Articles tagged with Testosterone
A shorter course of androgen deprivation therapy (ADT) has been found to improve the quality of life for high-risk prostate cancer patients, with faster recovery times and better outcomes compared to a longer 36-month ADT regimen. The study analyzed data from 561 patients who received radiation therapy and long-term ADT.
Researchers found significantly decreased estrogen receptor beta expression in autistic male brains, which may explain the disorder's higher prevalence in boys. Estrogen receptor agonists could potentially reverse autism's behavioral deficits, such as reclusiveness and repetitive behavior.
A recent study found that males with more masculine faces tend to have lower semen quality due to increased testosterone levels impairing sperm production. Males often overestimate the attractiveness of other men to females.
A new study found lower testosterone levels in men with sudden cardiac arrest and higher estradiol levels in both men and women were associated with increased risk. The research suggests that hormone levels may play a role in predicting patients' likelihood of suffering from the usually fatal condition.
A study published in Scientific Reports found that methadone treatment significantly suppresses testosterone levels in men with opioid addiction, leading to poor quality of life and erectile dysfunction. In contrast, women using methadone for addiction treatment showed no significant change in testosterone levels.
A new study found an inverse relationship between phthalate exposure and testosterone levels in various populations, including boys ages 6-12 and men and women ages 40-60. Increased phthalate concentrations were associated with a decline in testosterone levels, potentially impacting reproductive development and sexual function.
A new study published in Biological Psychiatry found that testosterone increases the brain's reactivity to threat cues in healthy men. The study used a novel two-step pharmacological challenge paradigm and found that testosterone increased activity in brain structures involved in threat processing and aggressive behavior.
A new study finds that human skulls changed in ways indicating a lowering of testosterone levels during the time culture was blossoming. The research team argues that human society advanced when people started being nicer to each other, leading to more cultural exchange and cooperation.
A study found that more left-handed men are born during November, December, and January, with 10.5% of left-handed men born during this period. The researchers suggest a hormonal cause, possibly related to the relative darkness during these months, which delays the maturation of the left brain hemisphere during embryonic development.
A new US-based study of over 25,000 older men shows that testosterone therapy is not associated with an increased risk of heart attack. In fact, men with cardiovascular problems who used testosterone had a lower rate of heart attacks compared to those who did not.
A new study found that soy protein supplements containing phytoestrogens do not reduce testosterone levels in men with Type 2 diabetes. Instead, they improve diabetes control and cardiovascular risk factors. The supplements also show promise in reducing the risk of heart disease.
A study published by the Endocrine Society found that low testosterone levels are linked to a higher risk of declining physical function in older men. The researchers also discovered that muscle weakness, possibly caused by decreased testosterone levels, may explain most of this relationship.
A new study found that testosterone replacement therapy can improve aerobic capacity and lessen its decline with age in older men with limited mobility. The therapy showed a significant reduction in the rate of decline of an important marker of physical fitness in these men.
A recent study published in Menopause found that low doses of testosterone cream for women after menopause can bring their testosterone levels back to normal. The study tested two doses of the AndroFeme product, with the 5-mg dose being sufficient to restore premenopausal levels.
Research in mice reveals that a previously developed testosterone-based male contraceptive method cannot stop sperm production. Increasing doses of testosterone allowed sexual function to return, but also initiated sperm production, making it impossible to achieve sustained cessation.
Men with low-risk prostate cancer who have low testosterone levels may be at increased risk of developing more aggressive disease. Low levels of free testosterone were significantly linked to an increased risk, suggesting a contradictory role for testosterone in prostate cancer progression.
The prescription of testosterone in older men is associated with unclear cardiovascular risk. Despite the benefits in younger men, ongoing studies are unlikely to provide reliable safety data due to limited sample sizes and power.
A study by Spanish researchers suggests that women's intuition is related to lower prenatal exposure to testosterone, leading to a more intuitive and less reflective mindset. This effect is stronger among women, who tend to give more intuitive answers in cognitive tests.
A new study suggests that low testosterone exposure in the womb may influence male susceptibility to serious health conditions like obesity and heart disease. Researchers found that reduced testosterone levels in fetal testes can impair Leydig cell function, leading to lifelong health consequences.
A multi-site study will test strategies to improve bone and muscle strength after spinal cord injury, with the goal of minimizing secondary complications. The study aims to develop safe and effective interventions to address rapid wasting of muscles and bones in individuals with SCI.
