The number of men dealing with low testosterone at some point in their life is close to half of the population. It is hard to get a completely accurate number, simply because not everyone gets tested and receives treatment for this issue.
As a man ages, they are more likely to deal with low testosterone levels. Warning signs that this may be an issue that is getting worse and worse include libido problems, erectile dysfunction, emotional issues, weight problems, and more. The sooner these issues are identified, the easier it is to fix everything and get back on track.