Articles tagged with Testosterone
Research by Mariana Muñoz-Romo and colleagues found that male fringed-lipped bats produce larger, more pungent forearm crusts in males with higher testosterone levels and larger testes. These findings suggest that the size of the crust is linked to mating and reproduction.
Researchers from the University of Queensland found that a vitamin D deficiency during pregnancy caused an increase in testosterone levels in male rats, potentially contributing to the higher prevalence of Autism spectrum disorder in boys. Vitamin D plays a critical role in brain development and may help prevent ASD-like traits when su...
A recent study published in the British Journal of Sports Medicine found that transgender women may still retain a competitive advantage in athletic performance even after more than 12 months of hormone therapy. The study, which reviewed fitness test results and medical records of 29 trans men and 46 trans women, suggests that governin...
A recent study found that COVID-19 can lead to lower testosterone levels in male patients, which may explain the better outcomes seen in female patients. The study also showed that hypogonadism, or low testosterone production, was present in over half of the male patients.
A Northwestern University study has identified the specific regions of brain tissue where a key gene named aromatase regulates male sexual behavior in mice. Aromatase converts testosterone to estrogen, driving male sexual activity. The discovery could lead to new treatments for disorders of low and compulsive sexual desire.
A longitudinal study of 167 children found that early adversity increases the risk of depression by flattening testosterone slopes, leading to reduced hippocampal growth and increased emotion dysregulation. The findings suggest a need for interventions targeting mental health problems resulting from early poverty.
A study published in The Journal of the American Osteopathic Association found that mindful yoga significantly reduced testosterone levels and improved symptoms of depression and anxiety in women with Polycystic Ovary Syndrome. The practice also showed promise in reducing androgen levels, including DHEA.
A recent study has found that men with erectile dysfunction are at a higher risk of death, even if their testosterone levels are normal. The research, which analyzed data from over 1,900 participants, suggests that sexual symptoms can be an early sign of increased cardiovascular risk and mortality.
Research suggests that low levels of sex hormone-binding globulin (SHBG) may be associated with an increased risk of ischemic stroke in postmenopausal women. The study, which examined data from over 13,000 women, found that those with the lowest SHBG levels were 51% more likely to have had a stroke.
A new study found that higher genetic testosterone levels increase the risk of type 2 diabetes by 37% in women and reduce it by 14% in men. Similarly, higher testosterone levels increase the risk of breast and endometrial cancers in women and prostate cancer in men.
Research published in the Endocrine Society's Journal of Clinical Endocrinology & Metabolism found that teens with obesity and PCOS have an altered gut microbiome compared to those without the condition. This altered microbiome is associated with higher testosterone levels, metabolic complications, and other health risks.
A new study published in The Journal of Urology found that a low-fat diet may be associated with lower testosterone levels in men. The study analyzed data from over 3,100 men and found that those on a low-fat diet had lower serum testosterone levels compared to those on an unrestricted diet.
The American College of Physicians recommends testosterone treatment for men with age-related low testosterone only to treat sexual dysfunction. Testosterone treatment has shown small improvements in sexual and erectile function, but not in energy, vitality, or cognition.
The American College of Physicians recommends treating testosterone deficiency for only sexual dysfunction, discontinuing treatment if symptoms don't improve, and avoiding other reasons for treatment. Testosterone treatment should not be initiated to boost energy or cognitive function due to lack of evidence.
A diet low in fat and high in egg whites has been shown to positively affect serum testosterone levels, contrary to previous assumptions about the impact of healthy fats. The study's findings suggest that consuming albumen - the protein in egg whites - can increase testosterone levels by four-fold relative to fasting.
A study found that young male cancer survivors with low testosterone levels experienced an average decrease in fat mass and increase in lean mass when treated with testosterone replacement therapy. However, there was no effect on quality of life.
A clinical trial found that testosterone significantly increases young women's running capacity, with a notable impact on anaerobic performance and lean body mass. The study suggests that allowing female athletes with high testosterone levels to compete without hormone reduction could be fair.
Research found a single circuit in mice that activates during stress, controlled by testosterone, driving different behaviors in males and females. In female brains, the circuit is active under stress but quietens with testosterone introduction, making them resistant to depression-like behaviors.
USC researchers have successfully grown human testosterone-producing cells in the lab, paving the way to treat low testosterone with personalized replacement cells. The breakthrough could potentially bypass side effects associated with current treatments, such as infertility and increased risk of prostate cancer.
