Low testosterone in your 30s: reading the labs your GP might miss.
Total T, free T, SHBG, LH, prolactin. A plain language guide to the numbers that actually explain fatigue, mood dips and low drive.
Why total T alone is misleading
Most Indian labs report total testosterone as a single number. But testosterone circulates in three states, tightly bound to SHBG, loosely bound to albumin, and free. Only the free and loosely bound fractions are biologically active. Two men with identical total T can feel completely different depending on their SHBG.
The five numbers to actually order
For a symptomatic man in his 30s, we typically order total testosterone, free testosterone (calculated or direct), SHBG, LH, and prolactin. A basic metabolic panel and thyroid are usually added to rule out secondary causes.
What each result means
Total T tells you the pool. SHBG tells you how much is locked away. Free T tells you what is actually available to tissues. LH separates a testicular problem from a pituitary one, low T with low LH points upstream. Prolactin, when elevated, is a well known suppressor of testosterone and can indicate a treatable pituitary issue.
When treatment is warranted
Testosterone therapy is considered when a man has clear symptoms, low free testosterone confirmed on two morning draws, and no reversible cause. It is not a first move for a man whose sleep is broken, who is drinking daily, or whose weight and metabolic panel are the more obvious lever.
A note on TRT hype
The internet has turned testosterone into a lifestyle brand. In reality, it is a hormone with real benefits for the right patient and real trade offs, fertility suppression, hematocrit changes, need for monitoring, for the wrong one. A proper workup exists to tell those two men apart.
Next step
Talk to a doctor about this, privately.
A licensed Indian physician will review your case and, if appropriate, prescribe. Fully discreet.
Take an AssessmentFAQ
Frequently asked
Can I test testosterone at any time of day?+
No. Testosterone follows a strong daily rhythm, peaking in the morning. Blood should be drawn between roughly 7 and 10 am, fasted, and repeated on a separate day before any diagnosis is made.
Does testosterone therapy affect fertility?+
Yes. Exogenous testosterone typically suppresses natural sperm production. Men who wish to conceive should discuss alternative strategies with their physician before starting therapy.
How long does it take to feel a difference on therapy?+
Energy and mood often improve within 3 to 6 weeks. Libido and body composition changes typically appear over 3 to 6 months of well monitored therapy.
