Thyroid & iodine
Free T3 — optimal range for vegans & vegetarians
The active form of thyroid hormone.
Optimal range
3.5–6.8 pmol/L
How a value is read
| Deficient | < 3.1 pmol/L |
| Below optimal | 3.1 – 3.5 pmol/L |
| Optimal | 3.5 – 6.8 pmol/L |
| Above optimal | 6.8 – 7.5 pmol/L |
| Markedly high | > 7.5 pmol/L |
Bands are given in the marker's canonical unit; values in other units are converted automatically.
Why it matters on a plant-based diet
The active thyroid hormone. Low T3 with fatigue/cold — with TSH and T4 it refines hypothyroidism; depends on iodine and selenium.
A single marker decides nothing
Deficiencies mask one another: high folate hides low B12, inflammation inflates ferritin, low zinc mimics iron deficiency. VEGALYSIS reads the whole picture and explains the links.
Analyse my labsUnits
- pmol/L
- pg/mL× 1.536 → pmol/L
VEGALYSIS accepts any of these units and converts the value to the canonical one.
Names seen on lab reports
free t3 · ft3 · t3 свободный · свободный т3 · т3
Sources
Related markers
Educational material; not a substitute for a clinician's advice.