Pink Urine: Beetroot, Blood, or Something Else?

The Pink Urine Question: Food or Blood?

Pink urine creates more anxiety than almost any other colour change, because the explanation can be completely trivial (beetroot) or genuinely significant (blood in the urine). The good news is that distinguishing between them is usually straightforward if you think through what you have eaten and when.

Beeturia is the medical term for pink or red urine caused by eating beetroot. It affects approximately 10-20% of the population - a genetic variation in how the small intestine absorbs betalain, the red-purple pigment in beetroot. In most people, betalain is broken down in the gut before it can be absorbed. In those with beeturia, it passes into the bloodstream largely intact and is filtered out by the kidneys, producing pink to red urine.

Beeturia typically appears within two to eight hours of eating beetroot and clears within 24-48 hours of stopping. It is completely harmless. However, beeturia can occasionally mask genuine haematuria - if you have blood in your urine and you eat beetroot, you might attribute the pink colour to the beetroot rather than investigating a real problem. The safest approach: if you are uncertain, stop eating beetroot and check again. If the pink clears within 48 hours, it was beeturia. If it does not, see your GP.

Haematuria (blood in urine) producing pink urine is typically "microscopic" rather than the brighter red of gross haematuria. A small amount of blood can make urine appear distinctly pink without being visibly red. Causes include UTI (the most common), kidney stones passing, kidney or bladder injury, and in some cases kidney or bladder disease.

Other Causes of Pink Urine

• -Blackberries and bilberries: Anthocyanin pigments in dark berries can produce pink urine in some people, particularly after large servings. Less common than beeturia but follows the same mechanism.
• -Phenazopyridine at lower doses: Typically produces orange-red, but at lower doses or in some individuals can appear more pink-orange.
• -Rhubarb: More often causes brown urine, but can occasionally produce a pinkish tint in some individuals.
• -Myoglobin from muscle breakdown: Intense exercise can occasionally produce pink-tinged urine from myoglobin (muscle protein) - different from haematuria but similarly warrants a check if it persists.

UTI and Pink Urine

A urinary tract infection is one of the more common causes of microscopic blood in urine, producing a faint pink tinge. UTI-related pink urine is almost always accompanied by other symptoms: burning or stinging on urination, increased frequency and urgency, cloudy or strong-smelling urine, and sometimes suprapubic discomfort.

If your urine is pink and you also have those symptoms, the UTI needs assessment regardless of the colour question. At-home urine test strips (leukocyte esterase and nitrite detection) can provide initial confirmation, though they are not perfect - a GP visit or telehealth consultation is appropriate for diagnosis and treatment. See the UTI signs page for a full guide.

Frequently Asked Questions