Library/Urine/Urine pH/4.5

Urine pH of 4.5What it means, and what usually happens next

4.5Urine pH
Acidic, within the usual range
5.57.58.5

A urine pH of 4.5 is on the acidic side of the usual 4.5 to 8.0.

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Urine pH4.5
Where it fallsAcidic, within the usual range
The usual range4.5 to 8.0, most often around 6

What usually happens next

A diet high in meat and protein, fasting or a low-carb diet, and not drinking much all make urine more acidic.

Persistently acidic urine favours uric acid stones, so it matters most if you've had kidney stones or gout.

When a urine pH can read wrong

Urine pH changes with your last meal, and a sample left standing for more than an hour or two drifts alkaline. A first-morning sample is usually the most acidic of the day.

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Questions

Is a urine pH of 4.5 normal?

The usual range is 4.5 to 8.0. Inside it, the number mostly reflects what you ate and drank; it's read with the rest of the urinalysis.

Does drinking water change urine pH?

Water dilutes urine but barely moves its pH; diet does more, with meat and protein making it more acidic and fruit and vegetables more alkaline.

Worked out by LifeFrom from the usual urinalysis ranges (American Family Physician), and not yet reviewed by a clinician. For your own understanding: only a lab test, read by your clinician, diagnoses anything.