Thyroid Plus


  • Struggling to lose weight
  • Symptoms of thyroid dysfunction (under or overactive)
  • Symptoms of underactive thyroid but normal TSH and Total T4 according to GP blood tests
  • Diagnosed with a thyroid issue and want to investigate the root cause

The thyroid is responsible for metabolism in the body and affects how fast processes run inside the cells. The thyroid produces T4 (thyroxine) which is converted by an enzyme to its active form T3 (tri-iodothyronine) which can be used by the cells. The hypothalamus and pituitary monitor and regulate the amount of thyroid hormones produced using thyroid-stimulating hormones (TSH). Thyroid problems occur when the monitoring system breaks down, the thyroid gland is damaged, T4 isn’t properly converted to T3 or there are insufficient nutrients or minerals to make the hormones. Hypothyroidism (underactive thyroid) causes slowing of metabolism leading to symptoms such as, weight gain, feeling cold, fatigue, hair loss, muscle aches, constipation, low libido, low mood or irritability and weakness. Hyperthyroidism (overactive thyroid) results in the metabolism going into overdrive leading to sweating, intolerance to heat, frequent bowel movements, rapid heart rate, sweating, anxiety, restlessness and agitation and tremors.

GP thyroid tests only measure the levels of TSH and T4 which picks up only on serious thyroid pathology. Unfortunately, these tests don’t pick up on the root cause of the problem. 


The Comprehensive Thyroid Assessment test gives a much more comprehensive picture of thyroid function, including:

  • TSH – Released from the pituitary gland, TSH stimulates the thyroid gland to make more hormones. TSH increases when there are problems with the thyroid.
  • Total T4 – T4 levels decrease in hypothyroidism and increases in hyperthyroidism
  • Free T4 –  This is the unbound form of T4, which is decreased in hypothyroidism and increases hyperthyroidism
  • Free T3 –  T3 is the active thyroid hormone, low levels may suggest an issue with hormone conversion
  • Reverse T3 – is the ‘non-active form of T3 and high levels stop normal T3 from functioning properly
  • Anti-thyroglobulin (Anti-TG) and Anti-thyroid peroxidase (Anti-TPO) antibodies – occur when the immune system is attacking and damaging the thyroid. High levels suggest an autoimmune cause.


10 days