Cranberry
Cranberry is a tart red berry native to North America, rich in polyphenols and vitamin C. It is commonly consumed fresh, dried, or as juice, with the most studied potential benefit related to urinary tract health.
Also known as: Vaccinium macrocarpon, American cranberry, Cranberry juice, Cranberry extract
Scientific & Editorial Standard: This information is synthesized from peer-reviewed databases (such as PubMed, NIH, NHS, and Mayo Clinic) and validated using multi-model cross-referencing by the Plateify Editorial Team. It is intended for educational purposes and is not medical advice. If you suspect food sensitivities, consult a healthcare provider.
Cranberries are small, acidic red berries that grow on low-lying vines in boggy, acidic soils across North America. They are harvested in autumn and consumed fresh, frozen, dried, or processed into juice, sauce, and dietary supplements. Cranberry products are popular in North American cuisine and widely available year-round in dried and juice forms.
Cranberries are low in calories (approximately 46 per 100 g fresh) and notable for their polyphenol content, particularly proanthocyanidins (PACs) and anthocyanins. They contain vitamin C, dietary fiber, and manganese. The acidity and specific polyphenol profile are the biochemically active components. Dried cranberries and cranberry juices — especially sweetened blends — are calorie- and sugar-dense, which may be relevant for those managing blood sugar. Cranberries contain small amounts of sorbitol and fructose; individuals with fructose malabsorption or irritable bowel syndrome should be mindful of portion size.
Urinary Tract Health
Cranberry contains A-type proanthocyanidins that may inhibit bacterial adhesion to uroepithelial cells, primarily in prevention of recurrent urinary tract infections in susceptible populations. Meta-analyses of clinical trials show modest, inconsistent benefit for prevention in women with recurrent UTIs; efficacy is clearer in prevention than treatment of active infection. Juice, powder, and whole fruit show similar bioactive profiles, though sweetened juice products contribute significantly more sugar than the whole fruit.
Tolerance and Intake Guidance
Cranberries and cranberry products are well tolerated by most people. Fresh or frozen cranberries present no special concerns at typical consumption levels. Dried cranberries and juice are calorie- and sugar-dense; a 1-ounce serving of dried cranberries contains approximately 19–25 g sugars depending on added sweeteners. 100% unsweetened cranberry juice still contains a meaningful amount of natural sugar, while cranberry cocktails and juice blends are typically much higher in sugar. Those with kidney stones, on anticoagulant therapy (warfarin), or with fructose malabsorption should consult a healthcare provider before using cranberry products regularly. Cranberry is not associated with common food allergens, though individual sensitivity is possible.
Frequently Asked Questions
Does cranberry juice prevent urinary tract infections?
Cranberry contains compounds that may reduce bacterial adhesion to urinary tract cells. Research shows modest benefit for preventing recurrent UTIs in women with a history of infection, though evidence is inconsistent. Cranberry is not effective as a treatment for active UTI and should not replace antibiotics when prescribed.
How much sugar is in cranberry juice and dried cranberries?
Sugar content varies considerably by product. Even 100% unsweetened cranberry juice contains a meaningful amount of natural sugar, and cranberry cocktails and juice blends are typically much higher. Dried cranberries are highly concentrated, with roughly 19–25 g sugar per 1-ounce serving depending on added sweeteners. Those managing blood sugar should check labels and account for this when including cranberry products in their diet.
Are there risks with taking cranberry supplements long-term?
Cranberry is generally safe for long-term use in food amounts. However, high-dose extracts may increase kidney stone risk in susceptible individuals and may interact with warfarin (a blood-thinning medication). Anyone on anticoagulants or with a history of kidney stones should consult a healthcare provider before using cranberry supplements regularly.
Sources
- Cranberry — Health Information — National Center for Complementary and Integrative Health (NCCIH)
- Cranberries for preventing urinary tract infections — PubMed Central
- Nutrition Data: Cranberries, raw — USDA FoodData Central
- The Nutrition Source: Cranberries — Harvard T.H. Chan School of Public Health
Educational content: This page is for general informational purposes only. Individual responses to foods vary widely. If you suspect a food allergy or sensitivity, consult a licensed dietitian, allergist, or physician before making dietary changes. Full disclaimer
Some content on this site is AI-assisted. While we strive for accuracy, information may not reflect the latest research. Always verify health information with a professional.
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