Testosterone as a Barometer of Men’s Health: What a Low Level Actually Tells You

শেষ আপডেট: আগস্ট 29, 2026

• ওয়ার্ডপ্রেস
• লিঙ্কডইন
• মেইল

Male hormonal health is the part of my practice I trained for specifically: an Andrology Fellowship at Chang Gung Memorial Hospital Kaohsiung, Taiwan (2019), under Professor Po-Hui Chiang. More recently, as a Research Scholar and Clinical Observer at the Scott Department of Urology, Baylor College of Medicine, one idea kept coming up in clinic after clinic — testosterone is one of the most useful single readings of a man’s general health, and it is rarely read that way.

When men think about low testosterone, they usually think about the bedroom. Testosterone is a systemic hormone, though, and a low level often travels with problems in the heart, the metabolism and the bones. That is what makes it a useful barometer.

A barometer, though, tells you the pressure. It does not tell you what to do about the weather. This article has been revised twice — most recently on 29 August 2026, after checking every figure on it against current sources — because several claims in its earlier version have since been tested in large trials and did not hold. Where that has happened, it is said plainly below rather than quietly deleted.

Before Anything Else: What Should Not Wait

Low testosterone itself is not an emergency. Two things around it can be.

If a low testosterone level comes with new persistent headaches, a change in vision — particularly loss of the outer edges of your visual field — or milky discharge from the nipples, that points towards the pituitary gland rather than the testes and needs investigating rather than treating with testosterone.

If you are already on testosterone therapy, go to an emergency department the same day for chest pain, breathlessness at a level of exertion that never used to trouble you, pain or swelling in one calf, sharp chest pain worse on breathing in, a racing or irregular heartbeat, or any stroke symptom even if it resolves within minutes. In Thailand, call 1669.

The Earliest Signs Are Sexual

Sexual symptoms are the most specific indicators that testosterone has genuinely fallen — more specific than fatigue or mood, which have many commoner causes.

• Desire and morning erections. A definite drop in sexual thoughts and in the frequency of spontaneous morning erections is usually the first thing men notice.
• Erectile dysfunction. ইরেক্টাইল ডিসফাংশন can accompany low testosterone, but most erectile dysfunction is a blood-vessel problem rather than a hormonal one. That is why correcting a hormone often improves desire far more than it improves erections, and why ED deserves a cardiovascular assessment in its own right — the subject of ED as the heart’s early warning system.
• Peyronie’s disease. Low testosterone has been reported alongside পেরোনি রোগ in observational studies. The earlier version of this article called that a strong link; the evidence is in fact inconsistent — a systematic review of six studies found five supporting an association and one finding none, and later studies still conflict. More to the point for anyone considering treatment: a multicentre analysis found that men with testosterone deficiency responded less well to collagenase injections, and that giving testosterone did not change that outcome. There is no established evidence that treating the testosterone alters the curvature.

The point about fertility that is easy to read backwards

Low testosterone and impaired sperm production often occur together, because the same axis drives both. It does not follow that testosterone therapy is a fertility treatment. The opposite is true: testosterone given from outside switches off the body’s own signal to the testes, and sperm production falls with it, frequently to zero.

This is the single most important thing to raise before a first dose rather than after it. Recovery after stopping usually takes months and sometimes a couple of years, and it is not guaranteed. Where fertility matters, clomiphene citrate, hCG or an aromatase inhibitor can raise testosterone while preserving sperm production — and hCG only works if the testes can still respond, which is why LH and FSH are measured at the start.

Mood and Concentration

Low mood, poor concentration and chronic fatigue are common in men with low testosterone. What has changed is how confidently that can be turned into a treatment claim.

The earlier version of this article said testosterone therapy significantly improves mood and relieves depressive symptoms. The honest position is narrower: in men with a genuine deficiency, some report improvement in mood alongside the sexual benefits, but testosterone is not a treatment for depression and should not be used as one. Depression deserves assessment and treatment in its own right, and it can be the cause of the fatigue and low libido rather than the consequence. If low mood is a significant part of what you are experiencing, please see a doctor or a mental health professional about it directly, and never stop an antidepressant because a hormone result came back low. The evidence behind the mood question is discussed in testosterone therapy and depression.

Heart, Weight and Metabolism

This is where the barometer idea earns its keep.

