The thyroid is a small gland located just below the Adam’s apple that produces hormones to manage your body temperature, energy use, weight, muscle strength, and mood. Thyroid-stimulating hormone (TSH) is produced by the pituitary gland in the brain and tells the thyroid how much of these thyroid hormones to release. This means that TSH is a biomarker that can be used to evaluate thyroid health. If your pituitary gland notices that thyroid hormone levels are low, it produces TSH to signal to the thyroid to release more.
Low levels of TSH may indicate that your thyroid is overactive and producing too much thyroid hormones. This is called hyperthyroidism. Hyperthyroidism can lead to anxiety, weight loss, and difficulty sleeping. High TSH levels may indicate an underactive thyroid, a condition known as hypothyroidism. This may cause hair loss, weight gain, and tiredness. About 1 in 500 pregnant women experience hyperthyroidism¹ and both hyper- and hypothyroidism can continue after birth if a woman experienced either during pregnancy. Thyroid problems are also linked to both stress and iodine deficiency.
Those with an underactive thyroid can address their symptoms by taking a pill daily that contains thyroid hormones. Those with hyperthyroidism have many treatment options, including anti-thyroid medications.
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