Endovex This test measures the total of two forms of testosterone � free and bound. Normal test levels of combined bound and free testosterone range anywhere from 300-1100 ng/dl (nanograms per deciliter) depending on age and individual factors Endovex oncentration of testosterone much less than 300-1100 ng/dl is to be considered as low testosterone level. In this case testosterone deliver through the skin, by the use of a hormone containing patch, gel, or cream Endovex. Patch is applied daily to a man's shaved scrotum, the newer patch forms can be applied to the upper arms, back, thighs, or abdomen Endovex.