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Thyroid Check Upgrade

Essential Thyroid markers

FDX 23

According to the British Thyroid Foundation, 1 in 20 people in the UK suffers from thyroid disorders. However, this doesn’t tell the whole story as often thyroid disorders go undiagnosed. Why? Doctors believe this could be down to 2 main reasons. Firstly, mild cases of hypo- or hyperthyroidism don’t necessarily have symptoms, and secondly, when they do, they appear so slowly, that people misattribute them to other things. 

Undiagnosed thyroid disorders can create a greater strain on various bodily functions. Thyroid imbalances can often go undetected when certain crucial markers are not taken into account during testing. 

Identifying thyroid dysfunctions can reveal key information on imbalances within skin and hair, support weight management, and drastically improve mood and energy levels. 

Our comprehensive Thyroid CHECK offers the full spectrum of thyroid markers including T4, free T4, T3, Free T3, Reverse T3, T3 Uptake, many ratios and also includes glucose and a full blood count to accurately identify and ‘ check’ for subclinical disorders and help assess thyroid gland function.  


Suitable for:

  • Those that have shown signs and symptoms of a dysfunctional thyroid including lack of energy, body temperature disorders, hair loss, weight gain, gut motility and more.
  • Those needing to identify a hypothyroid or hyperthyroid status
  • Those looking to improve image, mood and quality of life

Key Biomarkers

Free t3
Free t4
Reverse T3
ft3:rT3 ratio
T3 Uptake
T7 Free Thyroxine index
Thyroglobulin Abs
Thyroid peroxidase antibody
Total T3
Total T4

You will need a main test first

Our FDX Thyroid Check panel has been created to look further than the norm (traditional blood analysis) to reveal more about your client’s health picture and to identify areas to focus an effective treatment plan. FunctionalDX uses the world’s most advanced blood interpretation technology considers 13 body systems, 7 accessory systems, 7 macronutrient systems, 14 micro-nutrient deficiencies and 40 clinical dysfunctions. 

Test guidelines:

Fasting blood draw required in the morning.


Additional Resources





Functional DX to me is the 'Go to Test' that I would use for patients before anything else
Oliver Barnet, ND