Blood Testing
Thyroid Screen
What is the Thyrpid Gland?
The thyroid is a small, butterfly-shaped gland located in the front of your neck. It produces hormones that regulate many important functions in your body, including metabolism, energy levels, temperature regulation, and growth. These hormones—primarily thyroxine (T4) and triiodothyronine (T3)—are essential for keeping your body’s systems working properly.
What Are Thyroid Disorders?
Thyroid disorders occur when the thyroid gland produces too much or too little of these hormones. The two main types of thyroid disorders are:
Hypothyroidism (Underactive Thyroid): This occurs when the thyroid doesn’t produce enough hormones. Symptoms may include fatigue, weight gain, depression, constipation, dry skin, and sensitivity to cold.
Hyperthyroidism (Overactive Thyroid): This occurs when the thyroid produces too much hormone. Symptoms may include weight loss, rapid heartbeat, anxiety, tremors, excessive sweating, and difficulty sleeping
What Does Our Thyroid Screen Test For?
- TSH (Thyroid Stimulating Hormone) TSH is produced by the pituitary gland in your brain. It signals your thyroid to produce thyroid hormones (T3 and T4). The level of TSH in your blood is often the first test used to evaluate thyroid function.
High TSH levels can indicate hypothyroidism (underactive thyroid), meaning your thyroid isn't producing enough hormones.
Low TSH levels can suggest hyperthyroidism (overactive thyroid), meaning your thyroid is producing too much hormone.
- TT4 (Total Thyroxine) T4 is the main hormone produced by the thyroid. The TT4 test measures the total amount of T4 in your blood, including both bound (attached to proteins) and free (unbound) forms.
Low T4 levels are typically seen in hypothyroidism.
High T4 levels can indicate hyperthyroidism. - TT3 (Total Triiodothyronine) T3 is the more active thyroid hormone that controls many of the body’s processes. The TT3 test measures the total amount of T3 in your blood.
Low T3 levels may suggest hypothyroidism.
High T3 levels are often seen in hyperthyroidism.
Why Are These Tests Important?
Testing TSH, TT4, and TT3 levels help understand how well your thyroid is functioning and whether it’s producing the right amount of hormones. These tests are particularly important if you’re experiencing symptoms like fatigue, weight changes, hair loss, or mood swings. The results help guide treatment decisions, such as medication or lifestyle changes, to manage your thyroid disorder effectively.
Early diagnosis and treatment of thyroid disorders can prevent complications and help improve your quality of life.
