Men’s bone density becomes a vital health concern with age. Research shows that testosterone bone density men relationships are critical, with one in five men over 50 suffering fractures due to osteoporosis. Although osteoporosis is often seen as a women’s condition, declining testosterone means it is set to become a major public health challenge for men worldwide over the next 20 years.
Testosterone levels drop during andropause and this affects bone density substantially . The condition rarely shows symptoms until a fracture happens, which is why doctors call it the 'silent disease' . The risk stays low for men under 70, but jumps to 22.6% in men over 90 years old .
Male ageing and bone health depend on a complex mix of hormones, especially testosterone and oestrogen. Research points to a clear link between better bone mineral density and higher serum estradiol levels in men's skeletal sites after age 65 . This piece explores the vital connection between andropause and bone density. It also offers real-life strategies to prevent osteoporosis and keep bones healthy as men age.
Why Osteoporosis in Men Is Often Missed: Testosterone and Bone Density
Image Source: boroondaraosteopathy.com
Men face serious risks from osteoporosis, yet healthcare systems fail to diagnose and treat them properly. The reasons behind this reveal systemic problems that leave men at risk of preventable fractures.
Lack of awareness among men and clinicians
Most people see osteoporosis as a women's health issue, which creates a major knowledge gap. This wrong idea exists among patients and healthcare providers alike. A national survey shows that while 90% of doctors would check a 65-year-old postmenopausal woman for osteoporosis, only 22% would do the same for a 74-year-old man with no major health issues [1].
Medical specialists also lack proper knowledge. The numbers tell us that 78.9% of endocrinologists, 53.1% of geriatricians, and just 33.6% of primary care physicians have read at least one osteoporosis screening guideline [1]. This knowledge gap leads to poor prevention strategies for men who experience testosterone-related bone density decline.
Many doctors simply don't think men can get osteoporosis [1]. This creates a dangerous pattern - without proper screening, bone loss goes undetected until a fracture occurs.
Diagnostic bias towards postmenopausal women
The numbers reveal clear gender bias in detecting osteoporosis. DXA screening rates reach only 6% in men compared to over 94% in women above 65 [2]. This gap exists even when men show clear risk factors that should trigger testing.
Several things cause this bias. Drug companies target their ads at women, and men rarely appear in osteoporosis medication commercials [3]. The diagnostic tools themselves show this bias - experts developed most guidelines, screening protocols, and fracture risk prediction methods for women first, then adapted them for men [2].
Men who have already broken bones face even worse odds. Research shows doctors test men less often than women for osteoporosis after a fracture [2]. One study of patients over 65 with hip fractures found only 5.4% of men got DXA scans versus 12.1% of women [2]. Another study looking at patients with atraumatic hip fractures showed only 11% of men had DXA within five years before the fracture, compared to 27% of women [2].
Men who lose bone mass during andropause often go undiagnosed as a result.
Fracture risk in men over 60
The fracture risk for ageing men remains high despite lower detection rates. One in four men over 50 will break a bone due to osteoporosis [4]. Older men face a higher risk of osteoporosis-related fractures than developing prostate cancer [5].
Age increases these risks substantially. A 50-year-old man has a 13% lifetime risk of at least one fragility fracture, which jumps to 25% by age 80 [6]. Men make up about 30% of all hip fractures - a higher percentage than most people realise [6].
The aftermath of these fractures brings even worse news. Men typically have poorer outcomes than women after fractures. They face more complications and higher death rates from osteoporotic fractures [2]. During the first six months after a hip fracture, men die at twice the rate of women of similar age [7].
These high risks exist even though men start with larger, stronger bones. The explanation lies in how men with low testosterone have decreased calcium absorption. Natural bone loss starts later in men than women but speeds up much faster once it begins [2].
Men who experience testosterone-related muscle loss face an even riskier situation. Weak bones combined with muscle loss create perfect conditions for fractures and complications.
