Thyroid Profile (Basic) (T3, T4, TSH) Test

A Thyroid Profile (Basic) typically includes measurements of three key thyroid hormones: T3 (triiodothyronine), T4 (thyroxine), and TSH (thyroid-stimulating hormone). Here's an overview of what each component measures and why the test is important:

Thyroid Profile (Basic) Components

1. T3 (Triiodothyronine):

   • Function: T3 is one of the two main hormones produced by the thyroid gland and is more biologically active than T4.
   • Role: Regulates metabolism, heart rate, and body temperature.

2. T4 (Thyroxine):

   • Function: T4 is the primary hormone produced by the thyroid gland.
   • Role: Converted into T3 in tissues and regulates metabolism, growth, and energy levels.

3. TSH (Thyroid-Stimulating Hormone):

   • Source: Produced by the pituitary gland in response to thyroid hormone levels in the blood.
   • Role: Stimulates the thyroid gland to produce T3 and T4. Elevated TSH levels typically indicate an underactive thyroid (hypothyroidism), while low levels suggest an overactive thyroid (hyperthyroidism).

Why is the Thyroid Profile (Basic) Test Important?

• Diagnosis: Helps diagnose thyroid disorders such as hypothyroidism (low thyroid function) or hyperthyroidism (excessive thyroid function).
• Monitoring: Used to monitor thyroid function in patients undergoing thyroid hormone replacement therapy.
• Symptoms: Assists in evaluating symptoms associated with thyroid dysfunction, including weight changes, fatigue, hair loss, and changes in mood.

When Should You Get a Thyroid Profile (Basic) Test?

• Symptoms: If you have symptoms of thyroid dysfunction, such as unexplained weight changes, fatigue, sensitivity to cold or heat, or mood swings.
• Family History: Individuals with a family history of thyroid disorders.
• Pregnancy: Routine testing during pregnancy to monitor thyroid function, as it can affect fetal development.