Researchers found that women with asthma are more likely to have lower levels of free testosterone and estradiol compared to those without asthma. Elevated sex hormone levels were associated with reduced odds of asthma in both men and women, particularly obese individuals.
A recent study suggests that smoking during pregnancy may damage daughters' future fertility due to increased testosterone exposure. The research found a significant correlation between maternal smoking and anogenital distance in female infants, which is a marker of testosterone levels.
A new study found that only a small percentage of men taking long-term opioids were screened for and treated for low testosterone. The research suggests a widespread underscreening for this condition, which can have significant effects on men's health and quality of life.
A large-scale study found no evidence that testosterone reduces cognitive empathy, challenging the 'extreme male brain' hypothesis of autism. The study, involving nearly 650 men, used randomized controlled trials and behavioral tasks to measure cognitive empathy.
The Endocrine Society and international partners endorse a statement clarifying benefits and risks of testosterone therapy for women. Testosterone therapy has been shown to improve sexual wellbeing in postmenopausal women with Hypoactive Sexual Desire Dysfunction (HSDD), reducing concerns and distress about sex.
A survey of over 3,400 former NFL players reveals a strong link between concussion history and low testosterone and erectile dysfunction. Researchers found that even relatively few concussion symptoms can increase the risk of ED, and the condition may persist for decades after injury.
Researchers found that testosterone supplements made people more sensitive to moral norms, contradicting earlier studies that linked high levels of testosterone to immoral behavior. The study suggests that testosterone's influence on behavior is more complex than thought.
A comprehensive systematic review and meta-analysis of testosterone treatment for women found significant improvements in sexual desire, function, and pleasure. Non-oral formulations appear to have fewer side effects compared to oral testosterone, with benefits including reduced concerns and distress about sex.
Researchers from the University of Otago propose a more nuanced approach to gender divisions in elite sports, considering principles of inclusion and fairness. They suggest alternatives to current guidelines, including options for transwomen's participation, to balance diversity and fair competition.
A study found that women's immune response to the flu vaccine is stronger than men's, but declines with age, especially in women. Researchers discovered that estrogen levels boost female immunity, while testosterone has a weaker effect on male responses.
Researchers reviewed 50 testosterone-boosting supplements and found that only a few had data to support their claims. Many supplements contained high doses of vitamins and minerals without any proven effects on testosterone levels. The study recommends more regulation around these supplements to protect consumers.
Top female athletes have higher testosterone levels, which enhance physical performance and raise questions about fairness in competition. The European Society of Endocrinology recommends a maximum testosterone level of 5.0 nmol/L for female athletic events to ensure competitive fairness.
Chemists at Tokyo Tech design a capsule-shaped synthetic receptor that exhibits high binding affinity towards male steroid hormones, enabling ultrasensitive detection of testosterone. The receptor's unique cavity structure contributes to its selectivity and is promising for medical and sports applications.
Research suggests that higher circulating SHBG levels are associated with a lower risk of asthma, particularly in women. The study found that higher SHBG levels were linked to around a 14% lower odds of asthma, although the exact mechanism is unclear.
Transgender men undergoing testosterone therapy may retain their fertility potential even a year into treatment, according to researchers. The study found preserved ovarian function and unchanged hormone levels, suggesting well-preserved reproductive capabilities.
A study in mice suggests that altering the gut microbiome via prebiotics or probiotics may be a potential treatment for PCOS. The research found improvements in testosterone levels, ovulation, weight, and insulin resistance in mice with PCOS, linked to changes in gut bacteria composition.
Experts argue that new regulations challenging women with differences of sex development are based on limited scientific data and may set an unscientific precedent. Blood testosterone levels vary naturally in men and women, making it difficult to determine direct associations between testosterone levels and sports performance.
Research finds that female twins exposed to prenatal testosterone from a male twin are less likely to graduate from high school or college, have lower fertility rates, and earn less by their early 30s. The study supports the 'twin testosterone-transfer hypothesis' and suggests long-term biological effects on behavior and outcomes.
A study found that female twins exposed to high levels of prenatal testosterone may be more likely to drop out of school, have fewer children, and earn lower salaries. Prenatal testosterone exposure is linked to various negative outcomes in human females.
Researchers have found that testosterone replacement therapy reduces prostate cancer recurrence in low-risk patients by nearly three-fold over three years. This study challenges the long-held notion that testosterone promotes prostate cancer and suggests a potential new treatment approach for these patients.
A new study led by Professor Mary Schooling found that testosterone is associated with a higher risk of blood clots and heart failure in men, but not heart attack. The findings suggest targeting testosterone could be a timely new avenue for preventing ischemic cardiovascular disease.
