Your Thyroid Gland
Hormones play a role in controlling functions such as your metabolism, hunger, cravings, sexual function, physiology, reproduction, moods and energy levels as well as skin and hair health.
Thyroid gland conditions are 4-5 times more likely to develop in women than in men and will contribute to issues with weight gain and fatigue, among much more.
WHAT IS YOUR THYROID GLAND?
Your thyroid gland is a crucial part of your body’s endocrine system and is found in prime position, at the front of your neck. Just like your menstrual cycle, thyroid function is also a brain driven event via a feedback loop between your hypothalamus and pituitary gland (in your brain) and your thyroid gland. Through the production of thyroid hormones, your thyroid controls your moods, body temperature, metabolic rate and energy production.
WHAT IS REQUIRED FOR HEALTHY THYROID FUNCTION?
When you have a test for your thyroid function, this will often be limited to just one small portion of the thyroid hormone picture (known as the TSH test). Among TSH, there are other hormones and antibodies which can positively and negatively effect your thyroid function. These include:
· Thyroid releasing hormone (TRH)
· Thyroid stimulating hormone (TSH)
· L-Thyroxine (T4)
· Triiodothyronine (T3)
· Reverse T3 (RT3)
· Thyroid antibodies: Thyroglobulin (TG) and Thyroid Peroxidase (TPO)
THYROID RELEASING HORMONE (TRH) - regulates the release of TSH by the pituitary gland (in your brain).
THYROID STIMULATING HORMONE (TSH) - Once released by your pituitary gland, TSH stimulates the release of thyroid hormones, T3 and T4. It will increase when the body requires more thyroid hormones and will be decreased when there is abundance, to signal to the body to slow thyroid hormone production.
L-THYROXINE (T4) - Produced and released by the thyroid gland, T4 makes up approximately 85% of the thyroid hormone. As T4 is the relatively inactive form of thyroid hormone, small amounts are converted into T3 for the body to use it for important bodily functions.
TRIIODOTHYRONINE (T3) - Majority of the T4 and T3 circulates in your bloodstream bound to a protein. The small percentage which is not bound is referred to as free T4 and free T3. Free T3 is the most active thyroid hormone and is produced by the thyroid gland and the body also converts low levels of T4 into T3, in order to activate and energise all of the cells of the body. Free T3 controls your metabolism, energy levels, body temperature, your bowel movements and impacts the health of your adrenal and sex hormones.
REVERSE T3 (RT3) - When the body is in a state of stress, adrenal imbalance (high or low cortisol production), toxicity and/or nutritional deficiencies, T4 can be converted into the inactive Reverse T3 (RT3), instead of T3.
THYROID ANTIBODIES - Thyroid antibodies are a measurement of the body mistakenly attacking your thyroid and include Thyroglobulin (TG) and Thyroid Peroxidase (TPO) antibodies. When inflammation progresses in the body, this creates confusion between normal tissue and foreign invaders. The body starts attacking its own tissues and the symptom of an auto-immune condition develops. Hashimotos thyroiditis and graves disease are examples of autoimmune conditions of the thyroid gland.
WHAT HAPPENS WHEN YOUR THYROID GLAND STRUGGLES?
When your thyroid function is affected through either low thyroid hormone (T4 and T3), high RT3, or antibody production, symptoms start to appear.
ONE OR MORE OF THE FOLLOWING SYMPTOMS MAY BE CAUSED BY A STATE OF HYPOTHYROIDISM:
· Fatigue
· Weight gain
· Cold intolerance & cold extremities
· Dry skin or hair
· Hair loss, or thinning
· Loss of outer third of eyebrow
· Constipation
· Poor concentration
· Low motivation
· Depression
· Apathy
· Loss of memory
· Muscle aches, cramps and pain
· Fluid retention
· Low heart rate
· Abnormal cholesterol and triglyceride levels
· Irregular and heavy periods
· Infertility and trouble with lactation when breastfeeding
IF YOU ARE FREQUENTLY STRUGGLING WITH A NUMBER OF THESE SYMPTOMS OR CONDITIONS, HYPERTHYROIDISM MAY BE AN UNDERLYING CAUSE OF YOUR HEALTH CHALLENGES:
· Fatigue
· Weight loss
· Heat intolerance
· Increased sweating
· Frequent bowel movements
· Poor concentration
· Anxiety
· Restless legs
· Irritability
· Insomnia
· Muscle weakness
· Shortness of breath
· Heart palpitations
· High blood pressure
· Irregular periods
· Infertility
· Miscarriage
WHAT ARE THE CAUSES OF YOUR THYROID GLAND IMBALANCE
Here is a brief list of contributing factors of unhealthy thyroid function.
· Poor gut health & food intolerances
· Insulin resistance
· Long standing infections
· Vitamin and mineral deficiencies
· Toxicity, including heavy metals and endocrine disrupting chemicals
· Stress
· Autoimmune conditions, including coeliac disease
HOW DO YOU TEST FOR THYROID FUNCTION?
You can have a thyroid function test performed through your GP however you may come across one of two challenges when asking for a thyroid test.
1. YOUR GP WILL ONLY TEST FOR TSH
By merely testing TSH, you cannot accurately determine the function of the thyroid gland and the effects it has on your body. Unfortunately, General Practitioners are under a lot of pressure to meet Medicare guidelines, which prevent them from completing this full thyroid panel (unless the initial TSH result is skewed). In most cases it is not out of the labs reference range.
2. YOUR GP WILL REPORT THAT YOUR THYROID FUNCTION IS ‘NORMAL’
Unfortunately, the conventional approach to thyroid treatment is to wait until thyroid function is severely affected before a treatment approach of hormone replacement is given. Reference ranges on blood tests are much larger than optimal ranges and therefore many patients are undiagnosed for underactive thyroid function for many months, or even years.
In order to have healthy thyroid function throughout your body, additional to normal TSH readings, the following needs to occur:
· Adequate production of the T4 hormone
· Effective conversion of T4 into the active T3
· Prevention of T4 into dangerous RT3
· Prevention of the body producing thyroid antibodies.
You can see that by merely testing TSH, you cannot accurately determine the function of the thyroid gland and the effects it has on the body.
A simple test to do at home - is to record your first morning underarm body temperature (after 10 mins of lying flat in bed). If it does not fall between the normal ranges of 36.4 – 36.9 degrees Celsius (most accurately tested between days 2-9 of your menstrual cycle), this is an indication of poor conversion of T4 into active T3.
Above all, tune into your body and listen to what your body it is telling you. If you either have a test indicate thyroid issues or you can relate to multiple thyroid imbalance symptoms then working to nourish your thyroid gland will benefit your health.