How Testosterone Maintains Bone Density
The way testosterone and skeletal health work together tells us a lot about men's bone health as they age. Testosterone works differently from other hormones. It affects bones both directly and indirectly, which creates a complex system that keeps bones strong.
Testosterone's role in osteoblast activity
Testosterone controls bone metabolism through several cellular pathways. We learned that it activates osteoblasts—special cells that build new bone tissue [2]. These bone-forming cells have androgen receptors (ARs) that let testosterone change how they work [4]. When these receptors turn on, they start processes that help create, organise, and strengthen bone material [5].
Lab tests showed that testosterone helps osteoblasts grow and multiply while keeping them from dying off too early [4]. This hormone also gets more growth factors that bones need to develop:
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It produces more insulin-like growth factor-1 (IGF-1), which helps cartilage and bone cells multiply [8]
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It turns on transforming growth factor-β (TGF-β), which helps bone cells develop better [8]
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It blocks interleukin-6 (IL-6), which would otherwise break down bone tissue [8]
Studies that removed androgen receptors from osteoblasts proved these cells respond most to testosterone's bone-protecting effects [9]. The effects vary by bone type. Testosterone's signals through ARs in osteoblasts are vital for spongy bone formation but barely affect dense outer bone [2].
What happens when testosterone drops during andropause
Men's testosterone levels start dropping around age 40, during andropause—also called "male menopause" [2]. Men lose testosterone much slower than women lose oestrogen during menopause [2]. The damage to bones can be extensive.
Lower testosterone during andropause changes bone metabolism. Bone-forming cells become less active, so they don't make enough new bone [2]. Without enough testosterone, osteoblasts produce more RANKL (receptor activator of nuclear factor kappa-B ligand), which speeds up bone breakdown [8].
Bones break down faster than they rebuild. Studies show that men with low testosterone have twice the rate of osteoporosis (12.3%) compared to men with normal levels (6.0%) [8]. Young adult men with moderate to severe testosterone deficiency face the highest risk [8].
Fracture risk and low testosterone levels
Low testosterone levels relate closely to fracture risk. The osteoporotic fractures in men study (MrOS) tracked thousands of men over 65 across many countries. It found that men with less free testosterone broke bones more often [2]. Men who had more testosterone but less sex hormone-binding globulin (SHBG) broke fewer bones (OR: 0.87) than those with less testosterone and more SHBG [10].
Low testosterone makes bones weaker in other ways too. It reduces calcium absorption and muscle mass. Older men with low testosterone fall more often [2], which creates a dangerous mix of weak bones and frequent falls.
Recent clinical trials show mixed results about testosterone replacement therapy (TRT) for preventing fractures. The Testosterone Trials showed that treatment improved spine bone density by 7.5% versus 0.8% with placebo [11]. It also made spine bones 10.8% stronger compared to 2.4% with placebo [11].
A newer study, published by TRAVERSE, showed that testosterone treatment didn't prevent fractures much, even though it made bones denser [10]. Doctors still prefer other bone-protecting treatments as the first choice for men with osteoporosis [5].
The Hidden Role of Oestrogen in Male Bone Health
Image Source: Nature
Scientists spent decades studying only testosterone's direct effects on male bone health. Research has revealed something unexpected—oestrogen, a hormone we typically associate with women, plays a crucial role in men's skeletal health.
Aromatase conversion of testosterone to oestrogen
The male body uses a specific enzyme called aromatase (CYP19A1) to convert testosterone into estradiol, which is the main form of oestrogen. This process takes place in bone, brain, liver, and adipose tissue. Extraglandular aromatization of circulating androgen precursors serves as men's primary source of oestrogen [7].
Aromatase, a member of the cytochrome P450 family, shows a remarkably high affinity to androgens compared to other steroid hydroxylases [6]. The enzyme turns androgens into estrogens through demethylation [6]. The process specifically changes testosterone into estradiol and androstenedione into estrone.
