CHARLESTON, S.C.--(BUSINESS WIRE)--Zestra Laboratories said today that it has completed a large-scale clinical study examining the potential of its widely available, non-hormonal, non-prescription Zestra® Feminine Arousal Fluid for improving the sexual experiences of women. This is the second placebo-controlled clinical study of Zestra®, and takes an unprecedented look at the many factors influencing women’s sexual satisfaction. The study was designed to further determine Zestra’s safety and effectiveness among a diverse group of women.