July 16, 2016 · 0 Comments
Testosterone replacement therapy may not be the fountain of youth for aging men. A large government-funded study published in the New England Journal of Medicine in February reports that testosterone, touted for its ability to jump-start libido, did little to improve a man’s abilities in the bedroom.
“The trial showed modest benefits in sexual activity and functions,” says study researcher Shalender Bhasin, MD, of Brigham and Women’s Hospital in Boston. But those sexual benefits may not last, the year-long study concluded. By the end, they had begun to taper off. “And improvements in other areas were less clear,” Bhasin says.
Terry Waters, a former college wrestler and baseball player, loved working out. He got real pleasure out of pushing himself hard at the gym, and he liked the feeling of tired but virtuous afterwards. He figured regular physical activity and its health benefits would always be a part of his life. Then came marriage, three kids, a demanding job as a software engineer in Boston — and a thousand and one excuses not to make it to the gym. “For a little while, you convince yourself you’re still in pretty…
Men with “low T” — testosterone below 275 nanograms per deciliter of blood — commonly feel down or depressed, and the study showed that testosterone therapy did give a slight lift to their mood. But it had little impact on their energy or levels of physical activity.
These results arrive at a time when the number of men undergoing testosterone therapy is on the rise. Between 2009 and 2013, prescriptions nearly doubled, from 1.3 million to 2.3 million. The FDA has approved it to treat medical conditions that affect testosterone production, such as diseases of the testes, the pituitary gland, and the hypothalamus.
But doctors write 4 in 5 testosterone prescriptions for men ages 40 to 74, though the FDA has not approved its use to offset the gradual decline in testosterone that happens with age.
According to the FDA, symptoms commonly associated with low T may have other causes. And the pros and cons for aging men have not been established.
Bhasin and his colleagues’ study looked at the effectiveness of testosterone replacement. Yet it was not large enough or long enough to settle the question of safety. “With the widespread use of testosterone, the issue of safety has become even more important, but we don’t know the long-term risks of testosterone therapy,” Bhasin explains.
For instance, studies of testosterone’s impact on heart health have had conflicting results. Some research suggests it does harm; other research says the opposite. Concerns about the risk of prostate cancer in men who take testosterone over many years also remain unclear.