Effect of cranberry juice on urinary pH

Area of Science:

• Nutrition Science
• Urology

Background:

• Urinary pH is a critical factor influencing urinary tract health and the efficacy of certain medications.
• Dietary interventions, such as cranberry juice consumption, are explored for their potential to modulate urinary parameters.

Purpose of the Study:

• To investigate the effect of varying daily cranberry juice intake on urinary pH.
• To assess the feasibility and potential side effects of a controlled cranberry juice intervention.

Main Methods:

• A randomized controlled trial with a before-and-after design was conducted over 12 days.
• Forty healthy subjects (21 female, 19 male) were divided into four groups, ingesting 150, 180, 210, or 240 mL of cranberry juice with meals.
• Diet was standardized, and subjects self-monitored urinary pH using nitrazine tape.

Main Results:

• A statistically significant difference (p < .01) in mean urinary pH was observed between control periods and cranberry juice intervention periods for all groups.
• No significant adverse effects such as increased bowel movements, weight gain, or frequent urination were reported.
• Urinary pH measurement accuracy by subjects was not compromised.

Conclusions:

• Cranberry juice consumption demonstrably alters urinary pH in a dose-dependent manner.
• The intervention was well-tolerated, with no significant adverse events.
• Cranberry juice represents a viable dietary option for modulating urinary pH.