A TSH (Thyroid Stimulating Hormone) test is the primary screening test for evaluating thyroid function. TSH is produced by the pituitary gland and signals the thyroid to produce thyroid hormones.
What This Test Measures
Thyroid Stimulating Hormone (TSH):
TSH regulates the production of thyroid hormones T3 and T4. When thyroid hormone levels are low, the pituitary releases more TSH to stimulate the thyroid. When thyroid hormones are high, TSH production decreases.
• High TSH typically indicates the thyroid is underactive (hypothyroidism)
• Low TSH typically indicates the thyroid is overactive (hyperthyroidism)
Reference Ranges
Normal TSH range is generally 0.4-4.0 mIU/L, though optimal ranges may be narrower (0.5-2.5 mIU/L according to some guidelines). Ranges vary slightly by laboratory. Results should be interpreted by a healthcare provider.
Who Should Consider This Test
• Individuals experiencing symptoms of thyroid dysfunction
• Those with family history of thyroid disease
• Women planning pregnancy or who are pregnant
• People taking thyroid medication to monitor treatment
• Adults over 60 (thyroid disorders are more common with age)
• Anyone with autoimmune conditions
Symptoms of Hypothyroidism (underactive thyroid):
• Fatigue and sluggishness
• Unexplained weight gain
• Cold intolerance
• Dry skin and hair
• Constipation
• Depression
Symptoms of Hyperthyroidism (overactive thyroid):
• Unexplained weight loss
• Rapid heartbeat or palpitations
• Nervousness, anxiety, irritability
• Heat intolerance, excessive sweating
• Tremors
• Difficulty sleeping
How It Works
1. Order your test online – no doctor visit required
2. Visit any Quest Diagnostics location nationwide
3. Simple blood draw takes approximately 5 minutes
4. Results delivered to your secure portal within 1-2 business days
Preparation
No fasting required. If you take thyroid medication, follow your healthcare provider’s instructions about timing relative to your dose.
Related Tests to Consider
• Free T4 – Direct measure of active thyroid hormone
• Free T3 – Another active thyroid hormone
• Thyroid Peroxidase Antibodies – Tests for autoimmune thyroid disease
• Comprehensive Thyroid Panel – Complete thyroid evaluation
Why Choose Wittmer Rejuvenation Clinic
At $12.75, our TSH test is significantly less expensive than typical hospital charges ($40-$200+). We partner with Quest Diagnostics for reliable, CLIA-certified laboratory testing with convenient locations across all 50 states.
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