A study published in The BMJ found a genetic link between high testosterone levels and increased risk of blood clots, heart failure, and heart attacks in men. Researchers suggest that treatments lowering testosterone levels could help protect against these conditions, particularly in men.
Research by Eleonora Zakharian and colleagues reveals that the absence of TRPM8 leads to increased aggression and hypersexuality in mice. The team found that males with TRPM8 knockout exhibit violent behavior, while females show increased sexual appetite and sniffing behaviors.
Researchers found that androsterone, a steroid hormone produced by the placenta, plays a crucial role in male genital development. The study also suggests that placental dysfunction can lead to disorders of male genital development.
Researchers found that female manakins can produce a male-specific 'chee-poo' vocalization when implanted with testosterone, while untreated females cannot. In contrast, juvenile males who received testosterone exhibited vocalizations closer to those of treated females than adult males in the wild.
Researchers found that moderate cannabis use is associated with higher sperm concentrations and testosterone levels compared to non-smokers. However, the study highlights the need for more research on the effects of cannabis on reproductive health due to limitations in the data collection process.
A Rutgers study found that hormone concentrations in early fetal development are significantly affected by maternal age, body mass index, and race. Older mothers, heavier women, and those of African descent had distinct hormone profiles, with potential implications for future health risks such as breast and ovarian cancer.
A new study reveals that testosterone use can significantly increase bone mineral density (BMD) in HIV-infected men. In particular, testosterone was associated with a higher BMD score at the lumbar spine in virologically suppressed individuals.
A review of 28 studies found that bariatric surgery increased testosterone levels and improved erectile function in obese men, but had no impact on sperm parameters. However, nutritional malabsorption may counterbalance these hormonal changes.
A study published in Proceedings of the National Academy of Sciences found that age-related increases in estrogen levels can weaken abdominal walls and cause inguinal hernias. The researchers discovered that a hormone inhibitor could strengthen muscles and prevent hernias, offering potential treatment for at-risk patients.
A new study by Northwestern University researchers found that male mountain gorillas who spend more time with their group's children are more reproductively successful. The study suggests an alternative pathway to the evolution of fathering behavior in humans, where males may not necessarily know their offspring.
A first-of-its-kind study found that fathers' hormone levels around the birth of their children relate to their parenting down the road. Dads whose cortisol levels were elevated while holding their newborns on the day of birth were more likely to be involved in indirect care and play with their infants in the first months of life.
Long-term testosterone supplementation has been linked to increased blood pressure in obese rats, raising concerns about its safety in certain populations. The study suggests that hormone therapy may not be beneficial for men with heart disease risk factors, highlighting the need for more research on complex effects of testosterone.
Testosterone treatment over 10 years can improve or reverse type 2 diabetes in men with low testosterone, leading to significant weight loss. The study found that average fasting blood glucose levels decreased and HbA1c levels fell in the testosterone-treated group, while worsening in the control group.
Researchers at The University of Texas Medical Branch found that testosterone replacement therapy reduces respiratory hospitalizations in middle-aged and older men with chronic obstructive pulmonary disease (COPD). This suggests that testosterone replacement therapy may slow the progression of COPD in these individuals.
A study by UC Riverside researchers found that male mice on high-fat diets experienced neuroinflammation and reduced testosterone levels, while female mice remained protected. The findings suggest ovarian estrogen plays a crucial role in protecting females against weight gain and associated health issues.
Men who believe they've won a competition experience increased testosterone levels, self-perceived attractiveness, and confidence in approaching women. This 'plasticity' allows their bodies to adapt quickly to suit a perceived change in social status.
Researchers found a significant link between polycystic ovary syndrome (PCOS) and the risk of having an autistic child. Women with PCOS were 2.3% more likely to have an autistic child, compared to those without PCOS.
A 60-year-old amateur weight-lifter developed non-ischaemic cardiomyopathy after taking high doses of testosterone and receiving illegal stem cell infusions. Doctors warn that AAS abuse can cause heart problems in people without usual risk factors, especially when taken at high doses.
A new study from Purdue University finds that early puberty in white adolescent boys is associated with a higher risk of substance use. Testosterone activity, rather than physical changes or social pressures, contributes to this increased risk.
Testosterone prescriptions decreased in men without a clear indication following reports of increased heart attacks and strokes associated with testosterone use. The steep decline coincided with the FDA safety bulletin, leading to a decrease in prescribed testosterone therapy in the US.