Is it for me?
What happens after the test?Get a full doctor’s report and product advice, all at no extra charge.
Get a downloadable report from a registered doctor explaining your results
Book a free video call with our expert advisors for product tips tailored to you
Meet our expertsGet to know our in-house clinicians
Dr Leah Gorodi
Medical Lead and GP with a special interest in lifestyle medicine and health prevention
Dr Taran Toor
Chief Medical Officer, clinical entrepreneur and GP with an interest in digital health
How it works
Register your test
Receive your test and register it on our app.
Do your test
Collect your blood sample at home.
Send it back
Pop your test in the nearest priority postbox.
Get your results
View your results on the app within 48 hours.
Your privacy, guaranteedJust like your doctor, we take your privacy extremely seriously.
Your data is secure. We use the latest encryption technologies and we’re committed to our data protection responsibilities.
Your data is never sold on, rented out, or shared with third parties for financial advantage.
We work with Care Quality Commission-accredited labs and our blood test kits are all CE-marked.
You might also like
Testosterone is a sex hormone made by the testes in men and by the ovaries in women. It plays an important role in sex drive, fertility, mood and muscle mass.
Take your test in the morning between 7 a.m. and 10 a.m. This is when your testosterone levels are at their highest.
Conditions that affect your testes can cause your testosterone levels to drop, along with direct injury, infection or radiation.
Genetic conditions such as Klinefelter syndrome (when boys are born with an extra X chromosome) can also lower your testosterone levels.
Tumours, auto-immune conditions and some medications can trigger low testosterone too.
Low testosterone levels can affect fertility by causing a drop in your sperm production. They can also indirectly affect your fertility by lowering your sex drive and causing erectile dysfunction.
You generally don't need to do anything to prepare for a testosterone test.
However, sometimes you may need to stop taking medications that could affect your testosterone levels. Some medications that can artificially increase your testosterone levels include hormone therapies and steroids.
Do not stop taking any prescribed medications without speaking to your doctor first.
Signs and symptoms of low testosterone levels include:
- low sex drive
- increased breast size
- less body hair
- difficulty concentrating
- low mood and depression
- loss of muscle mass
Testosterone is a major sex hormone which has a crucial role in males. Some of testosterone's functions include:
- maintaining muscular growth and strength
- regulating sex drive
- producing sperm
- regulating bone density
Testosterone also plays a vital role in females. Small amounts of it are made in the ovaries and adrenal glands, and – when combined with oestrogen – it helps with bone health, menstrual health and sex drive.
Talk to your doctor before taking this test. Being pregnant can have a noticeable impact on your results, so make sure to check in with your GP first.
These blood tests are designed for adults aged 18 and over, and are unsuitable for children. Please note that these blood tests cannot treat or diagnose medical conditions. As Holland & Barrett don’t collect any data about your medical history, you must interpret the significance of your results with caution. Be aware that medical conditions, medications, or other aspects of your health can affect your test results. These tests do not replace seeking medical advice and assessment, and if you have an abnormal test result, you should always seek appropriate advice from a trained health professional.