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Do Cranberries Prevent Urinary Tract Infections?. Sarah Gunnell, MS, CNSD, CSP, RD,CD. Background. Urinary tract infection Presence of bacteria in the urine Cranberries 90% water Quinic acid, malic acid, and citric acid as well as glucose and fructose
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Do Cranberries Prevent Urinary Tract Infections? Sarah Gunnell, MS, CNSD, CSP, RD,CD
Background • Urinary tract infection • Presence of bacteria in the urine • Cranberries • 90% water • Quinic acid, malic acid, and citric acid as well as glucose and fructose • Prevent bacteria from adhering to the uroepithelial cells of the bladder wall
Cochrane Review Results • Five cross-over and five parallel group studies • Cranberry juice versus placebo • Cranberry tablets versus placebo • Cranberry products significantly reduced UTI at 12 months compared to placebo and control • More effective in women with recurrent infections
Limitations • High dropout rate • Optimum dose not clear • Method of delivery not clear • Six studies not included in meta-analysis
Conclusions • Evidence is limited • Adherence is questionable • Population specific • Dosage, duration, and administration method not clear