testosterone

My colleagues Erik Lief and Chuck Dinerstein have each weighed in with companion pieces, which you'll find below, about a highly controversial rule by the International Association of Athletics Federations (I.A.A.F.), which governs international track and field competition. 

South African Caster Semenya, a two-time Olympic champion in the 800 meters has unusually high levels of testosterone for a woman. While this no doubt plays some part in her success Semenya is not accused of doping; her body just makes more testosterone (1), which I.A.A.F. claims gives her an unfair advantage. So much so that they have established another classification female athletes called "differences of sexual development" (DSDs). The I.A.A.F established a maximum concentration of 5...

Testosterone!A new report in the current New England Journal of Medicine addresses a topic that has long aroused controversy in primary care, internal medicine, and geriatrics: Does supplementing testosterone in older men with low testosterone levels add to quality of life and functional enhancement?

The study, entitled "Effects of Testosterone Treatment in Older Men," was done by a multi-center group, The Testosterone Trial Investigators, led by Peter J. Snyder, MD, of the Perelman School of Medicine at the University of Pennsylvania...

Heart testing

The ads are all over TV men suffering from low T or low testosterone can boost their levels and improve a variety of macho attributes by using one of several types of testosterone supplements. But according to the FDA, this may not be such a great idea.

Testosterone (T) is the hormone produced by the testes after puberty that is responsible for male sexual characteristics such as increased muscle mass, body hair, and of course, libido. There are some genetic anomalies and medical conditions that result in subnormal levels...

FDA Stamp of ApprovalThe Federal Food & Drug Administration (FDA) yesterday issued a mandate warning drug companies marketing testosterone supplements, via pills, gels or other methods, to change the label or indications for approved use. This change will now require specific disease indications for approved treatment, whereas doctors have been increasingly using the male hormone to attempt to improve general health, in the guise of a disease-construct called Low-T, including symptoms more consistent with aging: lethargy, diminished energy, low libido, depression.

However, as noted in the FDA advisory committee...

The latest in health news: Sure, as men age, testosterone levels decline, but is this something that should be fixed? Why CT lung cancer screenings save lives, and prominent news organizations recognize our late founder and president Dr. Elizabeth Whelan's lifelong achievements in the fight for sound science.

ic_1310076605_826x285_trueAccording to information in a recent study, the data on the effects of testosterone injections on men s cardiovascular health have been mixed, with some reports finding an increased risk of heart attack (MI) and stroke, and others not doing so. In order to resolve some of these conflicting results, Dr.Jacques Baillargeon and colleagues at the University of Texas Medical...

Screen Shot 2014-01-10 at 2.30.15 PMPerhaps there isn t a better alternative for men living with low testosterone levels after all. Hormone treatments that boost T levels may increase the risk of heart attacks, a new study finds.

The study, published in PLoS ONE, tracked more than 56,000...

too much T?Sales of testosterone supplements have skyrocketed by over 5-fold over the past decade, with 5.3 million prescriptions written in 2011. While it s true that, for men with signs and symptoms of low testosterone (T), therapeutic replacement may have beneficial effects on sexual function, bone mineral content, lipid levels and body fat,...

176522797Falling levels of testosterone are often blamed for some of the changes middle-aged men may see, such as larger waistlines, smaller muscles and decreased sex-drive. However, a new study published in the New England Journal of Medicine suggests that estrogen may also play a part. In younger women, most estrogen is produced in the ovaries. But in both men and women as they age, testosterone becomes a relatively key source of estrogen, which is...