH, and while a single urine pH measurement isn't usually cause for concern, consistently alkaline urine can be a sign of certain health conditions or dietary patterns.

Here are some potential reasons for a higher, or more alkaline, urine pH:

→ Dietary Factors: Consuming a diet high in fruits and vegetables can lead to more alkaline urine. Some types of vegetarian diets might result in a higher urine pH.

→ Urinary Tract Infections: Some bacteria, such as Proteus mirabilis, can break down urea into ammonia, which can make the urine more alkaline.

→ Kidney Stones: Certain types of kidney stones are more likely to form in alkaline urine, such as calcium phosphate stones.

→ Medications: Some medications can affect urine pH. For instance, potassium citrate and sodium bicarbonate can make the urine more alkaline.

→ Metabolic or Respiratory Alkalosis: Alkalosis refers to a condition where the body fluids have excess base (alkali). This can be related to systemic issues affecting the kidneys or lungs.

→ Renal Tubular Acidosis: This is a condition in which the kidneys are unable to adequately excrete acids into the urine, causing the blood to become too acidic and the urine to become too alkaline.

→ Hypokalemia: Low levels of potassium in the blood can make the urine more alkaline.

Important note: If the alkalinity of urine is a consistent finding, or if there are other symptoms present, it may warrant further investigation. A healthcare provider can conduct additional tests to determine if the alkaline urine pH is due to a medical condition that needs treatment. It's important to note that urine pH can vary throughout the day and can be influenced by various factors; hence, a single measurement should not be taken as a definitive sign of a problem.

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