19/03/2026
Understanding TSH, T3, and T4 🧐🩺👇👇👇👇👇
TSH, T3, and T4 are blood tests used to evaluate thyroid gland function. They help diagnose thyroid disorders such as Hypothyroidism and Hyperthyroidism.
📌TSH (Thyroid-Stimulating Hormone)
• Produced by: Pituitary gland
• Function: Stimulates the thyroid gland to produce T3 and T4.
• Normal range: ~0.4–4.0 mIU/L (may vary by lab)
Interpretation
• High TSH: Usually indicates hypothyroidism (thyroid underactive).
• Low TSH: Usually indicates hyperthyroidism (thyroid overactive).
📌T3 (Triiodothyronine)
• The active thyroid hormone that affects body metabolism.
• Controls:
• Heart rate
• Body temperature
• Energy use
Normal Range
• Total T3: ~80–200 ng/dL
Increased In
• Hyperthyroidism
• Thyroid storm
Decreased In
• Hypothyroidism
• Severe illness
📌T4 (Thyroxine)
• The main hormone produced by the thyroid gland.
• Converted in the body to T3.
Normal Range
• Total T4: ~5–12 µg/dL
Increased In
• Hyperthyroidism
Decreased In
• Hypothyroidism
MOL DIAGNOSTIC PATHOLOGY LABORATORY is a trusted name in precise and reliable diagnostic services. We are dedicated to delivering accurate and timely pathology reports, supporting clinicians in effective patient management. Our commitment is to quality, using advanced technology and maintaining the highest standards of professional excellence.
