So, how does one ensure that testosterone levels remain in balance? Some doctors suggest that monitoring testosterone levels every five years, starting at age 35, is a reasonable strategy to follow. If the testosterone level falls too low or if the individual has the signs and symptoms of low testosterone levels described above, testosterone therapy can be considered. However, once testosterone therapy is initiated, testosterone levels should be closely monitored to make sure that the testosterone level does not become too high, as this may cause stress on the individual, and high testosterone levels may result in some of the negative problems (described previously) seen.
But I'm not more aggressive—a behavior change often tied to testosterone. That's not surprising to Robert Sapolsky, ., a neuroendocrinologist at Stanford University and a leading researcher on stress and behavior. "It's really not the case that testosterone 'causes' aggressive behavior," he says. "Instead, it makes the brain more sensitive to social cues that trigger aggression. And in support of that, a guy's testosterone level isn't a very good predictor of how likely he is to be aggressive."
Furthermore, check your chemical exposure. Low testosterone doesn't necessarily result in a receding hairline, but it carries with it significant life-changing symptoms that may or may not be a result of exposure to phytoestrogens. Phytoestrogens are estrogen-like compounds found in a wide range of plants and foods from herbs and grains to fruits and vegetables, which is where most guys ingest these "metabolic disruptors," according to Pescatore. These compounds can slow down or alter the endocrine system , which controls your secretion of hormones. That, in turn, can affect libido, metabolism, growth, and development.