Men going through andropause show an increase in their estradiol-to-testosterone ratio—which indicates aromatase activity [7]. Research shows this ratio runs higher in men with normal bone density than those who have osteoporosis or fragility fractures [7]. This suggests the conversion process becomes more vital as men age.
Oestrogen's effect on bone resorption
Research has revealed something remarkable—oestrogen, not testosterone, mainly regulates bone resorption in men. A groundbreaking study proved this by removing endogenous testosterone and oestrogen production in elderly men (mean age 68 years), then adding back each hormone separately [12]. The results showed oestrogen prevented increased bone resorption markers, while testosterone had little effect [12].
Oestrogen affects bone homeostasis in men through several mechanisms:
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Enhances FAS/FASL interaction, stimulating osteoblasts to produce TGF-β which promotes apoptosis of bone-resorbing osteoclasts [6]
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Reduces RANK-L-induced differentiation by decreasing RANK-L and M-CSF expression [6]
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Diminishes pro-inflammatory cytokine-mediated differentiation of monocytes to osteoclasts [6]
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Decreases osteoclast activity by reducing Cathepsin K and MMP13 expression [6]
Studies show estradiol, especially its bioavailable fraction, relates better to bone mineral density than testosterone in older men [12]. More research confirms bioavailable oestrogen shows stronger links than testosterone to both BMD gains in young men and BMD loss in elderly men [12].
Evidence from aromatase deficiency studies
The strongest proof of oestrogen's vital role comes from rare cases where men cannot convert testosterone to oestrogen due to aromatase deficiency. These natural cases prove oestrogen's essential role in male skeletal health [13].
Men with aromatase deficiency show several skeletal issues:
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Markedly low bone mineral density [7]
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Unfused epiphyses and continued linear growth beyond normal age [12]
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Elevated indices of bone turnover [12]
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Tall stature and eunuchoid skeletal proportions [7]
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Genu valgum (knock knees) [7]
The treatment results tell the real story. Oestrogen replacement therapy helped these men dramatically—their epiphyses closed quickly, growth stopped, and their BMD improved at all skeletal sites [7]. Testosterone therapy alone couldn't achieve these results [1].
These findings match data from the large Osteoporotic Fracture in Older Men Study (MrOS). Men with low bioavailable estradiol (<11.4 pg/ml) faced higher risks of non-spine fracture [3]. No such link existed between bioavailable testosterone and fracture risk [3].
The research suggests a threshold effect—men need enough oestrogen (about 40-55 pmol/litre for bioavailable estradiol) to maintain normal skeletal remodelling [7]. Below this level, the risk of bone loss and fracture risk with low testosterone rises sharply.
Identifying and Diagnosing Bone Loss in Men
Image Source: echelon.health
Bone loss detection plays a crucial role in men's health, yet many overlook this aspect as testosterone levels drop during andropause. Most men discover they have osteoporosis only after breaking a bone, unlike postmenopausal women who benefit from regular screening protocols.
At the time to think about a DEXA scan
Dual-energy X-ray absorptiometry (DEXA or DXA) stands as the gold standard to measure bone mineral density (BMD) and diagnose osteoporosis. This test involves minimal radiation and causes no pain. The core focus lies on the hip and spine—areas that face the highest risk of osteoporotic fractures [14].
Medical organisations have different views on male screening. The International Society for Clinical Densitometry and National Osteoporosis Foundation suggest BMD testing for:
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Men aged 50-69 years with risk factors [15]
These risk factors signal the need for early screening:
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Breaking bones from minor trauma [11]
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Getting shorter or changes in posture [16]
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Using corticosteroids over long periods [11]
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Medical conditions that lower testosterone [16]
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Osteoporosis running in the family [17]
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Body mass index falling below 20 kg/m² [17]
The UK National Health Service believes any man over 50 with risk factors needs bone health assessment. This extends to all men by age 75 [8]. The US Preventive Services Task Force sees "insufficient evidence" to support routine screening in men [5]. This highlights the ongoing debate about the best detection methods.
