This will depend on which product you are prescribed:
The main active ingredient in the PMS product is Progesterone. Testosterone is sourced from yam.
The main active ingredient in the Low Libido product is Testosterone. Estriol is sourced from soy.
The main active ingredients in the Low Libido product (for those aged 38+) is Testosterone, Progesterone and Estriol. Progesterone can be sourced from soy or yam.
Other ingredients include:
Base cream ingredients
All hormones are identical in structure to those produced by the body and are given at doses intended to just increase serum concentrations to approximate physiological levels