Category Archives: Testosterone Information

Reading Time: 2 minutesWashington, Feb 1 (ANI): Researchers have found that low testosterone levels occur five times more often among men who take long-acting instead of short-acting opioids for chronic pain. While it has been known that opioids cause low testosterone in men, this study is the first to show a significant difference in risk between short-acting (immediate release) and long-acting opioids. The 81 men in the retrospective study were between 26 and 79 years old (median age 51) and were seen in the chronic-pain clinic at Kaiser Permanente's Santa Rosa Medical Center (Calif.) between January 2009 and June 2010. All of the … Read more »

Reading Time: 2 minutesA testosterone test checks the level of this male hormone (androgen) in the blood. Testosterone affects sexual features and development. In men, it is made in large amounts by the testicles . In both men and women, testosterone is made in small amounts by the adrenal glands , and in women, by the ovaries . The pituitary gland controls the level of testosterone in the body. When the testosterone level is low, the pituitary gland releases a hormone called luteinizing hormone (LH). This hormone tells the testicles to make more testosterone. Before puberty, the testosterone level in boys is normally … Read more »

Reading Time: 2 minutesScienceDaily (May 10, 2012) By comparing the testosterone levels of five-month old pairs of twins, both identical and non-identical, University of Montreal researchers were able to establish that testosterone levels in infancy are not inherited genetically but rather determined by environmental factors. "Testosterone is a key hormone for the development of male reproductive organs, and it is also associated with behavioural traits, such as sexual behaviour and aggression," said lead author Dr. Richard E. Tremblay of the university's Research Unit on Children's Psychosocial Maladjustment. "Our study is the largest to be undertaken with newborns, and our results contrast with the … Read more »

Reading Time: 2 minutesApr. 3, 2013 Low testosterone levels may herald the subsequent development of rheumatoid arthritis in men, suggests research published online in the Annals of the Rheumatic Diseases. Sex hormones are thought to play a part in the development of rheumatoid arthritis, and both men and women with the condition tend to have lower levels of testosterone in their blood than healthy people. But it is not clear whether this is a contributory factor or a consequence of the disease. The researchers based their findings on participants of the Swedish Malmo Preventive Medicine Program (MPMP), which began in 1974 and tracked … Read more »

Reading Time: 2 minutesPublic release date: 20-Jul-2012 [ | E-mail | Share ] Contact: Andrew Gould andrew.gould@pcmd.ac.uk 44-188-438-346 The Peninsula College of Medicine and Dentistry A research study led by the Peninsula College of Medicine and Dentistry, University of Exeter, and Boston University School of Medicine, in collaboration with a global consortium, has identified genetic markers that influence a protein involved in regulating oestrogen and testosterone levels in the bloodstream. The results, published online in PLoS Genetics, also reveal that some of the genetic markers for this protein are near genes related to liver function, metabolism and type 2 diabetes, demonstrating an important … Read more »

Reading Time: 2 minutesTUESDAY, May 28 (HealthDay News) -- After winning a team competition against strangers or rivals, men's testosterone levels increase. But when they're victorious against friends, their testosterone levels remain the same, according to a new study. This response during group competition is rooted in evolution and related to how humans form coalitions or alliances in warfare, the researchers said. "One interesting thing about humans is that we are the only animal that competes in teams," Mark Flinn, a professor of anthropology at the University of Missouri, said in a university news release. "Our hormonal reactions while competing are part of … Read more »

Reading Time: 2 minutesLondon, May 9 : Taking testosterone supplements may help older obese men in cutting their excess weight, researchers have suggested. In a study, hormone-deficient men were given testosterone supplements in a similar way to HRT for older women. Men lost an average of 16kg over five years when testosterone levels were increased back to normal. But experts warn that supplements may not be the answer due to possible risks of prostate cancer and heart disease, the BBC reported. "The notion that this is a quick fix for obese older men is, as always, simplistic. It is far more sensible and … Read more »

Reading Time: 2 minutesSep. 30, 2013 Boosting testosterone can promote generosity, but only when there is no threat of competition, according to new research published in Psychological Science, a journal of the Association for Psychological Science. The findings show that testosterone is implicated in behaviors that help to foster and maintain social relationships, indicating that its effects are more nuanced than previously thought. "Testosterone may mediate competitive and potentially antisocial behavior when social challenges or threats need to be confronted and handled," explains lead researcher Maarten Boksem of Rotterdam School of Management, Erasmus University (RSM) in the Netherlands. "But it can also induce … Read more »

Reading Time: < 1 minuteTestosterone thought to cause 'man flu' Men have a reputation for being sooks when it comes to winter colds and flu but researchers believe "man flu" really does exist and the culprit is testosterone. US and French scientists have found evidence that testosterone plays a key role in making men's immune responses more sluggish than women's. It has long been thought that women's immune systems are generally stronger and respond more quickly to infections and vaccinations than that of males, but the cause has been unknown. The new study blames testosterone for dampening the immune response, suggesting men with high … Read more »

Reading Time: < 1 minuteDUBLIN--(BUSINESS WIRE)-- Research and Markets (http://www.researchandmarkets.com/research/9hw4xq/global) has announced the addition of the "Global Testosterone Market 2012-2016" report to their offering. Global Testosterone market to grow at a CAGR of 26.26 percent over the period 2012-2016. One of the key factors contributing to this market growth is the increasing aging population across the globe. The Global Testosterone market has also been witnessing an increasing number of R&D activities that are focused on developing testosterone replacement therapies. However, the entry of generics could pose a challenge to the growth of this market. Further, the report states that one of the major challenges … Read more »