Z-score vs T-score in male diagnosis
Doctors use the T-score as their main diagnostic tool for men over 50. This score shows how bone density compares to a healthy young adult's bones [11]. Here's what the numbers mean:
|
T-score |
Diagnosis |
Description |
|
Above -1 |
Normal |
Bone density within normal range |
|
-1 to -2.5 |
Osteopenia |
Lower than normal bone density |
|
-2.5 or below |
Osteoporosis |
Substantially reduced bone density [18] |
Men under 50 benefit more from the Z-score, which compares their bone density to others their age [5]. Young men might receive an osteoporosis diagnosis with a Z-score of -2.0 or lower, plus major risk factors or a fragility fracture [15].
It's worth mentioning that organisations differ on using sex-specific reference databases. The factual keypoints show "many institutions may use a sex-specific reference database" [15], and clinical practise tends to favour this approach.
UK osteoporosis guidelines for men
UK guidelines offer a well-laid-out approach to assess male osteoporosis. The National Institute for Health and Care Excellence (NICE) recommends fracture risk assessment tools—QFracture (their preferred choice) or FRAX—to calculate 10-year fracture probability [8].
Risk levels fall into low, intermediate, or high categories. Men scoring above 10% on QFracture usually need a DEXA scan [8]. Some men, especially those with vertebral fractures, might start treatment without getting a DEXA scan [8].
The UK guidelines suggest:
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Assessment for all men 75 years and older
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Checking men 50 and over who show risk factors
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Quick assessment for any man over 50 who suffers a fragility fracture [8]
Finding bone loss early through proper screening helps preserve testosterone bone density in men. A combination of vitamin D and magnesium supplements, plus ways to prevent testosterone-related muscle loss, can help reduce fracture risk in men going through andropause.
Treatment Options: Hormones, Bisphosphonates and Beyond
Men experiencing andropause have several evidence-based treatments to address bone loss and prevent fractures. Each option provides distinct advantages based on bone density decline severity and individual health factors.
Testosterone replacement therapy outcomes
Research shows that testosterone treatment for 1 year in older hypogonadal men substantially increases volumetric bone mineral density (vBMD) and estimated bone strength [19]. Testosterone therapy boosted spine trabecular vBMD by 7.5% compared to just 0.8% with placebo in clinical studies [19]. The therapy improved estimated spine trabecular bone strength by 10.8% versus 2.4% with placebo [19].
Men with low original BMD see the biggest improvements during the first year of treatment [20]. Hypogonadal men maintain normal age-dependent bone density ranges with long-term testosterone replacement [20].
The largest longitudinal study TRAVERSE found no increase in cardiovascular events or prostate cancer risk with testosterone replacement [21]. The study noted more fractures in men receiving testosterone, mostly ancle and wrist injuries right after starting treatment [21]. Behavioural changes, rather than bone quality problems, might explain these early fractures.
Bisphosphonates and fracture prevention
Bisphosphonates are the life-blood of osteoporosis treatment. These medications slow bone breakdown while maintaining density [2]. They work remarkably well, reducing spinal fracture risk by nearly two-thirds and cutting non-spinal fractures in half [22]. Common prescription options include:
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Alendronate (Fosamax)
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Risedronate (Actonel)
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Ibandronate
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Zoledronic acid (Reclast)
Doctors prescribe oral bisphosphonates (alendronate or risedronate) as first-line treatments for men with high fracture risk [23]. These medications take 6-12 months to work and patients may need them for 5+ years [2]. Side effects can include food pipe irritation, swallowing problems, and stomach pain. Osteonecrosis of the jaw remains a rare but serious complication [2].
Combination therapy considerations
Men with severe osteoporosis may benefit from certain combination treatments. Research supports only three combination approaches: teriparatide with denosumab, teriparatide with zoledronic acid, and alendronate with raloxifene [24].
