Low energy, poor sleep or low testosterone? How to tell what needs checking

By mid-afternoon, you are struggling to concentrate. Training feels harder than it used to, and your personal drive is not what it was. Could low testosterone be responsible? Possibly, but there are several other explanations worth considering before ordering a testosterone test.

Testosterone does more than support muscle growth

Testosterone contributes to sexual function, bone health, muscle maintenance and sperm production in men. Women produce testosterone too, though generally at much lower levels. Hormone levels vary with age, health, medication and the time of day.

A gradual fall in testosterone can occur as men get older. That does not mean every drop is a medical problem, or that tiredness in middle age is necessarily a sign of hormone deficiency. Symptoms and reliable measurements need to be considered together.

Which symptoms are more suggestive of a problem?

Reduced sexual desire, fewer spontaneous morning erections and erectile difficulties may prompt a clinician to investigate testosterone. Changes in muscle strength, mood and energy can also occur, but these are less specific.

If tiredness is your main complaint, look at the wider picture. Has your sleep deteriorated? Do you snore heavily or wake feeling unrefreshed? Have you been under sustained pressure at work? Have you started any medicines, lost or gained weight, or noticed other changes in your health?

Sleep apnoea, depression, thyroid problems and several chronic illnesses can affect energy and sexual wellbeing. Treating an underlying cause may be more useful than focusing on testosterone alone.

Why the timing of a blood test matters

For men with symptoms suggestive of testosterone deficiency, standard clinical assessment normally involves a morning blood test for total testosterone. Levels can fluctuate, so a low result generally needs to be repeated on another morning before a diagnosis is made. A clinician may arrange further blood tests to understand why the level is low.

Results also depend on the laboratory, reference ranges and relevant health conditions. A number shown as low on a report is not, by itself, a diagnosis. Equally, a normal result does not mean your symptoms should be ignored.

What about saliva testing at home?

Different tests answer different questions. GetTested, a specialist in at-home health tests, offers a Testosterone test that uses three saliva samples collected during the day to measure free testosterone. Samples are posted to a laboratory, and results are supplied online.

This may offer a way of exploring salivary hormone levels, but it is important not to confuse it with the blood testing recommended for diagnosing testosterone deficiency in men. Saliva results should not be used alone to decide whether testosterone replacement is needed. Seek advice from a qualified healthcare professional if symptoms continue.

Why starting testosterone isn’t a quick fix

Testosterone treatment can help some people with confirmed deficiency, but it is not a general remedy for fatigue, low motivation or ageing. Treatment requires assessment, discussion of possible risks and ongoing monitoring. It can also reduce sperm production, which matters if you are planning to have children.

Supplements promoted as testosterone boosters deserve particular caution. Claims about rapid increases in strength, energy or confidence are not a substitute for good evidence, and products may interact with medicines or contain unsuitable ingredients.

What to do before booking a test

Make a note of the symptoms bothering you most and when they began. Consider your sleep, workload, exercise, alcohol consumption and medication. If you are experiencing persistent erectile difficulties, significant fatigue or reduced libido, make an appointment with your GP rather than relying on a home result alone.

A testosterone test can contribute to a conversation about health, but it cannot replace a proper assessment. Finding the cause matters more than chasing a particular hormone number. Sometimes that will involve testosterone; often, it will mean looking at something else entirely.