Magno Thyroid
Free T3 on TRT
What the number means, why it moves on a protocol, and what people usually do about it.
What it is
Free T3 is the active thyroid hormone, the one that sets metabolic rate. It is the first thyroid number to fall in a hard diet.
The range
TRT-aware target
Read against the lab range and the trend
How to read the lab range
Lab range roughly 2.3 to 4.2 pg/mL (3.5 to 6.5 pmol/L). People feel best in the upper half.
Why it moves on a protocol
- Calorie deficit lowers it fast; a refeed brings it back.
- Selenium and zinc shortfalls slow the conversion from T4.
- Growth hormone raises conversion a little.
What people usually do · not a recommendation
- Diet breaks every few weeks on a long cut.
- Selenium, zinc, and enough carbohydrate.
How Magno reads it
Import the PDF or a photo of the report and Magno finds Free T3 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, Thyroid, 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.
Questions people ask
Low free T3 with normal TSH?
Diet or stress lowering conversion. It is not thyroid disease and it fixes itself with food and sleep.
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.