Thyroid Plus

Thyroid Plus

The thyroid is the body’s thermostat, controlling temperature, growth rate and energy use. It regulates the rate at which the body uses food and affects the operation of almost all bodily processes and organs. An under-functioning thyroid gland can result in a condition known as hypothyroidism.

Hypothyroidism is thought to be one of the most under-diagnosed conditions in the world today, affecting children, adolescents and adults.

This disorder can produce many diverse symptoms including fatigue, weight gain, depression and constipation. The thyroid gland can also over-secrete thyroid hormones, resulting in hyperthyroidism with symptoms ranging from weight loss and palpitations to anxiety and diarrhoea.


Conditions associated with hypothyroidism:

  • Constipation
  • Cold intolerance/ low body temperature
  • Depression
  • Dry, coarse or thick skin
  • Excessive fatigue
  • Goitre – enlarged, swollen and lumpy thyroid
  • Hair loss
  • Headaches (including migraines)
  • Infertility and impotence
  • Low sex drive
  • Menstrual/ menopausal problems
  • Unexplained weight gain or difficulty losing weight


Conditions associated with hyperthyroidism:

  • Anxiety
  • Breathlessness
  • Diarrhoea
  • Hair loss
  • Hyperactivity
  • Insomnia
  • Increased perspiration, intolerance to heat
  • Menstrual irregularities
  • Palpitations
  • Protruding eyes
  • Vitiligo
  • Weight loss

The Thyroid Plus measures the levels of all the different thyroid hormones in the blood including:

Serum levels of TSH, free T4, free T3, reverse T3, anti-TG antibodies and anti-TPO antibodies.


Blood sample requiring a blood draw.

Medications that may interfere with test results include glucocorticoids (e.g., prednisone), dopamine, lithium, interferon-alpha, phenobarbital, phenytoin, heparin, clofibrate, carbamazepine and colestipol.

Do not stop taking any medication without consulting with your GP.

18 years and above.

Once you’ve collected your sample, you’ll need to send it back to the lab via a next day service, which is offered by Royal Mail if you’re in the UK. If you’re outside of the UK, please check with your postal service for options. The cost of the test does not cover the return postage.

Please note that samples should only be posted on Monday – Thursday so that they do not arrive over the weekend when the lab is closed.

10 working days.

Your test results will be emailed to you.

Thyroid Plus


Please do not return samples to the laboratories that may arrive after Wednesday 27th March and up to and including Monday 2nd April.

The laboratories are closed from the 28th March – 2nd April for the Easter Holiday.