Testing Kits

Experiencing low energy, reduced muscle mass, or a dip in libido?

This test checks your total testosterone levels — the primary male sex hormone that also supports muscle strength, mood, and overall well-being in both men and women. It’s ideal for those exploring symptoms related to hormonal imbalance, fertility issues, or suspected testosterone deficiency.

• Results available within 7–10 working days

• Flexible testing options

• Tailored doctor’s report
  

• Free Delivery

What does the test include?

Hormones

Testosterone
Testosterone is the hormone responsible for male physical characteristics. In men, it plays a key role in regulating sex drive and contributes to bone density, fat distribution, muscle mass, strength, and the production of red blood cells and sperm. Testosterone is primarily produced in the testicles in men, and in smaller amounts by the ovaries in women.

Men’s testosterone levels naturally begin to decline from the age of 30, though a deficiency can occur at any age. Low levels can lead to symptoms such as reduced libido, erectile dysfunction, low energy, and difficulty building or maintaining muscle mass.

Although women produce significantly less testosterone than men, it remains important for maintaining libido, muscle and fat distribution, and red blood cell formation.

As reference ranges vary between laboratories, they are typically based on the local population. A normal range is set to include 95% of men. For consistency, we follow the guidance of the British Society for Sexual Medicine (BSSM), which recommends diagnosing low testosterone when levels are consistently below the reference range. Levels below 12 nmol/L may also be considered low, particularly in men presenting symptoms or with low free testosterone levels.

How to prepare for your test

To prepare for your Testosterone Blood Test, please follow these guidelines:

• Take your blood sample between 6am and 10am.

• Avoid using a finger that has been exposed to hormone gels, pessaries, or patches in the past four weeks. If applying these products, wear gloves.

• Do not take biotin supplements for two days before the test. If biotin is prescribed, speak to your doctor first.

Get a thorough assessment of your thyroid health with this advanced test, which includes antibody analysis. Ideal for exploring thyroid-related symptoms or monitoring autoimmune thyroid conditions.

• Results available within 7-10 working days

• Flexible testing options

• Personalised doctor's report
  

• Free delivery

What's included in the test?

Autoimmunity

Thyroglobulin Antibodies
This test detects antibodies against thyroglobulin, a protein specific to the thyroid gland. Normally, thyroglobulin does not enter the bloodstream, but if the thyroid is inflamed or under immune system attack, it may be released, allowing antibodies to be detected. Most thyroid disorders result from autoimmune conditions, where the immune system mistakenly targets the thyroid. This can lead to excessive thyroid hormone production, as seen in Graves' disease, or reduced hormone levels due to gradual destruction of thyroid cells, as in Hashimoto's thyroiditis.

Thyroid Peroxidase (TPO) Antibodies
Thyroid peroxidase (TPO) is an enzyme essential for producing thyroid hormones. This test checks for TPO antibodies, which are frequently elevated in autoimmune thyroid conditions and sometimes present in individuals without symptoms.

Thyroid Hormones

TSH (Thyroid Stimulating Hormone)
TSH is produced by the pituitary gland to regulate thyroid hormone levels. When thyroid hormone levels in the blood are low, TSH increases to stimulate hormone production. Conversely, if thyroid hormone levels are too high, TSH production decreases to slow down hormone synthesis. Abnormal TSH levels often indicate an issue with the thyroid gland, such as over- or underproduction of hormones, though pituitary disorders can also affect TSH levels.

Free T3 (Triiodothyronine)
T3 is the more active thyroid hormone responsible for regulating metabolism. Most T3 in the blood is bound to proteins, but this test measures the free (unbound) T3 that is available for use by the body.

Free T4 (Thyroxine)
T4 is one of the main thyroid hormones that influences metabolism. Most T4 is bound to carrier proteins, but only the free (unbound) T4 is biologically active, which is what this test measures. Free T4 is less active than T3 and must convert into T3 when required by the body.

How to prepare for your test

Follow these guidelines to ensure accurate results:

• Collect your sample between 6am and 10am.

• Wait at least 24 hours after taking any vitamin or mineral supplements before collecting your sample.

• Avoid biotin supplements for two days before testing (consult your doctor if biotin is prescribed).

• If you take thyroxine, continue your medication as usual, before or after the test.

• If you take desiccated thyroid extract (DTE) or liothyronine, collect your sample before taking your medication.

• If you take amiodarone or lithium, let us know in your supporting information, as these can affect thyroid function results.

Do you often feel tired, rundown, or struggle with muscle aches and pains?

You may have vitamin D deficiency, especially if you spend little time outdoors, have darker skin, or are over 65 — all factors that can affect your ability to produce vitamin D.
This vitamin D test helps determine if your levels are low, which could be contributing to symptoms like fatigue and frequent illnesses.

• Results estimated within 7-10 working days

• Convenient testing options

• Personalised doctor's report
  

• Free delivery

What's in the test?

Vitamins

• Vitamin D
  Despite its name, vitamin D is actually a hormone produced by your skin when exposed to sunlight. Before your body can use the vitamin D produced by sun exposure (known as vitamin D3), it must be converted into another form called 25 hydroxycholecalciferol (25 OH).
  Vitamin D (25 OH) is the major circulating form of vitamin D, and your vitamin D (25 OH) level is considered the most accurate indicator of vitamin D supply in your body.
• Vitamin D is essential for healthy bones and teeth, as it helps your body absorb calcium. It also plays a role in muscle health, immune function, and mental health.
• Symptoms of low vitamin D include muscle weakness, mood swings, and fatigue. Many people in the UK have low vitamin D levels, particularly those with dark skin or those who don’t spend much time outdoors.
• Small amounts of vitamin D can be obtained from food, especially oily fish, eggs, and vitamin D-fortified foods. However, if you have a vitamin D deficiency, improving your levels through food alone may not be sufficient.

How to prepare for your test

Please follow these instructions to ensure accurate results:

• Take your sample at least 24 hours after any vitamin or mineral supplements.

• Do not take biotin supplements for 2 days before your test, and discuss this with your doctor if it is prescribed.