Baking Soda for UTI: Does It Work, and Is It Safe?

By Irene A. Paragas, MD | Medically reviewed | October 2026 | 9 min read

If you are reading this at an uncomfortable hour because it burns to urinate, I understand why you are looking for something in the kitchen cupboard.

So here is the direct answer first.

Baking soda does not treat a urinary tract infection. A Cochrane review examined exactly this question and found insufficient evidence to support it. UK clinical guidance advises against recommending it.

More importantly, a UTI is a bacterial infection. Baking soda does not kill bacteria. It changes the pH of your urine, which is a different thing entirely.

That distinction matters, because an untreated bladder infection can travel upward to your kidneys, and that is a genuinely serious situation.

This article explains what the research actually found, what the warning signs are, and what does work.

What the Research Actually Found

This question has been examined properly, which is more than can be said for most home remedies.

A Cochrane systematic review looked specifically at urinary alkalinisation for symptomatic uncomplicated UTI in women. Cochrane reviews sit at the top of the evidence hierarchy.

That pilot study is the strongest thing anyone can point to, and it is weak. No control arm means improvement cannot be separated from placebo or natural resolution, and many uncomplicated UTIs do resolve without treatment.

The dose is also worth noting. Eight grams of sodium bicarbonate daily is roughly three teaspoons, far beyond what anyone would take casually.

Why It Cannot Treat an Infection

The reasoning behind this remedy sounds plausible, which is why it persists.

The theory goes: UTIs make urine acidic, acidic urine stings, so neutralise the acid and the stinging stops.

There are two problems with that.

Problem one: it treats a sensation, not an infection

A UTI is bacteria multiplying in your urinary tract, usually E. coli that has travelled from the bowel.

Changing urine pH does not kill those bacteria. At best it makes urination less painful while the colony continues growing.

That is the opposite of helpful, because pain is the signal telling you to seek treatment. Dulling it while the infection advances is the mechanism by which this remedy causes harm.

Problem two: alkaline urine is not automatically better

Some bacteria actively prefer alkaline conditions. Proteus species, for instance, raise urine pH themselves as part of how they colonise, and alkaline urine favours the formation of certain kidney stones.

So shifting pH upward is not a neutral act. In some infections it may work against you.

The Risk of Waiting

This is the part that matters most, and it is why I would rather be blunt than diplomatic.

An untreated bladder infection can travel up the ureters to the kidneys. That is pyelonephritis, and it is considerably more serious than cystitis.

From the kidneys, bacteria can enter the bloodstream. That is urosepsis, which can progress to septic shock with falling blood pressure, organ dysfunction and altered consciousness.

There is no reliable timeline for how quickly this happens. It varies enormously between people, which is exactly why waiting to see is a poor strategy.

Who is at higher risk

• Pregnant women. UTIs in pregnancy are treated promptly because of risks to both mother and baby.
• Anyone with diabetes.
• People with kidney disease. All UTIs in chronic kidney disease are considered complicated.
• Older adults, in whom confusion may be the first and only obvious sign.
• Anyone with a urinary catheter or a structural abnormality causing obstruction.
• People who are immunosuppressed.
• Men. UTIs are less common in men and more often indicate an underlying problem, so they warrant assessment rather than home management.

If you are in any of these groups, a UTI is not a home remedy situation at all.

What Actually Works

On cranberry, D-mannose and probiotics

These come up constantly, so briefly and honestly.

The evidence for cranberry products is mixed and relates mainly to preventing recurrent UTIs, not treating an active one. D-mannose has some preliminary research, also in prevention. Neither is a treatment for an infection you currently have.

If you get frequent UTIs, these are worth discussing with your doctor as part of a prevention plan. They are not what you reach for tonight.

If You Are Going to Try It Anyway

Some people will, so here is how to do it with the least risk.

• Do not use it instead of seeking treatment. This is the whole point. Contact a clinician or pharmacist first, then decide about anything else.
• Do not take it with fluoroquinolone antibiotics such as ciprofloxacin without asking your prescriber, because of the crystal formation risk.
• Keep it to a standard antacid dose if you use it at all. Half a teaspoon in at least four ounces of water, not the 8 g daily used in that pilot study.
• Avoid it entirely if you have high blood pressure, heart failure, kidney disease, or are on a sodium-restricted diet. Each half-teaspoon carries roughly 630 to 720 mg of sodium.
• Avoid it in pregnancy without medical advice.
• Stop immediately and seek care if any of the red-flag symptoms at the top of this page appear.

