Magno
Blood Count
Hematocrit on TRT
What the number means, why it moves on a protocol, and how it sits with related markers.
What it is
Hematocrit is the share of the blood that is red cells. Testosterone drives red-cell production, so it is the number that climbs on TRT and the one doctors watch most closely.
The range
How to read the lab range
Lab range about 40 to 50 percent. The Endocrine Society 2018 testosterone guideline treats a hematocrit above 54 percent as a reason to stop or adjust therapy; lower lines, such as 52 percent, are also commonly quoted.
Why it moves on a protocol
- Dose and ester: bigger peaks push more red cells.
- Dehydration on the draw day reads as a higher hematocrit.
- Sleep apnea, smoking and altitude add to it.
- Draws near the injection peak read higher than trough.
How Magno reads it
Magno keeps every test on one line, against your lab's range, with the change since last time. Pro explains it in plain words. Get Magno for iPhone.
Read yours
Drop your lab PDF or a photo and get every marker explained in plain words. Free, no account, your file never leaves your browser. Track it in the iPhone app to see the change since your last test.
Questions people ask
What hematocrit is too high on TRT?
The Endocrine Society 2018 guideline uses above 54 percent as a reason to stop or adjust therapy. Some clinicians act lower. Where your line sits is a decision for you and your doctor.
Why does hematocrit come back after a donation?
A donation removes red cells, but the dose that drove them up is still there, so it usually climbs back over one to three months.
Related markers
Not medical advice
This explains what the number is and why it moves. It is not medical advice; decisions belong to you and your clinician.