The thyroid is a small butterfly-shaped gland located in the neck. It produces hormones that help regulate how the body uses energy, alongside supporting heart rate, digestion, body temperature, and normal metabolic function.

Because thyroid hormones affect multiple systems throughout the body, changes in thyroid function can sometimes contribute to a wide range of non-specific symptoms.

Many people first explore thyroid testing when experiencing symptoms such as:

• ongoing fatigue

• unexplained weight changes

• sensitivity to cold or heat

• hair thinning

• brain fog or difficulty concentrating

• menstrual irregularities

• changes in mood or energy levels

Symptoms associated with thyroid dysfunction can overlap with other health conditions or life stages, including stress, menopause, nutritional deficiencies, or general wellbeing concerns.

A thyroid blood test typically measures:

• TSH (Thyroid Stimulating Hormone) – helps regulate thyroid hormone production

• Free T4 (Thyroxine) – the main hormone produced by the thyroid gland

• Free T3 (Triiodothyronine) – the active thyroid hormone involved in metabolism and energy regulation

These markers are often interpreted together to provide a broader picture of thyroid function.

TSH is commonly used as an initial screening marker for thyroid function. However, additional thyroid hormones such as Free T4 and Free T3 may provide further context depending on the clinical situation.

Assessing these markers together may help provide more information about how the thyroid gland is functioning and whether additional medical follow-up may be appropriate.

Thyroid test interpretation should always consider:

• symptoms

• medications

• pregnancy status

• medical history

• previous thyroid conditions

Thyroid test results should be interpreted by a qualified healthcare professional in the context of your symptoms, medical history, medications, and other clinical information. An abnormal result does not always indicate a thyroid disorder on its own.

Examples may include:

• Elevated TSH with low Free T4 may be associated with hypothyroidism

• Low TSH with elevated thyroid hormones may be associated with hyperthyroidism

• Borderline changes may require repeat testing or ongoing monitoring

Some people also use thyroid testing to establish a baseline or monitor changes over time in consultation with their healthcare provider.

BODYiQ provides self-requested thyroid blood testing through Awanui’s nationwide collection centre network.

How it works:

1. Order your test online
2. Visit an Awanui collection centre
3. Have your sample collected by qualified staff
4. Receive your results securely online

Testing is performed in IANZ-accredited Awanui laboratories used by healthcare providers throughout New Zealand.