DMAU works on the same hormone receptors as testosterone and progestin, contains only one steroid and has been tested in once-a-day formulations of capsules containing either powder or castor oil to be taken with food.
Page’s team used 100 volunteers in a month-long trial, some getting different dosages and some getting sugar or placebo pills. “Individuals on all doses had remarkably low testosterone levels,” according to Page.
DMAU is said to lower testosterone production by interrupting a signal from the brain to the testicles. Due to this lost signal, sperm are unable to finish their maturation and thus the possibility of fertilization is lowered.