Type
Blood Testing
Biomarkers
8
Duration
15 min
Results
48 hours
A dedicated thyroid panel measuring five biomarkers including TSH, free T3, free T4, and thyroid antibodies. Goes beyond the standard TSH-only test that most GPs order, enabling detection of subclinical thyroid dysfunction and autoimmune thyroid conditions like Hashimoto's disease.
The Full Thyroid Check measures the complete thyroid hormone cascade — TSH (the pituitary signal), free T3 (the active hormone), and free T4 (the precursor) — along with thyroid antibodies that reveal autoimmune thyroid conditions. Standard GP thyroid screening typically only measures TSH, which can appear normal even when free T3 or T4 levels are suboptimal. Thyroid antibodies are particularly important because autoimmune thyroiditis (Hashimoto's disease) is the most common cause of hypothyroidism in Australia. Antibodies can be elevated years or even decades before TSH becomes abnormal, providing a crucial early warning window for intervention. This panel is especially relevant for those experiencing unexplained fatigue, weight changes, hair thinning, mood disturbances, or temperature sensitivity — all symptoms that can have thyroid origins but are often attributed to stress or ageing. Results arrive within 24-48 hours with full reference ranges.
Key Details
- Biomarkers
- 5
- Results
- 24-48 hours
- Key test
- Thyroid antibodies included
Who Is This For?
Thyroid screening, fatigue investigation, weight management, Hashimoto's detection, family history of thyroid disease
What's Included
Preparation Required
Morning blood draw recommended for most accurate TSH results. No fasting required.
Panel Categories
Biomarkers Tested
8The active form of thyroid hormone responsible for regulating metabolism, energy, and body temperature. Free T3 is converted from T4 in tissues and is three to four times more potent than T4.
The unbound, active form of the main thyroid hormone T4. Free T4 directly reflects thyroid gland output and is used alongside TSH to diagnose and monitor thyroid disorders.
Free triiodothyronine; high levels indicate hyperthyroidism, low levels hypothyroidism.
Free thyroxine; high levels indicate hyperthyroidism, low levels hypothyroidism.
A group of proteins in blood including antibodies (immunoglobulins), transport proteins, and enzymes. Elevated globulin can indicate chronic infection, inflammation, or blood cancers. Calculated by subtracting albumin from total protein.
An inactive form of T3 produced when the body converts T4. Elevated reverse T3 can occur during illness, stress, or caloric restriction and may indicate impaired thyroid hormone activation despite normal TSH levels.
Antibodies against thyroid peroxidase, an enzyme essential for thyroid hormone production. Positive TPO antibodies indicate autoimmune thyroid disease, most commonly Hashimoto's thyroiditis, even before symptoms or TSH changes appear.
The primary screening test for thyroid function. TSH is produced by the pituitary gland to regulate thyroid hormone production. High TSH indicates an underactive thyroid (hypothyroidism), while low TSH suggests an overactive thyroid (hyperthyroidism).
- Category
- Diagnostic
- Sample Type
- Blood (venous draw)
- Duration
- 15 min
- Results
- 48 hours