The teriparatide-denosumab combination boosts BMD more at both lumbar spine and hip compared to single medication use [24]. Adding teriparatide to zoledronic acid improves lumbar spine BMD better than zoledronic acid alone, while hip BMD sees better results than with just teriparatide [24]. This combination also reduces clinical fracture risk more than using zoledronic acid by itself [24].
Doctors still debate combination therapy's merits. However, men with severe osteoporosis and substantial testosterone deficiency might benefit from these aggressive approaches.
Lifestyle and Nutritional Strategies for Prevention
Image Source: researchgate.net
Lifestyle changes and smart nutrition choices can make a big difference in bone health during andropause. These preventive steps are vital to maintain testosterone bone density in men.
Calcium and vitamin D synergy
Calcium and vitamin D work together as the building blocks of bone health. Adults need 700mg of calcium daily [10] to keep their bones strong. Your body also needs vitamin D (10 micrograms/400 IU daily) because it helps absorb calcium in the intestines [10]. Your body can't use calcium properly without enough vitamin D, which might lead to osteomalacia in adults [25].
Men who experience dropping testosterone levels should focus on these nutrient sources:
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Calcium: dairy products, leafy greens, fortified cereals
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Vitamin D: oily fish, egg yolks, fortified foods [10]
Vitamin K2 and magnesium roles
Vitamin K2 boosts bone health by improving gamma-carboxylation of osteocalcin that binds calcium to bone hydroxyapatite [26]. Research shows that VitK2 supplements might make bones stronger and lower fracture risk in osteoporotic patients [27].
Magnesium plays a vital role in skeletal health, with about 60% stored in bone tissue [28]. It makes bones stiffer and helps osteoblast activity directly while supporting vitamin D metabolism indirectly [28]. Research links low magnesium levels to decreased hip bone density [28].
Weight-bearing exercise and fall prevention
Your bones get stronger when you do regular weight-bearing exercise. This happens because exercise puts stress on bones and encourages calcium deposits while activating bone-forming cells [9]. Men over 60 typically lose about 1% of bone strength each year [9], which makes exercise especially important.
Activities that strengthen bones include:
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Walking or jogging (impacts lower body bones)
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Strength training (benefits nearly all bones, especially hip and spine) [9]
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Balance training (reduces fall risk by about 47%) [4]
Boron and other trace minerals
Boron affects both testosterone and bone metabolism, though it's not officially an essential mineral [29]. It helps vitamin D and oestrogen last longer in your body while helping calcium work better [30]. Taking 3mg of boron daily helps bone health by improving how vitamin D works in your body [31].
Men with low vitamin D levels saw a 39% increase in 25(OH)D3 when they took boron supplements [32]. This helps maintain testosterone bone density in men going through andropause.
Conclusion
Bone health often gets overlooked as men age. Looking at andropause and osteoporosis shows how lower testosterone levels affect bone strength. You need early detection through proper screening to protect testosterone bone density in men.
Many people wrongly believe osteoporosis only affects women. This belief stops men from getting the right diagnosis and treatment. One in four men above 50 will have an osteoporotic fracture. Men who break their hips have a higher death rate than women. Medical specialists and patients need better awareness to tackle this "silent disease."
Research shows both testosterone and oestrogen help keep men's bones healthy. Here's something surprising - oestrogen made from testosterone by the aromatase enzyme actually controls bone loss in men more than anything else. This shows how complex hormones are during andropause.
Men who have low testosterone should get their bone health checked fully. This becomes vital after 70 or earlier if risk factors exist. Doctors can prescribe testosterone replacement therapy and bisphosphonates to help with bone loss. A healthy lifestyle also helps prevent age-related bone problems.
Good nutrition builds strong bones. Your body needs enough vitamin D to absorb calcium properly. Magnesium helps vitamin D work better and helps form new bone. Weight-bearing exercises make bones stronger and help prevent testosterone-related muscle loss.
