Continuing coverage: At 56, David Cordova was facing osteoporosis. To reverse that, his doctor put him on testosterone shots. But first, he had a blood test to check his testosterone level. That's not always the case. “We see a substantial percentage of younger men, men in their 40s, who begin testosterone therapy without even really knowing if they need it," said Dr. Jacques Baillargeon, who conducted the UTMB testosterone study. News of the study continues to receive widespread attention and appeared on KUHF-FM (NPR 88.7) and in the Austin American-Statesman.