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Thyroid Function Testing

Undetected high or low levels of thyroid hormones can lead to an increased risk of heart disease and stroke. Don’t leave your health to chance. Get tested. Take control of your health.


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How it works

Order online

Order your test online, select, and pay for your preferred panel.

Collect your sample

Choose to have our medical team come in for home sample collection or visit a Synlab centre near you for your sample collection.

Review accurate results

Accurate and confidential results are available on your secure online Pathprovider account. You will get notified as soon as your results are available.

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If you have any queries, please contact our 24-hour customer support centre at +234 700 7284 2273.



 More likely to develop thyroid disease.


More at risk of developing thyroid disease.


Thyroid disorders are the second most common hormone disorder in Nigeria.


The thyroid is a small, butterfly-shaped gland located at the front of the neck along your windpipe.

It is responsible for regulating your metabolism – the rate at which your cells use energy and produce heat. When your thyroid doesn’t work properly, it can impact your entire body.



Hypothyroidism (underactive thyroid) happens when your thyroid doesn’t create and release enough thyroid hormone into your body. This makes your metabolism slow down, affecting your entire body. Symptoms of hypothyroidism include:

  • Weight gain
  • Fatigue or feeling tired all the time
  • Slow pulse or heart rate
  • Hair loss or thinning
  • Poor tolerance of the cold
  • Depression
  • Dry, coarse or thickened skin
  • Constipation
  • Hand tingling or pain
  • Irregular period
  • Low sex drive
  • Muscle cramps
  • Impaired memory
Hyperthyroidism, (overactive thyroid), is a condition where your thyroid makes and releases high levels of thyroid hormone. This condition can make your metabolism speed up. Symptoms of hyperthyroidism include

  • Weight loss
  • Fatigue or feeling tired all the time
  • Increase or rapid heart rate
  • Tremors (usually in the hands)
  • Heat intolerance
  • Difficulty sleeping
  • Excessive sweating or fever
  • Frequent bowel movements or diarrhoea
  • Anxiety
  • Irregular period
  • Low sex drive
  • Enlarged thyroid gland (goitre)
  • Dry, watery, red or bulging eyes

Thyroid Function

The thyroid produces two major hormones: triiodothyronine (T3) and thyroxine (T4). These two hormones influence your …

  1. Metabolic rate
  2. Mood and energy levels
  3. Cholesterol levels
  4. Nervous system
  5. Heart rate
  6. Body temperature
  1. Digestive system
  2. Muscle control
  3. Brain development
  4. Bone maintenance
  5. Hair growth

Thyroid Dysfunction is caused by

Iodine deficiency

Iodine is used by the thyroid hormone to produce thyroid hormones. A deficiency of iodine in the diet may affect the ability of the thyroid gland to make thyroid hormones.

Autoimmune disease

Diseases in which an individual’s immune system attacks their own cells. When the cells attacked are those of the thyroid gland, it may result in abnormal functioning of the thyroid gland.


This may be secondary to a viral or, less commonly, a bacterial infection.

Medical or surgical treatments

Certain medical treatments, including radiation therapy, thyroid surgery, and some medications, can result in thyroid dysfunction.

Frequently Asked Questions

If you are still unsure about this test, here are some questions that we usually get asked.

Still need answers?

Why are thyroid hormones important?

The thyroid hormones are important for the optimal functioning of almost all the cells in the body. They influence the metabolic rate of cells, increasing or decreasing the amount of energy used by the cells for growth, development and functioning. This has important effects on the brain, heart, intestine, muscles as well as body temperature.

What causes thyroid dysfunction?

The most common causes of thyroid dysfunction are auto-immune disorders, where the body’s immune system attacks the cells of the thyroid gland.

When should you get your thyroid levels checked?

Sometimes, regular blood tests will include screening for thyroid disease. However, in most cases, thyroid levels are checked when a person has symptoms or their family has a history of thyroid diseases or autoimmune disease.



When you get your test done with SYNLAB, you have access to our benefits.


Customer-centric reporting

PathProvider gives you direct access to all of your test results and reports across all your devices without having to leave your home.

Benefits of being a PathProvider registered user

  • Your profile is a secure personal space
  • Access your results any time, any day, all year round
  • Results can be checked on any smartphone, computer, or tablet
  • All your previous results are archived on your profile
  • Set your notification preferences when results are ready. Choose email or SMS.
  • Not a doctor? Switch to the popular ‘graphic view’ and get to understand your results.
  • You can share or print your results directly from your profile.

Choose home collection.

Get complete convenience

Get your results as they become available online.

We come to you. Our at-home collection service is designed to save you time and is completely confidential and discreet.

You can choose to get your entire family tested in the comfort of your own home. Choose a day and a time that is convenient for you, and we’ll send one of our trained professionals to your door.

No more sitting in traffic. Now you can manage your health in the comfort of your own home.


Total confidence.

Award-winning medical diagnostics

Accuracy of results, reliability, trust, and quick turnaround time.

We have had ISO 15189 international accreditation since 2006. Our vast experience in medical diagnostics ensures that we continue to set the benchmark for reliable, accurate, and quality analysis in Nigeria.

We are audited by an external body which ensures that we implement the highest ethical standards and international best practices.

SYNLAB was awarded the 'Private Laboratory Service Provider of the Year' in Nigeria award by the Nigeria Health Excellence Awards (NHEA).

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