No. 16 is an aphrodisiac intended for women. A feminine blend of seductive, libido-awakening Muira Puama, hormone-balancing Tribulus and Maca, and heart-opening Rose. It is perfect for use in the hour before sex, to arouse and open, but this blend also generally tonifies the female reproductive system - increasing libido, supporting fertility, and balancing hormones over time - making it ideal for regular use.