Testosterone

Testosterone is a steroid hormone from the androgen group. In mammals, testosterone is primarily secreted in the testes of males and the ovaries of females, although small amounts are also secreted by the adrenal glands

Testosterone Physiological Effects

Testosterone is the principle male sex hormone and is responsible for reproductive growth and development in male vertebrates.

Testosterone Mechanism

Testosterone Treatments

What is Testosterone?

Testosterone Replacement Therapy for Men: Risks and Benefits

Testosterone Biochemistry

Latest Testosterone News and Research

Study debunks "No Nut November" claims: Abstinence shows no health benefits or harms

A new study in The Journal of Sexual Medicine found that participating in “No Nut November”, a month-long abstinence challenge, had no measurable effect on sexual well-being. The only significant difference was that participants reported higher sexual flexibility, likely reflecting a pre-existing trait.

29 Jul 2025

Promising new male birth control pill could be taken every three days

YCT-529, a novel non-hormonal male contraceptive, demonstrates safety and tolerability in early trials, offering a potential solution for male birth control.

28 Jul 2025

Shared brain circuit drives opposite mating behaviors in male and female mice

In animals with social structures, the drive to reproduce is a complex process; governed by the brain, it's influenced by both internal cues such as hormones and external factors such as interactions with potential mates.

16 Jul 2025

Weight loss drugs can boost testosterone in men with obesity or diabetes

Anti-obesity medications can significantly raise testosterone levels and improve health outcomes for men with obesity or type 2 diabetes, according to a new study being presented Monday at ENDO 2025, the Endocrine Society's annual meeting in San Francisco, Calif.

14 Jul 2025

Exposure to endocrine-disrupting chemicals in early life linked to cravings for sugary and fatty foods

Exposure to endocrine-disrupting chemicals in early life, including during gestation and infancy, results in a higher preference for sugary and fatty foods later in life, according to an animal study being presented Sunday at ENDO 2025, the Endocrine Society's annual meeting in San Francisco, Calif.

13 Jul 2025

Blood sugar levels found to impact sexual health in aging men

Metabolic health factors, including small increases in blood sugar, are the main drivers of change in the reproductive systems and sexual functioning of aging men, according to a study being presented Saturday at ENDO 2025, the Endocrine Society's annual meeting in San Francisco, Calif.

12 Jul 2025

Vaping versus smoking’s impact on male fertility

A new study found that male E-cigarette users undergoing IVF had higher sperm motility and lower miscarriage rates compared to conventional smokers. However, E-cigarettes were not shown to be safe and further research is needed before recommending them for fertility.

6 Jul 2025

Early childhood weight and illness linked to future health risks in men

New research has shown how boys being overweight in early childhood or having chickenpox or another infectious disease in infancy may increase their risk of having chronic disease in later life.

3 Jul 2025

Study shows polar winter challenges men’s muscle mass but not hormone levels

Researchers tracked testosterone, cortisol, and body composition in 23 men overwintering at Concordia Station, Antarctica. Despite extreme polar conditions, hormone levels remained stable, though nearly half the crew experienced significant muscle loss.

26 Jun 2025

$Men face silent threat of weak bones and fractures$

Men face silent threat of weak bones and fractures

Weak bones can have deadly consequences. Women often get bone density tests to screen for osteoporosis, yet many men don't even realize they are at risk until they suffer a major fracture.

25 Jun 2025

Mediterranean diet boosts sperm health while ultra-processed foods lower fertility, study finds

Adherence to the Mediterranean diet is linked to improved sperm parameters in men, while high intake of ultra-processed foods is associated with poorer semen quality. These associations are strongest in men with normal FSH levels, suggesting dietary patterns may influence male fertility.

23 Jun 2025

Men lose more weight than women on the keto diet, new study reveals why

Men lose more weight than women on a ketogenic diet, according to a comprehensive review in Frontiers in Nutrition. Sex differences in hormones, metabolism, and fat distribution influence the effectiveness of the ketogenic diet for obesity.

22 Jun 2025

Placenta and prenatal hormones may drive human brain evolution

The placenta and the hormones it produces may have played a crucial role in the evolution of the human brain, while also leading to the behavioral traits that have made human societies able to thrive and expand, according to a new hypothesis proposed by researchers from the Universities of Cambridge and Oxford.

20 Jun 2025

Night shift work increases risk of severe asthma in women

Women who work night shifts are more likely to suffer with moderate or severe asthma compared to women who work in the daytime, according to a study published today (Monday) in ERJ Open Research.

16 Jun 2025

New AI test identifies prostate cancer patients who benefit from abiraterone

A new artificial intelligence (AI) test can identify which men with prostate cancer will benefit most from the life-extending drug abiraterone, in clinical trial results presented by scientists from UCL and the Institute of Cancer Research.

30 May 2025

Unlocking the secrets of human longevity and healthy aging

Human healthy aging and longevity are complex phenomena influenced by a dynamic interplay of genetic, epigenetic, metabolic, immune, and environmental factors.

22 May 2025

Discovery unravels two populations of gonadotrophs in the pituitary gland

Researchers at the Francis Crick Institute have shown that gonadotrophs, cells in the pituitary gland with a key role in puberty and reproduction, come from two different populations, with the majority produced after birth rather than in the embryo, as previously thought.

21 May 2025

Sucralose disrupts male fertility by damaging sperm and altering hormones in animal study

Researchers found that chronic sucralose exposure in male rats disrupted reproductive hormones, damaged sperm, and impaired testicular function through oxidative stress and autophagy dysregulation. These findings raise concerns about the reproductive risks of high sucralose intake and its persistent presence in the environment.

19 May 2025

$Testosterone gel fails to boost recovery after hip fracture in women$

Testosterone gel fails to boost recovery after hip fracture in women

Hip fractures, often a result of a fall, are the most serious type of osteoporotic fracture because they are accompanied by considerable pain, loss of muscle and bone strength, reduced mobility and independence with daily activities, and increased risk for future fractures and death.

15 May 2025