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If your wee-wee's going E, have some cranberry. Does cranberry juice actually help to prevent or treat UTIs? Or is that just some old wives tale? Welcome back to What the Science Home Remedy Edition. Let me know in the comments which remedy to tackle next. UTIs are about 50 times as common in adult women as in men, possibly due to having a shorter urethra that's closer to the anus. And while they are pretty easy to treat with antibiotics, for some people that ends up turning into a game of whack-a-mo, where it just keeps coming back. And the problem with antibiotics is that the problem with antibiotics is that that overuse can lead to some pretty scary antibiotic resistance. So I set out to research if Grandma's cobbler could actually help. First up, the mechanism. Is there a plausible explanation for why cranberries would help versus the bacterial infection? The answer is yes. Multiple studies have shown that there are some compounds in cranberries that actually help stop bacteria from sticking to the walls of the urethra or the bladder. But wait, there's more. Speaking of antibiotic resistance, researchers from Montreal found that cranberry extract actually makes bacteria more sensitive to antibiotics, both by making the bacterial cell wall more permeable and by interfering with the bacteria's ability to get rid of the antibiotic once it's in the cell. The studies lead author stated, When we simultaneously treat the bacteria with antibiotic and a cranberry extract, no resistance developed. And I bet the savvy among you are already thinking, all this lab stuff is great, but what about actual outcome data in humans? I got you, my fellow science seekers. Last time I researched this a couple of years ago, I was pretty disappointed. A 2012 meta-analysis of 24 studies concluded that, compared with placebo, water, or no treatment, products did not significantly reduce the occurrence of symptomatic UTI overall. But a lot of these studies were not very well done, giving us very wide confidence intervals. And say it with me, absence of evidence is not evidence of absence. And science moves on. That 2012 review was updated to include 26 more studies for a total of 50, with almost 9,000 participants. And the results were pretty exciting. Overall, taking cranberry products either in juice or pill form reduced the total risk But let's break it down by group. In women with recurring UTIs, it reduced risk by 26%. In children by 54%, and in those with increased UTI risk due to some sort of medical intervention, it lowered risk by 53%. But it didn't seem to help the elderly institutionalized folks, pregnant women, or those with bladder emptying problems. And in the few studies that compare the two, Cranberry did way better than probiotics. Final verdict? If UTIs are an issue for you, you can can the cran-crans from Grand Grand. Thank you.

Additional notes

Can cranberry extracts and juice help treat urinary tract infections? This has been an old wive's remedy for years, but the science has always been a bit hit or miss. One of the big challenges is that a lot of the studies that I've tried to look at this use inconsistent extracts, formulations, dosages, etc– always a big problem when it comes to natural compounds rather than pharmaceuticals, which are individual molecules. Nerdy explanation: Cranberry metabolites, particularly A-type PACs, flavonoids, and phenolic acids, inhibit Escherichia coli adhesion to urothelial cells, reducing UTI recurrence. Gut microbiota-driven transformation of PACs into bioactive metabolites enhances their efficacy, while cranberry oligosaccharides disrupt biofilm formation in high-risk populations. Hi! If you’re new here, I’m Avisha, a scientist who helps you walk that line between cutting-edge science that can be applied to improve your life and health and... misinformation. Don’t trust me, trust my sources: STUDIES & LINKS CITED IN THIS VIDEO 2025 Review: DOI 10.3389/fnut.2025.1502720 (not directly referenced but confirms results) 2023 Cochrane Meta Analysis – doi: 10.1002/14651858.CD001321.pub6/full 2012 Cochrane Meta Analysis - doi: 10.1002/14651858.CD001321.pub5/full An examination of the anti-adherence activity of cranberry juice on urinary and nonurinary bacterial isolates – PMID: 3063927 A-type cranberry proanthocyanidins and uropathogenic bacterial anti-adhesion activity – DOI: 10.1016/j.phytochem.2005.05.022 #sciencefacts #science #learnontiktok #tiktoklearningcampaign #nutrition

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