Dr. Wolff's V-San Lactic Acid Pessaries to maintain and restore vaginal pH levels.Using lactic acid to acidify the vaginal environment supports the growth of bacteria typically found in the vagina (lactic acid-producing lactobacilli = lactic acid bacteria), whilst having a negative effect on the growth of disease-causing germs. Dr. Wolff's V-San Lactic Acid can therefore be used to prevent vaginal infections in women prone to such conditions and as a supplement to drug therapy in vaginal infections.