Magno Thyroid
Free T4 on TRT
What the number means, why it moves on a protocol, and what people usually do about it.
What it is
Free T4 is the storage form of thyroid hormone, made by the gland and converted to T3 in tissue. It moves slowly and shows what the thyroid itself is producing.
The range
TRT-aware target
Read against the lab range and the trend
How to read the lab range
Lab range roughly 0.8 to 1.8 ng/dL (12 to 22 pmol/L). Low with a high TSH is hypothyroidism; low with a low TSH is a pituitary or medication story.
Why it moves on a protocol
- Thyroid disease.
- T3 supplementation lowers it because the gland stops making its own.
What people usually do · not a recommendation
- Read with TSH and free T3 together, never alone.
How Magno reads it
Import the PDF or a photo of the report and Magno finds Free T4 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
Free T4 low on T3, is that a problem?
Expected. Taking T3 turns the gland down. It returns after stopping.
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.