Advanced Testosterone Androgen Index Blood Test


Advanced Testosterone Androgen Blood Test traces the amount of testosterone that is able to freely bind with bodily tissue.

Free next-day delivery
Results within 2 days
  • Testosterone
  • Free Testosterone Calc
  • SHGB
  • Albumin
Free Testosterone Blood Test
Free Testosterone Blood Test
Free Testosterone Blood Test
Advanced Testosterone Androgen Index Blood Test
Advanced Testosterone Androgen Index Blood Test
Advanced Testosterone Androgen Index Blood Test
Advanced Testosterone Androgen Index Blood Test
  • Biomarkers
  • Information


Testosterone is the main androgenic hormone that is made in the testicles. Testosterone levels are important in the regulation of male characteristics and male sexual development. 


SHGP (Sex Hormone Binding Globulin) is made in the liver. It binds to three sex hormones; DHT, testosterone and oestrogen. If SHGB levels are elevated it will directly impact the levels of free testosterone available in the body. 


Albumin is the most abundant serum protein in the blood. Albumin can bind to testosterone and can, therefore, directly impacts the free testosterone levels available. We, accordingly, test for albumin levels to accurately calculate free testosterone levels.

Free Testosterone Calc.

The majority of testosterone is bound to albumin and SHGB. With only 2 to 3% of testosterone naturally being available to cells. Our advanced Welzo free testosterone calculator measures the amounts of free unbound testosterone bioavailable in the body.

Symptoms of Low Free Testosterone Levels

Free testosterone is the amount of bioavailable testosterone levels which differs from total testosterone, which includes bound testosterone. 

Symptoms of low free testosterone levels include:

  • Poor muscular development
  • Constant fatigue
  • A potential susceptibility to obesity
  • Depression
  • Irritability
  • Erectile dysfunction
  • Reduced sex drive

Additional Insight from Dr Sameer Nakedar, MBBS, MRCGP, PGCert

Testosterone is a male sex hormone which naturally decreases with age. Abnormally low levels of this can affect sex drive, sleep, mood, muscle mass, and energy levels and cause increases in abdominal fat.

This blood test can give you a picture of the testosterone levels in your body. For males, these levels can help you understand if you have abnormal levels, which may require further assessments and treatments to help with symptoms.

Why take a Free Testosterone Blood Test?

If you've been feeling symptoms of low energy, depression, irritability, erectile dysfunction and reduced sex drive it may be due to a lack of free testosterone within the body. This test measures the available testosterone within the body to determine if your body is producing healthy levels and if further treatment is needed. 


of men maintain normal levels of testosterone into old age
According to the British Society for Sexual Medicine in a European Male Aging Study with 3000 men aged between 40-79. This number suggests that testosterone deficiency (TD) is not a condition of aging. While TD is more common among older men, it's also seen commonly in those with obesity, comorbidities, and poor health status.
of men across the UK have been diagnosed and treated for TD
Testosterone Replacement Therapy (TRT) at the Centre for Men's Health found despite 20% (2 million) of men aged over 50 suffering from TD, a few have been found and treated.
Expert’s Opinion

Experts Opinion Free Testosterone Tests

"Testosterone levels can also vary in the day at different times. Hormones work in a close network with each other. Although some may be higher in women, abnormal levels of other hormones can also impact male health."  

Dr Sameer Nakedar
Experts Opinion Free Testosterone Tests

How to Order an At-Home Test

Ordering one of our at-home tests is easy. See our video below for a full walk-through.

  • Pick your home test

    We have a wide range of tests to cover your health needs. Order with next day delivery and avoid sitting in a doctor's office or clinic. Use our quiz to find the right test for you.

  • Take your test

    Activate your test and collect your sample in the morning. Return your sample on the same day, using the prepaid shipping label provided. Samples use a simple finger prick collection method that takes around 5 minutes to complete.

  • Results within 48 hours

    You'll get GP-reviewed results and personalised recommendations to improve your results. Order now to become a healthier you!

Why Welzo
Convenient and fast
Convenient and fast

Welzo health tests are shipped straight to your address the very next day.

Secure and accurate
Secure and accurate

We are a team of doctors and scientists, making cutting edge analysis accessible.

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24/7 Customer Support

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