In short
- The decline is real but small. Total testosterone falls about 0.4 percent a year across the forties to seventies.
- Free testosterone falls more. Men in their late seventies sit around 30 percent below men in their early forties.
- True deficiency is uncommon. In a study of 2966 men aged 40 to 79, only about 2 in 100 had low testosterone together with sexual symptoms.
- Weight matters more than age. Obesity lowers testosterone through a different mechanism and is far more common.
- The look alikes dominate. Sleep apnoea, depression, thyroid disease, alcohol and diabetes produce the same complaints.
Condition Overview
What actually changes with age
| Measure | What happens |
|---|---|
| Total testosterone | Falls roughly 0.4 percent per year in men aged 40 to 79 |
| Free testosterone | Falls further. Men aged 75 to 79 sit around 30 percent below men aged 40 to 44 |
| Sex hormone binding globulin | Rises gradually with age, so less of the total is biologically active |
| Daily rhythm | The morning peak flattens with age |
One large analysis of over 21,000 men found total testosterone and LH broadly stable until around age 70. So the picture is a slow drift, not a switch that flips at 45.
How common is genuine deficiency?
Much less common than the marketing suggests.
In the European Male Aging Study, 2966 men aged 40 to 79 were assessed. The combination of a low testosterone below 317 ng/dL together with three sexual symptoms was present in only 2.1 percent. More severe deficiency, below 230 ng/dL, was present in 0.9 percent.
Those men did differ measurably from the rest: lower haemoglobin, lower heel bone density, less muscle mass and poorer general health. Severe deficiency was also associated with insulin resistance and the metabolic syndrome.
So a low testosterone syndrome in middle aged and older men is real. It just applies to a small minority of the men who suspect it.
Why weight matters more than age here
Obesity lowers testosterone through two routes at once. It lowers sex hormone binding globulin, which drops the total reading, and it also suppresses the signal from the pituitary, which drops the free level too.
Unlike age, that is reversible. It is also far more common in the men who present with these symptoms.
What produces the identical picture
- Obstructive sleep apnoea and chronic short sleep.
- Depression and chronic stress.
- Thyroid disease, iron deficiency and anaemia.
- Poorly controlled diabetes.
- Alcohol, and long term opioids or high dose steroids.
Each has its own treatment, and each is more likely than andropause.
What the symptoms look like
- Suggestive of low testosterone: reduced libido, fewer morning erections, loss of body hair, small testes, low bone density.
- Common but non specific: low motivation, irritability, poor concentration, loss of muscle and strength, increased abdominal fat, unrefreshing sleep.
Almost every man who arrives with this question arrives with the second list.
When to See a Doctor
- Your libido and morning erections have declined steadily over the past few years rather than overnight.
- You have lost strength and gained weight around the middle despite training and eating much as before.
- Your mood, drive and tolerance for stress have changed in a way your family has noticed too.
- You snore heavily, wake unrefreshed or fall asleep during the day, which frequently sits behind these symptoms.
- You have persistent headaches, changes in your peripheral vision or milk discharge from the breast, which need pituitary assessment quickly.
- You have unexplained weight loss, night sweats, bone pain or urinary obstruction, which must be investigated before anything is attributed to age.
- You have persistent low mood, hopelessness or thoughts of harming yourself, which need urgent care rather than a hormone appointment.
How Dr. Felix Assesses This
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1
Symptom timeline
Dr. Felix maps the sequence and speed of the change across libido, erections, energy, mood, concentration, strength and sleep. A gradual decline over years and a sudden collapse over weeks point in very different directions, so the timing matters as much as the symptoms.
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2
Risk and medication review
Chronic illness, cardiovascular risk, alcohol intake, opioid or corticosteroid use, antidepressants, previous anabolic steroid use and family history are documented. Any earlier testosterone taken without supervision is discussed openly, since it changes both the interpretation and the plan.
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3
Examination and blood tests
Blood pressure, waist, body composition, breast tissue and testicular examination are performed, with prostate assessment where age appropriate. Morning blood tests are arranged and repeated on a separate morning if testosterone is low, alongside thyroid, prolactin, blood count, ferritin, HbA1c and lipids.
