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Symptoms and Signs of an Underactive Thyroid | Functional Medicine, Functional Nutrition, Nutrition Consultancy, Advanced Laboratory Testing, Corporate Health Plans.

Symptoms and Signs of an Underactive Thyroid


  • Symptoms: lethargy, sensitivity to cold, heat intolerance, mood swings and depression, poor memory and concentration, joint pains and morning stiffness, headaches, vertigo and deafness, pre-menstrual tension, voice changes, loss of libido and susceptibility to viral infections.

  • Signs: weight gain, fluid retention, puffy face, puffy eyes, hair loss (classically the outer third of the eyebrows), cold extremeties and dry skin, rashes, eczema and boils, enlargement of the tongue, hoarse voice, hypoglycaemia, constipation, menstrual problems, skin problems and tendency to infections, slow pulse or bradycardia, goitre, infertility, digestive problems, slowed Achilles tendon reflex, carpal tunnel syndrome.

    Home Test: Basal Body Temperature Test (Broda Barns). 

    Use a mercury thermometer to take the temperature in the armpit over 10 minutes immediately on wakening. Temperatures consistently below 97.8 degrees F (36.6 degrees C) indicates slow metabolic rate. Remember that low body temperature can also be caused by poor mitochondrial function.

    How to test through a Functional Laboratory HERE

Nutrients required for Healthy Thyroid Function

  • Amino Acids / Proteins

  • Magnesium

  • Zinc

  • B12

  • Iodine

  • Vitamin C

  • B2

  • Selenium

  • Vitamin D

  • Vitamin A