• Cardiovascular disease. Low testosterone is associated with a higher cardiovascular risk, and the American Urological Association advises that men be told so. Note what that statement is and is not: it identifies a man who should have his blood pressure, lipids, weight and blood sugar looked at properly. It does not say that raising the testosterone lowers the cardiovascular risk.
• The weight cycle. Fat tissue converts testosterone to oestrogen, which lowers testosterone further and makes weight harder to lose — a genuine self-reinforcing loop. The causal evidence that excess weight lowers testosterone is reasonably strong and is examined in why your doctor recommends the gym before the pharmacy.
• Diabetes — corrected. Low testosterone is associated with type 2 diabetes. The earlier version of this article went further and said that treating low testosterone helps prevent men with prediabetes from progressing to diabetes. Smaller studies had suggested that, but the prespecified TRAVERSE diabetes substudy found no significant difference in progression, and no difference in glucose or HbA1c. The American Diabetes Association does not recommend testosterone for diabetes prevention. Testosterone is not a treatment for diabetes and is not a substitute for weight loss.

Bones — Corrected, and More Strongly Than Before

Osteoporosis is thought of as a woman’s disease, and men with low testosterone do have lower bone density and a higher fracture risk. That part stands, although the specific percentages quoted in the earlier version were not sourced and have been removed.

What has changed is the treatment implication, and the correction is firmer than this page first stated it. Testosterone does improve bone mineral density on a scan, which led to a widespread assumption that it therefore prevents fractures. The TRAVERSE fracture subtrial found a statistically significant increase of roughly 43% in clinical fractures on testosterone — around 3.5% of men versus 2.5% on placebo — with the curves separating within the first few months and ribs, wrist and ankle the commonest sites.

An intermediate version of this page described that as slightly more fractures. That undersold a significant finding, and it has been corrected. Bone density and broken bones turned out not to be the same endpoint. Testosterone should not be prescribed to protect bone, and a man with osteoporosis needs assessment and treatment aimed at bone specifically.

The Prostate: What This Article Previously Got Wrong

The earlier version ended by saying that low testosterone is linked to an increased risk of developing prostate cancer. That was stated far more firmly than the evidence allows, and it is removed.

The honest position is this. The old belief that testosterone fuels prostate cancer is not supported by modern evidence, which is the basis of the saturation model. Some older observational series reported that men found to have prostate cancer at a low testosterone level tended to have higher-grade disease — but that is an inconsistent observational association, not established causation, and it is certainly not a reason to take testosterone. Nor does the evidence point the other way: a randomised prostate-safety analysis found no increase in prostate cancer with testosterone therapy, and a large 2025 cohort of older men actually found a lower rate of prostate cancer among those treated. Prostate assessment and a PSA before starting therapy remain standard, and screening remains a shared decision, discussed in the PSA screening article.

The Most Powerful Lever Is Still Weight

For men whose testosterone is suppressed by weight and metabolic disease rather than by damage to the reproductive axis, losing weight raises testosterone measurably — and unlike a prescription, it also improves the blood pressure, the blood sugar and the sleep apnoea that were part of the picture in the first place.

The size of the effect is now reasonably well described, and it is dose-dependent on how much weight is lost. Losing at least 5% to 10% of body weight raises testosterone, often back into the normal range. Pooled data put the average rise at around 70 ng/dL after dietary weight loss, and around 200 ng/dL after bariatric surgery — a difference that reflects the difference in weight lost rather than anything special about the operation.

An intermediate version of this page removed a figure of this kind for being unsourced and replaced it with a vague description. That was the wrong correction: the original number was in the right region, and hedging a real effect into vagueness does a reader no favours. The figures above are sourced.

This is why health optimisation, not the prescription pad, is the first-line management of functional testosterone deficiency.

Reading the Barometer Without Over-Reading It

If you are over 40 and experiencing a genuine drop in sexual desire, loss of morning erections, fatigue or central weight gain, having testosterone measured as part of a proper health screening is sensible — alongside blood pressure, lipids, blood sugar, weight and a conversation about PSA.

Two cautions go with that. First, the test has to be done correctly: a morning fasting sample, repeated on a separate day, not taken during or just after an illness, with LH and FSH alongside it. Second, a low number is a finding, not a diagnosis and not a prescription. In many men the right response is to treat what suppressed it. Both points are set out in low testosterone: what the evidence actually supports, and the fuller assessment pathway is described on the testosterone evaluation and treatment page.

Appointments. Consultations are arranged through the hospitals: ব্যাংকক হসপিটাল সদর দপ্তর, or Samitivej Sriracha Hospital in Chonburi on 088-022-1445.

