Cranberry Guide

Cranberry is a fruit used in natural health products to help prevent recurrent urinary tract infections and provide antioxidant support. Learn about its uses, supplement forms, and what to look for when choosing a product.¹

✅ Reviewed by Jamieson's Science Team

Quick Answers

What are cranberry supplements used for?

Health Canada recognizes cranberry for helping prevent recurrent urinary tract infections and providing antioxidant support.¹

Does cranberry treat a UTI?

Cranberry supplements are used to help prevent recurrent UTIs. If you have UTI symptoms, speak with a healthcare practitioner rather than relying on cranberry to treat an infection.¹

How long does cranberry take to work?

For recurrent UTI prevention, Health Canada recommends using cranberry for at least four weeks to see beneficial effects.¹

Can cranberry interact with medications?

Yes. Health Canada recommends speaking with a healthcare practitioner before use if you take blood thinners.¹

What is cranberry?

Cranberry, or Vaccinium macrocarpon, is a fruit used in food and natural health products. 

Supplemental forms include dried fruit, powders, extracts, juices, and concentrated juices. Health Canada recognizes cranberry for urinary tract and antioxidant support.¹

How is cranberry used for urinary tract health?

Health Canada recognizes cranberry for helping prevent recurrent urinary tract infections, including in women.¹ 

Cranberry is also a source of antioxidants, which help protect cells from oxidative damage caused by free radicals.¹ 

It’s important to distinguish prevention from treatment: cranberry supplements aren’t a substitute for medical care if UTI symptoms develop. 

Which health goals can cranberry support?

Women’s Health

Cranberry can help prevent recurrent urinary tract infections, including in women.¹

Everyday Wellness

Cranberry provides antioxidants that help protect cells against oxidative damage caused by free radicals.¹

Urinary Tract Health

Cranberry supplements can help support urinary tract health by helping prevent recurrent UTIs.¹

How can cranberry fit into your routine?

Cranberry is often used as part of a routine focused on urinary tract health. 

  • For recurring concerns: Cranberry may help prevent recurrent urinary tract infections.¹ 
  • Use consistently: Health Canada recommends at least four weeks to assess this benefit.¹ 
  • Stay hydrated: Regular fluid intake is still an important everyday habit. 
  • Know when to seek care: Cranberry is for prevention, not a substitute for treating an active UTI.¹ 

*It is important to consult your trusted healthcare practitioner before adding any new natural health supplement to your routine. 

What should you look for in a cranberry supplement?

Start with what you need, then choose a product that fits your life.

Check the amount: Compare the cranberry extract and equivalent fruit amount. 

  • Review the concentration: Extract ratios can differ significantly between products. 
  • Check added ingredients: Some formulas also contain D-mannose or vitamin C. 
  • Choose your format: Jamieson offers cranberry capsules and gummies. 
  • Read the cautions: Speak with a healthcare practitioner if you have a history of kidney stones or take blood thinners.¹ 
  • Look for an NPN: Licensed natural health products in Canada carry an eight-digit NPN.² 
  • Look for quality: Jamieson products are backed by the Jamieson 360 Quality Promise. 

For more than 100 years, Jamieson has combined scientific expertise with rigorous quality testing. Every product is backed by the Jamieson 360 Quality Promise. 

*It is important to consult your trusted healthcare practitioner before adding any new natural health supplement to your routine. 

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FAQs
Sources

1. Health Canada. Cranberry — Vaccinium macrocarpon Monograph. Natural and Non-prescription Health Products Directorate. Updated March 27, 2026.[Text Wrapping Break]https://webprod.hc-sc.gc.ca/nhpid-bdipsn/dbImages/mono_cranberry_english.pdf 

2. Health Canada. About Natural Health Products.[Text Wrapping Break]https://www.canada.ca/en/health-canada/services/drugs-health-products/natural-non-prescription/regulation/about-products.html