Reading Time: < 1 minute(WXYZ) - Consumer Reports has issues a serious warning about popular drug that more and more men are taking: testosterone. Drugmakers spent more than $100 million last year to promote prescription testosterone, everything from gels and patches to injections. Just two years ago, the industry was spending a fraction of thata mere $14 million dollars. Todays the ads appear to be working, as sales are soaring. Men worried about their sexual health are being bombarded by commercials promoting testosterone. But Consumer Reports' Dr. John Santa says that despite the fact that testosterone treatment sales topped $2 billion in 2012, most … Read more »

Reading Time: < 1 minuteWashington, Feb 20 (IANS) Male superiority over females in spatial navigation may just be a "side-effect" of testosterone, according to an analytical study. Previous studies have shown that women who take testosterone see an improvement in their spatial navigation skills, says Justin Rhodes, professor of psychology at the University of Illinois, who led the study. Some argue, for example, that males' slight, but significant, superiority in spatial navigation over females is probably "adaptive", meaning that during evolution, the trait gave males an advantage that led them to have more offspring than their peers, the journal Quarterly Review of Biology reports. … Read more »

Reading Time: 2 minutesTreatments purporting to offer "male rejuvenation" and combat the effects of aging have become popular in recent years, but such claims are not backed up by science, experts say. Men seeking such treatments often receive testosterone, sometimes in combination with other hormones such as including steroids and growth hormones. Advertisers claim the treatments increase strength and sex drive, and make patients feel younger. However, studies examining the effects these treatments are lacking, and there's little evidence to support their use in men who don't have hormone deficiencies, experts say. "There's really no scientific evidence that they will help a man … Read more »

Reading Time: < 1 minuteMen worried about their sexual health are being bombarded by commercials promoting testosterone. "Lost your appetite for romance and your mood is on its way down? You might not just be getting older, you might have a treatable condition called low testosterone, or low-T." "You should know that Axiron is here - the only underarm treatment for low-T. That's right, the one you apply to the underarm." Consumer Reports' Dr. John Santa says - despite the fact sales of testosterone treatments topped two-billion dollars in 2012 - most men don't need it. "Even if you're worried about erectile dysfunction, treatment … Read more »

Reading Time: 2 minutesPUBLIC RELEASE DATE: 30-Dec-2013 Contact: Latarsha Gatlin lgatlin1@jhu.edu 443-997-9909 Johns Hopkins University For the male canary, the ability to sing a pitch-perfect song is critical to wooing female canaries. As the seasons change, so does song quality and frequency. The hormone testosterone plays a role in this changing song behavior. Researchers at The Johns Hopkins University have found that introducing testosterone in select areas of a male canary's brain can affect its ability to successfully attract and mate with a female through birdsong. They also found that enhancing song activity based on testosterone in one brain area can change the … Read more »

Reading Time: 2 minutesContext Steroid 5-reductase inhibitors are used to treat benign prostatic hyperplasia and androgenic alopecia, but the role of 5-dihydrotestosterone (DHT) in mediating testosterone's effects on muscle, sexual function, erythropoiesis, and other androgen-dependent processes remains poorly understood. Objective To determine whether testosterone's effects on muscle mass, strength, sexual function, hematocrit level, prostate volume, sebum production, and lipid levels are attenuated when its conversion to DHT is blocked by dutasteride (an inhibitor of 5-reductase type 1 and 2). Design, Setting, and Patients The 5-Reductase Trial was a randomized controlled trial of healthy men aged 18 to 50 years comparing placebo plus testosterone … Read more »

Reading Time: < 1 minuteINDIANAPOLIS - Several men claim to have found the "fountain of youth," but others say they're not too sure. The before and after pictures certainly are convincing. "I started at 245 pounds last October and now I am 185 pounds," said Frank Miller. Beyond the looks and weight loss, 35-year-old Frank Miller simply feels younger. "I do feel I am the person I was at 18 years old," he said. "I look great. I feel great and, you know, I am more active. I got more energy." Frank says the transformation started the day after he started testosterone replacement therapy, … Read more »

Reading Time: < 1 minuteBy Marcus Johnson Products marketed at middle aged western men looking to increase their energy levels, strength, and libidos have surged in recent years. Many of these products include testosterone therapy. Since 2010, there have been multiple studies on testosterone treatment, and there have been enough negative effects to prompt the FDA to start the reassessment process on drugs that use testosterone. Some of the negative effects of testosterone treatments in studies have been alarming, such as a Boston study which found that, while men taking the hormone were stronger, they were also up to five times as likely to … Read more »

Reading Time: < 1 minuteDiscovered: Nuclear accidents aren't so bad; diet soda is unhealthy; why men are such jerks; a new, old crocodile; college ruins marriageability. Diet soda is unhealthy. Please, please don't take away diet soda from us, science. Last week it was caffeine and now we can't even enjoy a mid-afternoon Diet Coke break without imagining heart attacks and hospital beds. Looking at 2,564 drinkers of calorie-free soda, researchers found cola addicts were 43 percent more likely to suffer a vascular event than those who abstained. Boo. Of course calorie-free, caffeinated, fizzy deliciousness kills us. Of course. [Journal of General Internal Medicine] … Read more »

Reading Time: < 1 minuteWhen Levels Were Low, Testosterone Replacement Led to Lost Weight, Smaller Waists May 9, 2012 -- Testosterone replacement may promote weight loss in obese older men who have low levels of the male sex hormone, a new study shows. But before men try to lose weight by bumping up their testosterone, experts agree that more studies are needed to show that the treatment is both safe and effective. Researchers followed a group of mostly older, overweight men receiving injections of the hormone for up to five years to treat erectile dysfunction and other symptoms associated with low testosterone. Their findings … Read more »