ব্যাংকক হসপিটাল টেলিমেডিসিন এমন রোগীদের জন্য উপলব্ধ যারা সশরীরে উপস্থিত হতে পারেন না, যার মধ্যে আন্তর্জাতিক রোগীরাও অন্তর্ভুক্ত — ইউরোলজি বিভাগে ইমেলের মাধ্যমে এটি অগ্রিম ব্যবস্থা করুন bhquro@bdms.co.th. Samitivej Sriracha is in-person only. Enquiries about cost are answered by the hospital rather than through this website; please email the same address.

প্রায়শই জিজ্ঞাসিত প্রশ্ন

কম টেস্টোস্টেরনের প্রথম লক্ষণগুলি কী কী?

The earliest and most specific signs are sexual — a definite drop in sexual desire and in the frequency of spontaneous morning erections, sometimes with erectile dysfunction. Fatigue, mood change and central weight gain can accompany it, but each of those has commoner causes than testosterone, so they are not enough on their own.

Does low testosterone affect heart health?

Low testosterone is associated with higher cardiovascular risk, and the American Urological Association advises that men be told so. That makes it a reason to have blood pressure, lipids, weight and blood sugar assessed properly. It does not mean that raising the testosterone lowers the cardiovascular risk, which has not been shown.

Will testosterone therapy help me father a child?

No — it does the opposite. Testosterone given from outside suppresses the body’s own signal to the testes and sperm production falls with it, frequently to zero. Recovery after stopping takes months to a couple of years and is not guaranteed. If you may want children, say so before the first dose; clomiphene citrate, hCG or an aromatase inhibitor can raise testosterone while preserving sperm production.

Does testosterone therapy prevent diabetes or protect the bones?

Neither claim survived testing, and the bone finding went the other way. The prespecified TRAVERSE diabetes substudy found no significant difference in progression from prediabetes to diabetes, and the American Diabetes Association does not recommend testosterone for that purpose. The TRAVERSE fracture subtrial found a statistically significant increase of about 43% in clinical fractures on treatment, despite testosterone improving bone density on a scan. Testosterone should not be prescribed for either purpose.

How much does losing weight raise testosterone?

Enough to matter, and in proportion to the weight lost. Losing at least 5% to 10% of body weight raises testosterone, often back into the normal range. Pooled data put the average rise at around 70 ng/dL after dietary weight loss and around 200 ng/dL after bariatric surgery. This works where the deficiency is driven by weight and metabolic disease rather than by damage to the reproductive axis, and it improves blood pressure, blood sugar and sleep apnoea at the same time.

At what age should men have testosterone checked?

Testing is worthwhile from around 40 when there are symptoms — particularly sexual symptoms — or metabolic risk factors, as part of a full screening rather than in isolation. Testing a man with no symptoms on the strength of his age alone is not recommended, because a number without symptoms is not a condition to treat.

When should I seek urgent medical attention?

Low testosterone with new headaches, loss of peripheral vision or milky nipple discharge points to the pituitary and needs assessment promptly. If you are already on testosterone therapy, go to an emergency department the same day for chest pain, breathlessness on reduced exertion, pain or swelling in one calf, sharp chest pain worse on breathing in, a racing or irregular heartbeat, or any stroke symptom even if it resolves. In Thailand, call 1669.

তথ্যসূত্র

• Snyder PJ, Bauer DC, Ellenberg SS, et al. Testosterone treatment and fractures in men with hypogonadism. N Engl J Med. 2024;390(3):203–211.
• Bhasin S, Lincoff AM, Nissen SE, et al. Effect of testosterone on progression from prediabetes to diabetes in men with hypogonadism: a substudy of the TRAVERSE randomized clinical trial. JAMA Intern Med. 2024;184(4):353–362.
• Bhasin S, Travison TG, Pencina KM, et al. Prostate safety events during testosterone replacement therapy in men with hypogonadism: a randomized clinical trial. JAMA Netw Open. 2023;6(12):e2348692.
• Anawalt BD, O’Connor KM, Grossmann M. Adult male hypogonadism. জামা. 2026.
• Aditya I, Grober ED, Krakowsky Y. Peyronie’s disease and testosterone deficiency: is there a link? World J Urol. 2019;37(6):1035–1041.

দাবি পরিত্যাগ This content is written and reviewed by Dr. Soarawee Weerasopone, a board-certified urologist at Bangkok Hospital Headquarters. It is intended for general education only and does not constitute medical advice, diagnosis or treatment for any individual. No advice, diagnosis or prescription is given through personal messaging channels or social media, and Dr. Soarawee operates no public social media account. Always consult a qualified doctor about your own symptoms. In an emergency in Thailand, call 1669.