inspiring canadians to live better.

healthing leaf

inspiring canadians to live better.

healthing leaf
get healthing in your inbox with the morning checkup and weekender newsletter!

top of the page

thyroid hormones

overview

thyroid hormones affect every cell and all the organs of the body. too much thyroid hormone speeds things up and too little thyroid hormone slows things down. they:

  • control the rate at which your body burns calories (your metabolism). this affects whether you gain or lose weight.
  • can slow down or speed up your heartbeat.
  • can raise or lower your body temperature.
  • change how fast food moves through your digestive tract.
  • affect muscle strength.
  • control how quickly your body replaces dying cells.

thyroid hormones are made by the thyroid gland. the thyroid gland makes and releases two thyroid hormones: thyroxine (t4) and triiodothyronine (t3).

the thyroid gland and the pituitary gland work together. the pituitary gland (located near the base of the brain) makes, stores, and releases thyroid-stimulating hormone (tsh). when tsh is secreted by the pituitary gland, it causes the thyroid gland to release more t3 and t4. a high tsh level means there isn't enough thyroid hormone, and a low tsh level means there is too much.

credits

current as of: october 2, 2023

author: healthwise staff
clinical review board
all healthwise education is reviewed by a team that includes physicians, nurses, advanced practitioners, registered dieticians, and other healthcare professionals.

this information does not replace the advice of a doctor. healthwise, incorporated, disclaims any warranty or liability for your use of this information. your use of this information means that you agree to the terms of use. learn how we develop our content.

this information does not replace the advice of a doctor. healthwise, incorporated, disclaims any warranty or liability for your use of this information. your use of this information means that you agree to the terms of use and privacy policy. to learn more about healthwise, visit healthwise.org. © 1995-2022 healthwise, incorporated. healthwise, healthwise for every health decision, and the healthwise logo are trademarks of healthwise, incorporated.

advertisement