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4
Diagnosis and plan
Dr. Felix tells you what the results show and what they do not. You then agree an order of treatment, which might address sleep apnoea, weight, alcohol or a medication first, with hormone therapy considered only where deficiency is confirmed and other causes have been dealt with.
Treatment Options
Andropause Treatment
When testosterone treatment is on the table Only where there are symptoms of deficiency together with early morning testosterone below…
View Treatment
TRT Consultation
What this appointment is for Testosterone deficiency needs two things at once: symptoms consistent with it, and a genuinely low…
View Treatment
Men’s Hormone Optimization
Why one hormone is not enough Testosterone does not operate alone, and a single number rarely explains a man who…
View Treatment
Testosterone Replacement Therapy
Who this is actually for Adult men with symptoms and signs of androgen deficiency together with a subnormal morning testosterone…
View Treatment
Why Early Treatment Can Matter
Assessing this sooner rather than later mainly saves you years of adapting around symptoms that had a treatable cause. Sleep apnoea, thyroid disease, iron deficiency and early diabetes are all easier to manage when they are found before they have shaped your habits and your health.
There is also a practical advantage. Muscle mass and bone density are simpler to maintain than to rebuild, and blood pressure, lipids and glucose respond well while the numbers are still modest. A TRT consultation answers the hormone question properly at the same time.
Why Early Treatment Can Matter
Assessing this sooner rather than later mainly saves you years of adapting around symptoms that had a treatable cause. Sleep apnoea, thyroid disease, iron deficiency and early diabetes are all easier to manage when they are found before they have shaped your habits and your health.
There is also a practical advantage. Muscle mass and bone density are simpler to maintain than to rebuild, and blood pressure, lipids and glucose respond well while the numbers are still modest. A TRT consultation answers the hormone question properly at the same time.
Treatable causes found sooner
Apnoea, thyroid disease and iron deficiency respond well once identified.
Muscle, bone and metabolism
Strength and bone density are easier to preserve than to recover later.
One assessment, one answer
A single structured review replaces years of guessing at the cause.
Cost & Consultation Investment
Assessment is charged as consultation time with Dr. Felix, covering the history, examination, interpretation of your morning blood results and the written plan you take away. The laboratory bills its own tests, and any sleep study or prescription is separate. If treatment and scheduled review follow, they are arranged as a programme or membership rather than appointment by appointment. Current information is on the pricing page.
Frequently Asked Questions
A gradual decline in testosterone with age is real and measurable, around 0.4 percent per year in total testosterone, with free testosterone falling further. Whether it causes symptoms in a given man is the actual question, and in most it does not.
In a study of 2966 men aged 40 to 79, low testosterone combined with three sexual symptoms occurred in only 2.1 percent, and severe deficiency in 0.9 percent. It is far less common than the number of men who suspect it.
No. Menopause is a defined event with a complete loss of ovarian oestrogen production. The male decline is slow, partial, highly variable and far from universal.
Obesity lowers testosterone twice over: it reduces the binding protein, which lowers the total reading, and it suppresses the pituitary signal, which lowers the free level too. Unlike age, that is reversible.
Sleep apnoea, chronic short sleep, depression, thyroid disease, iron deficiency, poorly controlled diabetes, alcohol and long term opioids or steroids. All are more common than andropause and all produce the same complaints.
Sometimes, because binding globulin rises with age and falls with obesity. It must be measured by equilibrium dialysis. The analog assay most laboratories offer is inaccurate and misleading.
Benefit is more likely the lower the level, particularly below 200 ng/dL. Men in the borderline band get less from treatment while carrying the same risks, which is why the decision is individual.
No. Morning between 8 and 10, fasting, and repeated on a separate day. An afternoon sample after breakfast can read low in a man with entirely normal levels.
Sperm production does not change dramatically with age. In studies comparing older and younger men, semen characteristics were broadly similar, though motility tends to be somewhat better in younger men.
It depends on which tests are needed and how many repeat samples, so a single figure would be misleading. You get the full cost in the consultation before anything is arranged.
Evidence
Where this information comes from
Every figure on this page is taken from the sources below. All of them are free to read, so you can check them yourself.
This page is general medical information and does not replace a personal consultation. Trial results are averages across large groups, not a prediction for any one person.