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Males with elevated levels of testosterone lead shorter lives but have more success siring offspring
Comparative studies have studied testosterone levels and related them to mating systems and aggression, but very few studies have attempted to relate testosterone to fitness, that is, the combination of lifetime reproductive success and survival, in the wild or experimentally.   view more (2006-04-13)

Do testosterone patches help women with under-active pituitary glands?
New research published today in The Journal of Clinical Endocrinology & Metabolism showed the first positive effect of testosterone on bone density, body composition and emotional, cognitive and behavioral function in women with low testosterone levels resulting from under-active pituitary... view more (2006-05-10)

The price of vanity: Mating with showy males may reduce offspring's ability to fight off pathogens
In many animals, males advertise to potential mates with showy traits, many of which are linked to testosterone levels. However, a new study suggests that, in fish, choosing a flashier mate may cause future generations to be more susceptible to pathogens.   view more (2007-01-11)

Testosterone therapy may prevent Alzheimer's disease
Researchers at the University of Southern California have discovered a direct link between loss of testosterone and the development of an Alzheimer's-like disease in mice. They also discovered that testosterone treatment slows progression of the disease.   view more (2006-12-20)

Testosterone, territoriality and the ‘home advantage’ in football
The `home advantage` is well known in football. The majority of teams in all divisions score more goals and win more games at home than away. Factors such as crowd support, referee bias, and familiarity with a venue, have been used to explain home advantage. New research presented today, Saturday... view more (2002-02-27)

Low testosterone levels associated with increased risk of death in men
Men who have a low testosterone level after age 40 may have a higher risk of death over a four-year period than those with normal levels of the hormone.   view more (2006-08-15)

Study finds that even aloof husbands have lower testosterone levels than unmarried men
A fascinating new study is the first outside of North America to observe lower testosterone levels among married men.   view more (2007-10-10)

So-called "male menopause" in ageing men linked to higher risk of heart disease
The so-called "male menopause," with its lowered testosterone levels, may help to explain why men suffer more heart disease as they grow older, contend doctors in the current issue of Heart. Whether the male menopause, also referred to as the andropause, truly exists is a contentious... view more (2003-01-14)

Elderly men with low testosterone levels more likely to fall
Low testosterone levels may be associated with a higher risk of falling in older men.   view more (2006-10-24)

No link between short-term testosterone use and prostate cancer, study says
Testosterone therapy does not cause adverse effects on the prostate in older men with hypogonadism, commonly known as low testosterone or low T, according to a clinical trial presented today at a national urology meeting in Atlanta.   view more (2006-05-22)

Estrogen plus testosterone therapy may increase risk of breast cancer in postmenopausal women
Women who take a combination of estrogen and testosterone to treat the symptoms of menopause may have an increased risk of breast cancer.   view more (2006-07-25)

Many men with low testosterone levels do not receive treatment
The majority of men with androgen deficiency may not be receiving treatment despite having sufficient access to care, according to a report in the May 26 issue of Archives of Internal Medicine, one of the JAMA/Archives journals.   view more (2008-05-27)

Benefits of testosterone treatment unknown, research shows
Little research exists demonstrating that testosterone is both safe from the cardiovascular standpoint and effective to treat sexual dysfunction, reveal Mayo Clinic researchers in two new studies.   view more (2007-01-10)

Low testosterone levels associated with risk of fracture in men over 60
Men over age 60 who have low blood testosterone levels may be at a higher risk for fractures.   view more (2008-01-15)

Sleep quantity affects morning testosterone levels in older men
The testosterone levels of healthy men decline as they get older. As sleep quality and quantity typically decrease with age, objectively measured differences in the amount of sleep a healthy older man gets can affect his level of testosterone in the morning.   view more (2007-04-02)

Exercise boosts sex hormone in older men
Older men who take regular and intensive exercise produce more growth hormone and testosterone, the male sex hormone, than those who lead an inactive life, according to researchers at the University of Newcastle-upon-Tyne. Men aged 55-65 who ran more than 40 miles a week were found to have higher... view more (2000-05-30)

Testosterone therapy may help elderly men with mild Alzheimer's disease
Testosterone replacement therapy may help improve the quality of life for elderly men with mild cases of Alzheimer's disease.   view more (2005-12-13)

Testosterone key to disease transmission
High levels of testosterone may be a key factor in spreading disease among mice, according to biologists. The findings could help explain why males in a population are often more likely to get infected, and transmit disease.   view more (2008-08-11)

Testosterone supplementation for older men appears to have limited benefit
Older men with low testosterone levels who received testosterone supplementation increased lean body mass and decreased body fat, but were no stronger and had no improvement in mobility or cognition compared with men who did not use the supplement, according to a study in the January 2 issue of... view more (2008-01-02)

Low estrogen levels in men linked to increased risk for hip fracture
A new study has found that men with low estrogen levels have an increased risk for future hip fracture, and those with both low estrogen and low testosterone levels have the greatest risk.   view more (2006-05-01)

Testosterone Replacement Therapy: How Safe For Aging Men?
For decades, older women have taken hormone replacements to replenish estrogen and progesterone levels lost to aging. More recently, testosterone (the most important male hormone) supplements have been used by aging men to improve their muscle mass, bone strength, libido and quality of life.   view more (2007-08-09)

Elevated testosterone kills nerve cells
A Yale School of Medicine study shows for the first time that a high level of testosterone, such as that caused by the use of steroids to increase muscle mass or for replacement therapy, can lead to a catastrophic loss of brain cells.   view more (2006-09-27)

The latest about male infertility and testosterone from NewYork-Presbyterian/Weill Cornell
Two reports from physician-scientists at NewYork-Presbyterian Hospital/Weill Cornell Medical Center shed new light on male infertility.   view more (2007-10-18)

No link found between low androgen levels and low sexual function in women
No single androgen (sex hormone) level was found to be predictive of low sexual function in women, according to a study in the July 6 issue of JAMA.   view more (2005-07-06)

Academics find that the finger of destiny points their way
Male scientist are good at research because they have the hormone levels of women and long index fingers, a new study says.   view more (2004-10-19)
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