The normal range for T3 (Triiodothyronine (Total T3)) is 80-200 ng/dL. High T3 may indicate High T3 indicates hyperthyroidism — overactive thyroid. Can cause rapid weight l. Ask GoDavaii Health AI to analyze your complete lab report.

T3

Triiodothyronine (Total T3)

T3 is the active thyroid hormone. It affects metabolism, heart rate, body temperature, and brain function. Most T3 is converted from T4.

Normal Range

80-200 ng/dL

Unit: ng/dL

LOWNORMALHIGH
Below normal80-200 ng/dL ng/dLAbove normal
Medically Verified Ranges

What High T3 Means

High T3 indicates hyperthyroidism — overactive thyroid. Can cause rapid weight loss, anxiety, insomnia, and irregular heartbeat.

HyperthyroidismGraves' DiseaseToxic Nodular Goiter

What Low T3 Means

Low T3 can indicate hypothyroidism or 'sick euthyroid syndrome' (non-thyroid illness). The body sometimes lowers T3 during serious illness.

HypothyroidismSevere Illness

Frequently Asked Questions

Related Lab Tests

TSH

Thyroid Stimulating Hormone

Normal: 0.4-4.0 mIU/L

T4

Thyroxine (Total T4)

Normal: 5.0-12.0 mcg/dL

Disclaimer: Reference ranges may vary between laboratories. This is educational information, not medical advice. Upload your complete lab report in the GoDavaii app for AI-powered analysis in context of your health profile.

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