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Hypothyroidism (also called underactive thyroid, low thyroid or hypothyreosis) is a disorder of the endocrine system in which the thyroid gland does not produce enough thyroid hormones. [3] It can cause a number of symptoms, such as poor ability to tolerate cold , extreme fatigue, muscle aches , constipation , slow heart rate , depression , and ...
Low levels of thyroid hormones can lead to symptoms including fatigue, weight gain, cold intolerance, dry, flakey skin, loss of hair and inability to concentrate.
Over time, thyroid damage can cause thyroid hormone levels to be too low. This is called an underactive thyroid or hypothyroidism (heye-poh-THEYE-royd-ism). An underactive thyroid causes every function of the body to slow down, such as heart rate, brain function, and the rate your body turns food into energy. Hashimoto's disease is the most ...
The most useful marker of thyroid gland function is serum thyroid-stimulating hormone (TSH) levels. TSH levels are determined by a classic negative feedback system in which high levels of T3 and T4 suppress the production of TSH, and low levels of T3 and T4 increase the production of TSH. TSH levels are thus often used by doctors as a screening ...
Reader's DigestSilent Signs of a Thyroid ProblemKnow the symptoms of an overactive and underactive thyroid before it interferes with your life. Several mysterious symptoms—from weight changes to ...
Endogenous thyroid hormone levels may fluctuate, particularly early in the disease. [75] This can be due to a number of factors, but can be caused by autoimmune attacks on the thyroid resulting in rises in thyroid hormone levels (as thyroid hormones leak out of the damaged tissues). [21]
One in four Mexican-American women and about one in six white women over 50 years old have osteoporosis. ... The most common cause of low estrogen levels is menopause. ... Women up to age 70: 600 ...
Thyroid disease also has a marked effect on BMR, since thyroid hormones regulate the rate of cellular metabolism. [3] Hyperthyroidism—in which there is an increase in the production of thyroid hormones—leads to a high BMR, while hypothyroidism—in which thyroid hormones are depleted—causes a low BMR. [1]