Men and women age 40 or older could benefit from knowing their blood testosterone levels.  This healthy hormone is responsible for numerous health effects such as increasing muscle mass, bone health, and immune system function. 

Recent research signifies that low levels of testosterone may increase your risk of death from fatal heart attacks.  These unhealthy levels create a type of turmoil within the body as organ systems suffer and the body becomes diseased.

Such studies might provide "insights and better understanding of disease mechanisms, such as how and why testosterone might be related to poorer health through, for example, insulin metabolism, lipid metabolism or inflammation," she said.

More research is needed but, in the meantime, you would be well advised to adopt an intense exercise routine (after obtaining a doctor's approval) to naturally boost testosterone in your body.