A recent study by a University of Chicago professor found that night owls, both males and females, are more likely to be single or in short-term romantic relationships than early risers. Night owls also reported higher numbers of sexual partners compared to early birds.
A study published in Psychological Science found that children who participated in the Fast Track program showed reduced aggression later in life. The researchers believe that the program's success may be linked to changes in testosterone reactivity to social threats.
Researchers from the University of Edinburgh found that newborn male deer with high testosterone levels are less likely to survive their first year compared to peers. The study also showed that testosterone levels in offspring are linked to their mother's condition, suggesting a potential survival advantage for younger calves.
A new study suggests that male hormones, such as testosterone, play an important role in female fertility and may enhance IVF success rates. The research found that male hormones promote follicle development by preventing cell death and increasing sensitivity to follicle-stimulating hormone.
A recent study reviews existing research on sports competition and concludes that playing at home can have a significant psychological impact on athletes, with findings including increased testosterone levels and higher cortisol stress hormone levels. However, the exact mechanisms behind this phenomenon are still unclear.
A large health care database study has found a twofold increase in the risk of heart attacks among men under 65 using testosterone therapy. The research also confirmed earlier findings that men over 65 experience a similar increased risk.
A study found that adding testosterone to hormone therapy did not significantly improve quality of life, self-esteem, or mood in women with primary ovarian insufficiency. Normalizing testosterone levels may not address underlying factors contributing to mood problems.
A study found that testosterone use has increased sharply among older men in the US and UK, with many having normal testosterone levels and non-specific symptoms. The Endocrine Society's guidelines recommend a clinical diagnosis of low testosterone only for men with consistent symptoms and unequivocally low hormone levels.
Researchers at Johns Hopkins University found that testosterone enhances male canary's motivation to sing but not the quality of their songs. The hormone affects different brain areas, increasing song frequency but not altering its attractiveness to females.
A Stanford University School of Medicine study found that men with high testosterone levels have a weakened immune response to the flu vaccine, whereas women and men with lower testosterone levels have a stronger response. The study also discovered that testosterone interacts with genes in a way that dampens immune response.
A new study suggests that testosterone levels may affect the body's response to vaccines, with men often experiencing weaker antibody responses than women. Researchers found that men with high levels of testosterone had suppressed immune responses, which could be linked to their sex-specific differences in infections and vaccinations.
Two new studies published in Menopause journal show that low-dose flibanserin improves sexual function in postmenopausal women, while high-dose testosterone also yields benefits, but with cautionary notes on cardiovascular risks.
Researchers found that higher doses of testosterone improved sexual function, muscle mass, and physical performance in postmenopausal women who had undergone hysterectomy. However, side effects such as unwanted hair growth and acne were rare in the study.
A study published by The Endocrine Society found that older men with optimal testosterone levels lived longer, while those with high or low levels had a higher mortality risk. Higher DHT levels were also associated with reduced ischemic heart disease mortality.
A recent study found that men using testosterone therapy have a 29% higher risk of death, heart attack, and stroke compared to those not using the treatment. The study, which analyzed data from over 8,000 patients, highlights the need for caution when prescribing testosterone therapy.
A study found that testosterone therapy was associated with a higher risk of adverse outcomes, including death, heart attack, or ischemic stroke, in men who underwent coronary angiography. The use of testosterone therapy was also linked to an increased risk of these events even among patients without underlying coronary artery disease.
A recent study published in The Endocrine Society's journal refutes the long-held belief that a protein is necessary for producing steroid hormones like testosterone. Researchers found that male mice with a specific protein deficiency produced normal levels of testosterone, challenging the existing scientific understanding.
An observational study found that testosterone treatment reduced total cholesterol, LDL, triglycerides, and increased HDL in hypogonadal men. Testosterone therapy also lowered systolic and diastolic blood pressure, suggesting a reduction in hypertension.
Research suggests that testosterone promotes generosity and reciprocity when there is no threat of competition, helping to maintain social relationships. In the absence of competition, participants with increased testosterone levels chose to give more money back to investors than those with placebo treatment.
A recent study found a modest connection between low testosterone and an increased risk of developing or dying from heart disease. However, treating low testosterone with hormone replacement therapy did not have any beneficial effect on cardiovascular health.
