Vaginal pH-lowering effect of locally applied vitamin C in subjects with high vaginal pH.

The primary objective of this randomized, double-blind, controlled study was the assessment of the pH-lowering effect of three different formulations of a vaginal device each containing 250 mg vitamin C. Overall, 39 women with vaginal pH >or=5, without evidence of vaginal infections, were randomly assigned to receive one of the three formulations for 6 days. The primary parameter assessed was vaginal pH, performed by the physician at the baseline and final visits and by the subjects each day during the application period; secondary parameters included the acceptability and safety profile of the tested devices.