Trestolone or 7 alpha-methyl-19-nortestosterone (MENT) is a synthetic androgen that is ten times as potent as testosterone. MENT is not 5-alpha reduced to DHT. It inhibits gonadotrophin release, suppresses testosterone and sperm production. Yet, MENT provides adequate replacement therapy for most androgen-dependant functions. MENT has a faster metabolic clearance rate than testosterone and, in contrast to testosterone, MENT does not bind to sex hormone binding globulin (SHBG). MENT remains capable of aromatisation (to 7-alpha-methyl-estradiol) preserving the benefits oestrogen imparts on male physiology.