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."
If a young man's low testosterone is a problem for a couple trying to get pregnant , gonadotropin injections may be an option in some cases. These are hormones that signal the body to produce more testosterone. This may increase the sperm count. Hedges also describes implantable testosterone pellets, a relatively new form of treatment in which several pellets are placed under the skin of the buttocks, where they release testosterone over the course of about three to four months. Injections and nasal gels may be other options for some men.
There are huge numbers of testosterone creams, pills, and injections as well as ads convincing men they are in need of these products. There are also thousands of lawsuits filed against the manufacturers of the various testosterone therapies claiming the drugs caused several severe cardiovascular side effects including heart attack and stroke. With this knowledge, Men’s Journal published an article describing natural ways men can boost their testosterone through diet so as not to take on unnecessary risks. One suggestion made was to increase vitamin D intake which could increase testosterone level. Men should always use caution and discuss diet changes with their doctor.