Thyroid Stimulating Hormone (TSH) is produced by the pituitary gland to regulate thyroid function. It signals the thyroid to produce thyroid hormones, which are crucial for metabolism, energy, and growth. TSH levels help diagnose thyroid disorders, indicating whether the thyroid is functioning properly....


Who would benefit from testing their TSH levels?

Individuals with symptoms of thyroid dysfunction, family history of thyroid disease, or those undergoing treatment for thyroid disorders should test their TSH levels. It’s also recommended for people experiencing unexplained weight changes, fatigue, or mood fluctuations.

What are symptoms of low or high TSH levels?

Underactive Thyroid (Hypothyroidism):

    • Fatigue and sluggishness
    • Unexplained weight gain
    • Dry skin and hair
    • Sensitivity to cold
    • Constipation

Overactive Thyroid (Hyperthyroidism):

    • Unintended weight loss
    • Increased heart rate
    • Anxiety and nervousness
    • Heat intolerance
    • Insomnia

Why is it not enough to measure only TSH?

Measuring only TSH can miss subtler forms of thyroid dysfunction. TSH levels can be normal while thyroid hormones (T3 and T4) are not, which is why testing T3 and T4 alongside TSH provides a more comprehensive view of thyroid health.

What do high and low levels of TSH mean?

  • High TSH Levels: Indicate an underactive thyroid (hypothyroidism), where the thyroid gland isn’t producing enough hormones, prompting the pituitary gland to release more TSH.
  • Low TSH Levels: Suggest an overactive thyroid (hyperthyroidism), where the thyroid produces too many hormones, leading to reduced TSH production by the pituitary gland.

Test(s) that measure/test for TSH

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