Does cranberry juice help a UTI? What you should know

The constant need to pee, a burning sensation when you do make it to the toilet, and pelvic cramping and pain are all symptoms associated with urinary tract infections (UTIs). So it’s not surprising that we’re all looking for a quick way to relieve the discomfort.

Drinking cranberry juice has long been hailed as an at-home remedy for UTIs. But does a glass of cranberry juice really help UTIs? Or is it a myth? And if not, how and why does cranberry juice help a UTI? 

Below, a urologist explains exactly what UTIs are, the symptoms associated with them, and why cranberry juice has been linked to UTIs. 

It’s important to note that if you start to experience any of the symptoms associated with UTIs, you should speak to your health care provider rather than trying to treat it yourself. It’s crucial to get the care you need. 

What is a UTI?

When you hear the term UTI, you might automatically think of a bladder infection (also known as cystitis). However, UTI is just a term used to describe a range of different infections anywhere in your urinary tract. And they’re very common.

If you’ve ever had a UTI, you’re not alone. Research has highlighted that they’re one of the most frequent clinical bacterial infections women face, with 50% to 60% of us experiencing one in our lifetime. In fact, it’s estimated that around 20% to 30% of young women have recurrent UTIs (this is when you experience two or more UTIs within a six-month period or three within a year). 

Dr. Tolulope Bakare, MD, urologist and Flo medical board member, says, “A UTI is just an infection of the urinary system, anywhere from the bladder to the tubes connecting the kidneys, which are called the ureter, to the kidney itself — and even in the little tracts that empty the bladder, called the urethra.”

A UTI usually occurs when bacteria gets into the urinary tract (usually from the bowels) and causes an infection. In some cases, it can be caused by fungi or, in rare cases, viruses. But Dr. Bakare explains that they’re much more common in women and people with vaginas because we have a much shorter urethra — making it easier for bacteria to get into (and infect) our urinary tract. 

Essentially, anything that stops you from being able to empty your bladder fully or flush out bacteria, or that irritates the urinary tract, can cause a UTI.

Does cranberry juice help UTIs? What causes UTIs?

Common causes of a UTI can include:  

• Having sex
• Conditions that block the urinary tract, such as  kidney stones
• Anything that makes it difficult to fully empty the bladder, such as constipation
• Urinary catheters 
• Not drinking enough fluids
• Not keeping the genital area clean and dry

It’s true that some people are more prone to UTIs than others. You’re more likely to experience a urinary tract infection:

• If you’ve had one before
• If you’re pregnant or postmenopausal. This is because your hormones change dramatically at this time, which can affect the growth of bacteria.
• If you have a health condition like diabetes that makes you more prone to UTIs
• If you have a weakened immune system or are undergoing chemotherapy. This can put you at a higher risk of picking up a UTI.

Does cranberry juice help UTIs? UTI symptoms in women

Before we deep dive into the science behind cranberry juice and urinary tract infections, let’s look at the symptoms of a UTI. First up, it’s important to note that as your urinary tract is such a large area, you may experience different symptoms depending on where the UTI is. 

In lower tract UTIs (which affect your bladder and urethra), you might experience:

• An urgent need to pee
• An inability to pee more than a few drops, even if it feels like you need to
• Burning or pain in the urethra
• Soreness or cramps in your back, sides, or abdomen
• Cloudy or bloody urine
• Remember that although these symptoms are painful and unpleasant, the majority of lower tract UTIs are really easy to treat.
• Upper tract UTIs, like those in the kidneys, can be more severe. You might experience: 
• Fever
• Back pain
• Nausea
• Chills
• Vomiting

While a lower tract UTI may clear up on its own, a kidney infection or upper tract UTI can be more serious, so it’s worth getting checked out if you have any of the above symptoms or are worried.

How do doctors test for a UTI? They’ll ask you to provide a fresh urine sample and then check it for red blood cells, white blood cells, and any bacteria or signs of infection. 

Does cranberry juice help UTIs? How and why does cranberry juice help UTIs?

But the big question remains — does cranberry juice actually treat UTIs? Well, that seems to be more myth than science. 

“The main reason why cranberry has the reputation it has is because of a compound in it called proanthocyanidin,” Dr. Bakare says. “This can help in preventing UTIs, but not treating them.” 

You may have not heard of proanthocyanidins, but they’re known for their health benefits — and you can find them in foods like cranberries, grapes, blueberries, and blackberries.

So a compound in cranberries can help prevent UTIs — but hold on before you reach for the bottle. “For you to get the amount of the compound to actually have an effect, you would have to drink an excessive amount of cranberry juice,” Dr. Bakare explains. Now some companies are putting that compound into a pill instead, to give you a higher concentration. 

In fact, a study in the American Journal of Obstetrics and Gynecology found that in a randomized group of patients, those given cranberry juice capsules had a “significantly lower” incidence of UTIs post-surgery.

While these pills can be effective in helping to prevent UTIs, they are probably not enough to prevent infection on their own. “You want to make sure you’re still doing the things like hydrating properly and making sure you’re emptying your bladder on a frequent basis,” Dr. Bakare says.

How to treat a UTI

So if cranberries aren’t the answer, how do you get rid of a UTI? 

If you speak to a health care professional and they diagnose you with a UTI, they’re likely to prescribe you a course of antibiotics. This should stop the infection from spreading by stopping the bacteria from growing and multiplying. If the infection is slowed or stopped, it lets your immune system clear the infection.

If you’re pregnant, it’s good to remember that not all antibiotics might be suitable. Pregnant people are often told to avoid nitrofurantoin and trimethoprim-sulfamethoxazole during the first trimester, so make sure to always speak to a medical professional before starting medication to make sure it’s the right choice for you. 

If you’re postmenopausal and have recurrent UTIs, Dr. Bakare has some advice: “One of the treatments to prevent recurring UTIs is to estrogenize their vagina again, by giving them estrogen cream.”

Heating pads can help with any cramping and discomfort — and you may want to stay away from certain drinks. Coffee, alcohol, and sodas with citrus juice can all irritate the bladder.

Does cranberry juice help UTIs? The takeaway

So the good news is that although UTIs are common, they are normally very easy to treat with a short course of antibiotics. 

But that cranberry juice you’ve been drinking probably isn’t helping you clear it. If you’d like to prevent UTIs, then cranberry pills can help — but make sure you’re clearing your bladder regularly and, of course, you’re staying hydrated. Good advice for UTIs and, let’s be honest, for life in general.