All articles tagged with #testosterone
The Department of Defense announced a program to screen service members aged 30 and older for testosterone deficiency during annual health assessments, with under-30 soldiers able to opt in; treatment, including testosterone replacement therapy, is voluntary and aimed at maintaining peak physical and mental readiness and long-term health.
A large, multi-country meta-analysis of 118,593 men from 1972–2019 found total testosterone declined by 54% worldwide, averaging more than 1% per year and accelerating after 2000, beyond age-related declines; the researchers note obesity and metabolic syndrome could explain part of the drop and highlight potential roles for environmental chemicals, lifestyle factors, and other health trends, with implications for overall male hormonal health and fertility.
A meta-analysis of six longitudinal studies across five countries shows average total testosterone in men fell about 54% from 1972 to 2019, a decline over 1% per year. While natural variation exists, the population-wide drop could signal broader health issues linked to obesity, diabetes, and environmental factors affecting male health, warranting further investigation.
Six longitudinal studies with 118,593 men from Israel, the US, Brazil, Finland and Denmark show total testosterone declined by about 54% from 1972 to 2019, with steeper falls after 2000. While obesity and metabolic syndrome likely explain part of the drop, researchers say environmental factors such as endocrine-disrupting chemicals and climate change could also contribute. The findings fuel debate about a male fertility crisis, but causality is not settled; reducing exposure to hazardous chemicals and addressing health factors are urged, and testosterone therapy can suppress sperm production.
A meta-analysis of 118,593 men from Israel, the U.S., Brazil, Finland, and Denmark found average testosterone levels declined by about 54% between 1972 and 2019, a finding presented at the European Society of Human Reproduction and Embryology meeting in London.
A doctor outlines four red-flag symptoms men often hide—enlarged but painless testicles, erectile dysfunction, urinary frequency, and fatigue/decreased sex drive—and explains they can indicate testicular cancer, vascular disease, diabetes, or low testosterone, making early reporting to a clinician crucial for better outcomes.
The Trump administration proposed relaxing some federal restrictions on testosterone prescriptions, aiming to help men with low testosterone—thought to contribute to various health issues—access a range of therapies, from nasal gels to injections, amid ongoing debate about whether boosting testosterone can truly address aging-related health problems.
Conan O’Brien jokes that a drop in testosterone after his daughter’s birth may explain his calmer, less intense midlife persona—a tongue-in-cheek nod to male menopause; experts note that testosterone declines with age and can affect energy and mood, but personality is shaped by many factors beyond biology.
Comedian Conan O’Brien, 63, describes a quieter, less intense shift in himself that he now attributes in part to age-related testosterone decline (andropause), sparked by a conversation with his mother-in-law. Experts note that testosterone can affect motivation, mood and emotional reactivity beyond libido, though personality isn’t solely defined by hormones. Low testosterone is common with aging and linked to health risks, but treatment options exist after medical evaluation.
Experts warn that signs often blamed on low testosterone—such as reduced sex drive, low energy, and erectile dysfunction—can reflect other health issues like depression, sleep apnea, thyroid problems, anemia, or diabetes. With online testosterone replacement therapy on the rise, many men are prescribed testosterone without proven low levels (only about 12% of those prescribed actually have low T). A full medical evaluation is essential, as symptoms may stem from multiple conditions rather than low T alone.
An international analysis of 11 long-term studies including over 26,000 men found that very low testosterone levels are associated with a higher risk of cancer diagnosis and cancer death, particularly when testosterone falls below about 7.3–8.6 nmol/L; the study does not prove causation and does not advocate testosterone supplementation, but suggests testosterone could be a biomarker for overall health, with prostate cancer not showing a clear link in these data.
Six health issues linked to smaller testicles include testosterone suppression from TRT or anabolic steroids, testicular torsion (a medical emergency), varicocele causing increased scrotal temperature, infections such as orchitis, hypogonadism, and natural aging. Seek medical evaluation if shrinkage occurs with pain, swelling, a lump, or other new symptoms, typically via physical exam, ultrasound, and hormone tests.
US health officials are seeking label updates for testosterone replacement therapies after reviewing new safety data; although large studies found no meaningful rise in heart attacks or strokes among users, the proposed revisions would remove a blanket claim that safety and effectiveness aren’t established for age-related low testosterone and would update prostate cancer and enlarged-prostate warnings, with continued emphasis on proper diagnosis and ongoing monitoring; experts say the changes reflect evolving science and could improve access, but testosterone remains a medical therapy that should be prescribed only after thorough evaluation and not used indiscriminately; typical low testosterone is below about 300 ng/dL, though normal ranges vary by lab and guidelines.
A systematic review of five randomized trials suggests GLP-1 weight-loss medications (e.g., semaglutide, liraglutide) may improve testosterone, sperm quality, and reproductive hormones in obese men with low testosterone, largely in the context of weight loss; however, the evidence is limited and larger, targeted studies are needed.
A review of five trials suggests GLP-1 medications for diabetes/weight loss may raise testosterone and improve sperm quality in men with obesity-related low testosterone over 24 weeks, likely via weight loss and better metabolic health; larger studies are needed to confirm fertility benefits.