A study by Massachusetts General Hospital researchers finds that insufficient estrogen is partly responsible for some age-related symptoms in men. Testosterone levels regulate lean body mass, muscle size and strength, while estrogen regulates fat accumulation.
A new study by Emory University researchers found that men with smaller testes tend to be more involved in hands-on childcare, while those with larger testes are less involved. The study suggests that the biology of human males reflects a trade-off between investments in mating and parenting effort.
A study published in Clinical Science found that a meal plan prioritizing breakfast intake can reduce insulin resistance, lower testosterone levels, and increase ovulation frequency in women with PCOS. This natural therapy may provide new hope for those struggling with fertility issues associated with the disorder.
UCSB researchers found that tree chopping increases testosterone levels more than soccer, improving muscle energy and performance. The study suggests that Tsimane men maintain high testosterone levels due to their physically demanding lifestyle, contrary to industrialized populations.
Researchers found that keeping a secret can change the way people interact with others, leading to more deceptive behavior among friends and superficial positivity towards acquaintances. Additionally, high neuroticism and low conscientiousness are consistently associated with increased risk of obesity across various samples. Confrontin...
A new study by Rush University Medical Center researchers found that a sudden decrease in testosterone levels may cause Parkinson's-like symptoms in male mice. Testosterone supplementation reversed the pathology in the mice. The study suggests that preserving testosterone levels may be important to prevent Parkinson's disease.
A new study in mice finds that low testosterone worsens obesity-related brain damage, increasing the risk of type 2 diabetes and Alzheimer's disease. Obese mice with low testosterone showed more body fat, higher blood sugar levels, and poorer glucose tolerance than those with normal testosterone.
A new study published in The Endocrine Society's Annual Meeting found that testosterone therapy improved verbal learning and memory in postmenopausal women compared to placebo. Testosterone levels increased with treatment but remained within normal female range, with no major side effects reported.
A new study suggests that testosterone therapy can reduce pain perception and tolerance in men with low testosterone levels caused by opioid pain relievers. The study found significant improvements in pain sensitivity during laboratory pain testing after testosterone administration compared to placebo.
A clinical study found that high-dose testosterone significantly improves sexual function among women who have had their uterus and ovaries removed. Women receiving 25mg of testosterone experienced improved blood concentrations of free testosterone, related to increased sexual encounters.
A study found that testosterone therapy prescriptions increased significantly over 10 years, with 2.29% of men in their 40s and 3.75% of men in their 60s taking some form of testosterone therapy. The trend is driven by direct-to-consumer marketing campaigns and the expansion of low-T centers.
A new study published in Psychological Science found that high-testosterone males are more likely to choose the color red when competing. The research suggests that this association may be related to biological systems and affect how opponents respond. However, actual performance in the competitive task was not influenced by color choice.
A University of Missouri study found that male testosterone levels surge during group competitions against rivals, but remain unchanged when competing with friends. This hormonal reaction is linked to the evolution of human cooperation and coalition formation.
Researchers at UC Santa Barbara have found two hormonal signals that predict sexual motivation in young women. Estrogen levels surge two days before the increase in sexual desire, while progesterone levels drop during the luteal phase, leading to a decrease in sexual motivation.
A multicenter study found that 84% of lung cancer patients taking crizotinib have low testosterone levels, with 80% experiencing symptoms such as sexual dysfunction or depression. The study suggests that hormone replacement therapies may alleviate these symptoms and provide a new treatment option for affected patients.
Researchers found that audiences affect quails' social status, with losers losing dominance when observed, but winners retaining it regardless of audience presence. Testosterone levels were raised in both winners and losers after fights, suggesting a secondary role for the hormone.
Research suggests hormonal changes may precede development of rheumatoid arthritis in men. Men with low testosterone levels were found to be more likely to develop the disease, even after adjusting for other risk factors.
A study by University of Missouri researchers found that adult males' testosterone levels decrease when they interact with the spouse of a close friend. This suggests an innate biological mechanism that discourages men from pursuing romantic relationships with friends' wives, promoting cooperation and alliance formation.
A Dutch study found that abiraterone can block androgen receptor activation directly, in addition to inhibiting CYP17A1 activity. This suggests a new mechanism of action for treating castration-resistant prostate cancer.
A new study from Kaiser Permanente found that men on long-acting opioids are 5 times more likely to have low testosterone levels than those on short-acting opioids. The study compared 81 men with chronic pain and found that long-acting opioids significantly increased the risk of low testosterone.