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The
thyroid produces two main thyroid hormones, thyroxine (T4) and triiodothyronine
(T3). Production of your thyroid hormones is governed by another thyroid
hormone produced in the pituitary gland located deep within the brain. This
thyroid hormone is called thyroid stimulating hormone (TSH).
While
TSH is considered a thyroid hormone it is not actually produced in the thyroid.
Once released by the pituitary TSH travels to the thyroid via the bloodstream
to stimulate production of the thyroid hormones.
When
levels of T4 and T3 fall, the pituitary secretes more TSH. Conversely, as T4
and T3 levels rise the pituitary secretes less TSH. Normally this feedback
system ensures your body has adequate amounts of both T4 and T3. When TSH is
high it is a clear indication your body is suffering from inadequate thyroid
activity.
A
healthy thyroid gland manufactures far greater quantities of T4 than T3. While
T4 does have some effects, it is considered the ‘storage’ form. T4 is converted
to T3 by the body when a greater thyroid response is needed. This means T4 is
on standby, ready to be quickly converted into the active T3 when it is
required to boost the metabolic rate.
Thyroid
disease results from an underactive or overactive thyroid that produces too
little or too much of the thyroid hormones. Knowing how your thyroid works
helps you understand your thyroid problem. It also helps you understand why
it’s vital to get more than TSH tested. The widely held belief that TSH is an
accurate marker of thyroid health is misleading.
Below
Here are 2 videos for you to understand more about thyroid hormones.
Read
the following related articles:
Author Bio:
Louise O’ Connor,
the author of The Natural Thyroid Diet –The 4-Week Plan to Living Well, Living Vibrantly, who
is a specialist in Thyroid Health. She is a highly regarded Australian
Naturopath and founder of Wellnesswork.
The Natural Thyroid
Diet goes beyond diet advice and offers practical and effective ways to achieve
healthy thyroid levels within just a short period of time. For more details,
Click on
The-Natural-Thyroid-Diet.com