Reducing Your Risk of the Next One

If UTIs are a recurring problem, these measures have reasonable support and are worth building in.

• Drink enough that your urine stays pale. The most consistently useful habit.
• Do not hold urine for long periods. Stagnant urine gives bacteria time to multiply.
• Urinate after sex. A simple mechanical measure that clears bacteria introduced during intercourse.
• Wipe front to back. Most UTIs begin with bowel bacteria reaching the urethra.
• Avoid douches and scented products in the genital area, which disrupt protective flora.
• Raise recurrence with your doctor. Three or more UTIs a year warrants investigation and may justify a preventive strategy. In post-menopausal women, topical oestrogen is sometimes highly effective and under-discussed.

Frequently Asked Questions

Does baking soda cure a UTI?

No. A UTI is a bacterial infection and baking soda does not kill bacteria. It alters urine pH, which may slightly reduce stinging but leaves the infection untouched. A Cochrane review found insufficient evidence to support urinary alkalisers for UTI symptoms.

Will it at least help the burning?

Possibly a little, though the evidence does not support it reliably. Paracetamol or ibuprofen is a better-evidenced option for pain while you arrange treatment, and carries none of the sodium or interaction concerns.

How much baking soda would I take for a UTI?

There is no established dose for this purpose because it is not an established treatment. If you use it at all, keep to a standard antacid dose of half a teaspoon in at least four ounces of water, not the much larger amounts described in the one pilot study.

Can a UTI go away on its own?

Some uncomplicated bladder infections do resolve without antibiotics, which is part of why home remedies appear to work. But there is no way to know in advance which ones will, and the consequences of guessing wrong include kidney infection and sepsis.

How do I know if it has reached my kidneys?

Key signs are fever above 101F, shaking chills, pain in the side or back below the ribs, and nausea or vomiting. Those warrant same-day medical attention. Confusion, rapid heartbeat, difficulty breathing or passing very little urine are emergency symptoms.

Is baking soda safe with antibiotics?

Not necessarily. Alkaline urine reduces the solubility of ciprofloxacin and related fluoroquinolones, which can promote crystal formation. Check with your prescriber or pharmacist before combining anything with a prescribed antibiotic.

What about during pregnancy?

Do not self-treat a UTI in pregnancy. Urinary infections during pregnancy are treated promptly because of risks to both mother and baby, and any suspected UTI should be assessed by a clinician without delay.

Why do I keep getting UTIs?

Common contributors include anatomy, sexual activity, incomplete bladder emptying, menopause-related tissue changes, diabetes and certain contraceptives. Three or more in a year deserves investigation rather than repeated short courses of treatment.

The Bottom Line

Baking soda is not a treatment for a urinary tract infection, and this is one of the rare home remedies where the evidence has actually been examined and come back negative.

A Cochrane review found insufficient support. NICE guidance advises against it. The single supportive study had no control group and did not confirm participants had UTIs at all.

More importantly, it addresses a symptom while the bacteria continue multiplying, and that burning sensation is the signal telling you to get treated.

Drink plenty of water, take a standard painkiller if you need one, and contact a clinician or pharmacist today rather than tomorrow. Uncomplicated UTIs usually respond quickly to the right treatment.

And if you develop fever, chills, back pain, vomiting or confusion, stop reading and seek urgent care. Those are the signs that it has moved beyond your bladder.

References

1. O’Kane DB et al. Urinary alkalisation for symptomatic uncomplicated urinary tract infection in women – Cochrane Database of Systematic Reviews.
2. Effects of urine alkalinization with sodium bicarbonate on lower urinary tract symptoms in female patients: a pilot study.
3. NIDDK – bladder infection and urinary tract infection in adults.
4. Cleveland Clinic – urosepsis causes, symptoms and treatment.
5. Risk factors for urosepsis in chronic kidney disease patients with urinary tract infections – PMC.
6. Centers for Disease Control and Prevention – sepsis signs and symptoms.
7. Urology Care Foundation – urinary tract infections in adults.
8. American College of Obstetricians and Gynecologists – urinary tract infections FAQ.
9. Mayo Clinic – kidney infection, symptoms and causes.
10. Drugs.com – risks of drinking baking soda.