Testosterone is the hormone that puts hair on a man's chest and is the force behind his sex drive. It’s the hormone that builds a man physically – building muscles, strengthening bones and deepening the voice. It’s normal for men to experience a gradual decline in testosterone after age 30, but the symptoms of low testosterone can mirror those of other conditions, which is why it’s important for men to stay on top of their overall health. Whether to test your testosterone levels is a conversation you should have with your doctor, and Dr. Norm Shively, board certified urologist for Yakima Urology Associates, is here to tell you why.