Track Your Free T4(FT4)
Monitor active thyroid hormone over time
Track Your Free T4 in 3 Simple Steps
Professional health tracking made simple
1. Upload PDF
Upload your lab results PDF from Quest, LabCorp, or any lab. We support all major lab formats.
2. AI Extraction
Our AI extracts your Free T4 values and all other biomarkers in under 30 seconds.
3. Clinical-Grade Charts
View your Free T4 trends over time with clinical-grade visualizations.
Why Track Free T4?
The active form of thyroid hormone that's not bound to proteins. Free T4 is the form that cells can actually use.
Monitor active thyroid hormone over time
Track thyroid function alongside TSH
Identify hyperthyroidism or hypothyroidism patterns
Evaluate thyroid medication effectiveness
Free T4 Reference Information
Understanding your Free T4 results
What It Measures
High levels indicate hyperthyroidism. Low levels indicate hypothyroidism. More accurate than total T4 since it's not affected by protein levels.
Factors That Can Affect Free T4
Thyroid function, protein binding, medications, pregnancy
Medical Source: 2016 ATA Guidelines for Diagnosis and Management of Hyperthyroidism
LOINC Code: 3024-7
Medical Disclaimer: This information is for educational purposes only and does not constitute medical advice. Always consult with qualified healthcare professionals for medical interpretation of your Free T4 results and any health concerns.
Related Thyroid Function Biomarkers
Track other biomarkers in the same category for comprehensive health monitoring
TSH
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Free T3
The most active form of thyroid hormone. T3 is converted from T4 and has stronger effects on metabol...
TPO Antibodies
Antibodies that attack thyroid peroxidase, an enzyme needed for thyroid hormone production. Elevated...
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