TSH (Thyroid Stimulating Hormone)
What is it?
TSH is a pituitary hormone that regulates the thyroid. It rises in hypothyroidism and falls in hyperthyroidism.
Normal ranges
Adults: 0.4–4.0 mIU/L.
Units: mIU/L
Causes of deviations
Low levels:
Hyperthyroidism, thyroid hormone overdose.
High levels:
Hypothyroidism, iodine deficiency, thyroiditis.
When to see a doctor
Any deviation requires thyroid function evaluation.
This information is for educational purposes and does not replace medical advice.
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