Magno Health

Sex Hormones

LH on TRT

What the number means, why it moves on a protocol, and what people usually do about it.

Updated 2026-09-27 · Part of the Magno guides

What it is

Luteinizing hormone is the brain telling the testes to make testosterone. On TRT it drops to near zero because the brain sees plenty of androgen and stops asking.

The range

TRT-aware target

Read against the lab range and the trend

How to read the lab range

Lab range roughly 1.7 to 8.6 IU/L. On TRT it reads under 1, which is expected, not a problem. Very high LH with low testosterone means the testes are not answering the signal.

Why it moves on a protocol

What people usually do · not a recommendation

How Magno reads it

Import the PDF or a photo of the report and Magno finds LH on it, keeps every test on one line, shows the change since the last one, and reads it against TRT-aware thresholds rather than the lab's generic range. The panel it belongs to, Sex Hormones, gets a written verdict with the probable causes and what people usually do.

Read yours

Drop your lab PDF or a photo and get every marker read like this, in plain words. Free, no account, nothing leaves your browser. Save it in the app to see the change since your last test.

Read my bloodsStart tracking

Questions people ask

Is LH near zero on TRT bad?

No. It is expected and reverses when testosterone stops, usually. HCG keeps the testes working in the meantime if that matters to you.

Can LH tell if I am recovered after a cycle?

Yes. LH and FSH back in range with a normal testosterone means the axis is running again.

Related markers

Not medical advice

This is how experienced TRT users read the number and what they usually do about it. Every decision about your protocol belongs to you and a clinician who knows you.