A thyroid imbalance, such as an overactive or underactive thyroid, can lead to problems with your weight, energy and mood.
Symptoms of an overactive thyroid include weight loss, fatigue, irritability and difficulty sleeping. Whereas, symptoms of an underactive thyroid include weight gain, hair loss, forgetfulness and low mood.
Testing thyroid hormones and antibodies help identify any potential issues with the thyroid gland such as a thyroid imbalance or an autoimmune condition.
Despite a thyroid condition needing medical intervention, there are lifestyle changes you can make to help manage the symptoms and support your wellbeing.
The difference between an underactive and an overactive thyroid are the levels of hormones the gland produces. For that reason, the symptoms can differ according to how fast or slow your body’s cells are working.
If you have hyperthyroidism (an overactive thyroid), then your thyroid is producing too much thyroid hormone and causing your body’s cells to work at a faster rate.
The symptoms of an overactive thyroid, include:
The condition can also cause physical symptoms which you or close friends and family may find more noticeable such as:
An underactive thyroid or hypothyroidism is the most common thyroid disorder. Because your cells are working too slow as a result of too little thyroid hormones being produced, it can cause:
“Thyroid disorders are quite common, affecting around 5% of the UK population with women being more prone to thyroid disorders than men. If you are experiencing symptoms of fatigue, mood changes, poor sleep or unexplained weight gain or loss then you may have a thyroid issue. This advanced thyroid test can be easily done at home and will help identify a thyroid disorder. It checks your levels of TSH, T4, T3 as well as thyroid antibodies. High T3 and T4, combined with low levels of TSH are indicative of an overactive thyroid, whereas low levels of T3 and T4 with high levels of TSH are associated with an underactive thyroid. NICE set TSH levels above 10 mU/L as indicative of hypothyroidism.”
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Thyroid-stimulating hormone (TSH) is produced by the pituitary gland and acts on the thyroid to stimulate it to produce the hormones thyroxine and triiodothyronine.
An overactive thyroid, also known as hyperthyroidism, means you have too much thyroid hormone acting on the cells in your body which speeds them up. Their increased function can cause a variety of symptoms, such as anxiety, fast heartbeat, weight loss, sleep disturbances, trembling, and excessive sweating.
Thyroid conditions can be caused by autoimmune diseases where your immune system mistakenly attacks its own cells resulting in an immune response and some unpleasant symptoms.
Graves’ disease, for example, causes hyperthyroidism or an overactive thyroid. Because your immune cells attack the thyroid, it causes it to produce more thyroid hormones than your cells need and speeds up the rate at which they work. Whereas Hashimoto’s disease is an autoimmune condition that causes an underactive thyroid (hypothyroidism). It occurs when your immune system attacks the thyroid causing damage which results in not enough thyroid hormones being produced and slowing down your cells’ metabolism.
Triiodothyronine, also known as T3, is a hormone produced by your thyroid and affects nearly all of the processes in the body. It helps to regulate your metabolism, so how fast or
slow your cells work.
An underactive thyroid is also known as hypothyroidism and is caused by a lack of thyroid hormones. Because there aren’t enough thyroid hormones being made, the activity of your cells slows down and causes symptoms such as weight gain, low mood, and forgetfulness.
TSH – 0.27-4.2 mIU/L
Thyroxine (FT4) – 12-22 pmol/L
Triiodothyronine (FT3) – 3.1 – 6.8 pmol/L
Please note reference ranges can vary by lab and analytical process.
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