It's an actual test lab work:
Hormone levels can be evaluated for symptoms of PMS, sleep disorders, menopause, andropause, sex hormone and imbalance. It allows you to know where you stand compared to averages for your age. Testing your hormone levels is a mandatory step in getting your hormone levels rebalanced. If you do not know what your progesterone and estrogen, testosterone levels are then you cannot know what the best replacement therapy is for you.
The doctor than tailors the prescription towards your needs. It's a "new term" longevity clinincs use. But, the prescription is suppose to be identical to what's in your body. I don't if a compund pharmacy does it or what all I know is I called one doctor and they wanted $7000 to run the test.