I read that men experience degraded fitness under testosterone deficiency. There are ways to support it in norm. But what about the woman. How can they stay so vivid at much lower testosterone levels? Do they have different (muscle/brain) tissue responsiveness to the testosterone?
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I'd like to clarify a very important point: both men and women have testosterone and estrogen, however the proportions and functions are different in each. An article on whether "BioSignature" holds water against science had some interesting facts regarding the role of testosterone and estrogen in men and women:
The hormonal profile between men and women are different, and the effect they have on the body is profound.
NOTE: women also have skeletal differences that do affect the weight they can handle, and what constitutes proper form.
There are some similarities as well:
Bottom line is this: both men and women's physiologies are fundamentally different. Women simply don't need the same amount of testosterone as men to function properly from a physiological standpoint. They aren't going to develop the same moodiness, lack of sleep, depression, and other ailments common with low testosterone in men. Also note that all a "natural testosterone booster" can do is bring low testosterone closer to normal levels.