The BEST and fastest way to lower your testosterone levels:
ALCOHOL, bar none.
Drink 3-5 beers or shots(Vodka has low calories) every day until the test. Also, make sure someone drives you to get the blood work done.
Try to get as little sleep as possible.
With this combination, you will have very low test levels whithin days.
I'm being serious.
Funny how a lot of people at the gym do the same thing every weekend, and wonder why they don't grow