Male osteoporosis is a big health issue that will grow as people live longer. Men shouldn't wait for broken bones before taking action. They should protect their bone health during andropause. With the right awareness, screening, and treatment, men can keep their bones strong as they age and stay independent with a good quality of life.
Key Takeaways
Understanding the connection between andropause and bone health empowers men to take proactive steps in preventing osteoporosis and maintaining skeletal strength throughout ageing.
• One in four men over 50 will experience an osteoporotic fracture, yet only 6% receive bone density screening compared to 94% of women over 65.
• Oestrogen, not just testosterone, is crucial for male bone health - it's the dominant regulator of bone breakdown in men and requires adequate levels for skeletal protection.
• Men aged 70+ should receive routine bone density screening, with earlier testing recommended for those with risk factors like low testosterone or previous fractures.
• Testosterone replacement therapy increases bone density by 7.5% in the spine, though bisphosphonates remain first-line treatment for established osteoporosis prevention.
• Calcium (700mg daily) plus vitamin D (400 IU) form the foundation of bone health, whilst weight-bearing exercise and magnesium support optimal bone formation.
The key to preventing male osteoporosis lies in early detection through proper screening, combined with targeted treatments and lifestyle modifications that address the hormonal changes occurring during andropause.
FAQs
Q1. At what age should men start getting screened for osteoporosis? Men should generally start getting screened for osteoporosis at age 70. However, earlier screening from age 50 is recommended for those with risk factors like low testosterone levels, previous fractures, or long-term corticosteroid use.
Q2. How does testosterone affect bone health in men? Testosterone plays a crucial role in maintaining bone density by stimulating bone-forming cells called osteoblasts. As testosterone levels decline during andropause, it can lead to decreased bone formation and increased risk of osteoporosis.
Q3. Can lifestyle changes help prevent osteoporosis in men? Yes, lifestyle changes can significantly help prevent osteoporosis. Regular weight-bearing exercise, adequate calcium and vitamin D intake, and avoiding smoking and excessive alcohol consumption can all contribute to maintaining bone health as men age.
Q4. What are the most effective treatments for male osteoporosis? The most effective treatments for male osteoporosis include bisphosphonates, which slow bone breakdown, and in some cases, testosterone replacement therapy. These medical interventions, combined with lifestyle changes and proper nutrition, can help manage the condition.
Q5. Is osteoporosis in men as common as in women? While osteoporosis is more commonly associated with women, it's a significant health concern for men too. Approximately one in four men over 50 will experience an osteoporotic fracture, highlighting the importance of awareness and prevention strategies for male bone health.
References
[1] - https://onlinelibrary.wiley.com/doi/full/10.1359/jbmr.2000.15.3.507
[2] - https://www.nhs.uk/conditions/osteoporosis/treatment/
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[5] - https://www.niams.nih.gov/health-topics/osteoporosis-men
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[12] - https://pubmed.ncbi.nlm.nih.gov/11730247/
[13] - https://www.jci.org/articles/view/10942
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[15] - https://www.ncbi.nlm.nih.gov/books/NBK538531/
[16] - https://www.mayoclinic.org/diseases-conditions/osteoporosis/diagnosis-treatment/drc-20351974
[17] - https://bestpractice.bmj.com/topics/en-gb/85
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[19] - https://pmc.ncbi.nlm.nih.gov/articles/PMC5433755/
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[23] - https://www.osteoporosis.foundation/news/new-evidence-based-guideline-management-osteoporosis-men-20240325-1145
[24] - https://academic.oup.com/jbmrplus/article/9/12/ziaf165/8296965
[25] - https://www.niams.nih.gov/health-topics/calcium-and-vitamin-d-important-bone-health
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[29] - https://ods.od.nih.gov/factsheets/Boron-HealthProfessional/
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