Cranberry Extract
Cranberry Extract
Snapshot
Cranberry extract is a concentrated form of cranberries rich in proanthocyanidins that supports urinary tract health, antioxidant defense, and cardiovascular function.
What is Cranberry Extract?
Cranberry extract is derived from the fruit of the Vaccinium macrocarpon plant, concentrated to deliver high levels of bioactive compounds—particularly type A proanthocyanidins (PACs)—that inhibit bacteria adhesion and impart antioxidant effects.
Where It Comes From
Native to North America, cranberries are harvested in fall and processed into extract via water or alcohol extraction and drying methods to preserve the potent PACs and other phytonutrients.
Key Nutrients & Compounds
Cranberry extract contains proanthocyanidins (PACs), anthocyanins, flavonols (including quercetin and myricetin), ellagic acid, vitamin C, and fiber. The PACs are notably responsible for preventing bacterial adhesion to urinary tract walls.
Health Benefits
Cranberry extract helps maintain urinary tract health by preventing E. coli and other bacteria from binding to the bladder lining, reducing the risk of infections. Its antioxidant compounds protect cells from oxidative stress, supporting cardiovascular health by improving endothelial function and reducing LDL oxidation.
Recommended Dosage
Effective doses typically range from 300 mg to 1,500 mg of standardized cranberry extract daily, standardized to 8–36 mg of PACs. Split dosing—morning and evening—can help maintain steady PAC levels.
How to Use It
Cranberry extract is available in capsules, tablets, and liquid forms. It can be taken with water or added to juices and smoothies for easier consumption.
Who Should Use It?
Ideal for individuals prone to urinary tract infections (especially women), those seeking natural antioxidant support, or anyone looking to support cardiovascular wellness.
Possible Interactions or Cautions
High-dose cranberry may increase the risk of kidney stones in susceptible individuals due to oxalate content. It may also interact with blood-thinning medications (like warfarin), so consult a healthcare provider if you’re on anticoagulants.
Final Thoughts
Cranberry extract is a well-researched natural remedy for urinary tract protection and antioxidant support. When used correctly and consistently, it provides targeted defense against UTIs and promotes broader vascular and cellular health.
Scientific Studies
Howell, A. B., et al. (1998). Inhibition of P-fimbriated Escherichia coli adhesion by proanthocyanidin extracts from cranberries. Journal of Urology, 159(6), 1846–1851. https://doi.org/10.1016/S0022-5347(01)64091-0
Blumberg, J. B., et al. (2013). A review of the systematic reviews of the efficacy of cranberry in preventing urinary tract infections and its mechanisms of action. Nutrition Reviews, 71(9), 590–602. https://doi.org/10.1111/nure.12040
Rodgers, A. B., et al. (2009). Acute consumption of cranberry juice cocktail improves vascular function in patients with coronary artery disease. American Journal of Clinical Nutrition, 90(4), 764–768. https://doi.org/10.3945/ajcn.2009.27597