A large-scale, long-term double-blind study found that low testosterone levels were far, far lower than previously suspected, and showed that taking testosterone supplements didn't confer most of its reputed benefits -- no memory improvement and no physical vitality.
Testosterone does improve libido, though not as much as Viagra does, and does help with anemia and low bone-density. It also increases the risk of heart attacks in some men.
All told, the studies found that T did not improve men’s physical function or vitality. Nor did it help with age-related memory impairment. It did help with anemia and bone mineral density. It increased sexual desire and activity, but the effect was modest; men were better off using Cialis or Viagra. The most worrisome findings came from a study on cardiovascular risk: In men with certain risk factors, T accelerated coronary atherosclerosis, possibly increasing their chance of heart attack.
Assessing the studies in JAMA, endocrinologist David J. Handelsman underlined how little evidence there was to support popular claims of T’s powers. And yet, he observed, “rejuvenation fantasies thrive on hope without needing facts.”
The Testosterone Myth [Katrina Karkazis/Wired]
Scientists drilled into the Chixclub crater in the Gulf of Mexico to learn more about the end of the mesozoic era. They learned more than they expected, reports Katherine Kornei in The New York Times. The first day of the Cenozoic was peppered with cataclysms. When the asteroid struck, it temporarily carved a hole 60 […]
Get over it! Despite the mockers and complainers, and even attempts to make it illegal to perambulate while looking at your own damned phone, science concludes that the risks of it are negligible. As part of the mandated study, the DOT conducted an in-depth review of written crash narratives in the city between 2014 and […]
Typically, marine photography is done in rich, saturated color — the better to show off the riot of life beneath the waves. But the photographer Christian Vizl has done it in high-contrast black and white, producing eerily intense ways of re-seeing marine life. You can see the work on his site, and in his new […]
There’s reading for pleasure, and then there’s reading for fuel; absorbing the great ideas in nonfiction books so you can apply them in your own life. In today’s hectic pace, it can be difficult to find the time to do that reading – especially for the entrepreneurs and professionals who can benefit the most from […]
Breaking into the big leagues as a project manager isn’t done overnight, but there are principles that anyone can learn, and they’re applicable to nearly any business. No matter what your field, if there are multiple teams working toward a common goal, you’re going to need a roadmap. The Project Management Professional Certification Training Suite […]
On the one hand, nostalgia is “a corruption of the historical impulse,” according to William Gibson. On the other hand, “Super Mario Bros.” will never not be cool. Luckily, there’s a way to satisfy that retro gaming while still keeping an eye on the future: The GameShell Kit. This thing is simultaneously the last handheld […]