Start by taking a good look in both the mirror and your closet to set yourself on the right path. We’ll get to the personal grooming in a minute, but as far as fashion goes, staying current is key.

Lab levels are 300-1000 nanograms per deciliter, so men in their twenties who are supposed to have a testosterone of 1,000 are placed in the same category as 80-year-old men with levels of 300 ...