Hormones
Bioavailable Testosterone
Hormones
Measures the fraction of testosterone available for use. More clinically useful than total testosterone.
VAT-exempt medical service
Testosterone is the hormone most people associate with masculinity, but the full story is more interesting. Yes, it builds muscle, drives libido, and shapes male characteristics. But women produce it too — and it plays a real role in their energy, mood, and body composition. When testosterone drops (or spikes), the effects are hard to ignore. The tricky part? It declines gradually, so you might not notice until you test it.
Testing testosterone matters because it touches so many things: muscle growth, fat loss, athletic performance, sex drive, fertility, and mood. In men, low testosterone can cause decreased drive, erectile dysfunction, infertility, and flat energy. In women, abnormal levels can lead to irregular cycles, unwanted hair growth, weight gain, and sleep problems.
What a high value can mean
In men, high testosterone may point to testicular tumours. In boys, it's usually the driver behind early puberty. In women, elevated testosterone can indicate PCOS or an ovarian or adrenal tumour.
What a low value can mean
Low testosterone can come from ageing, heavy drinking, chronic stress, poor sleep, processed food-heavy diets, obesity, inflammation, hypothyroidism, sleep apnoea, liver cirrhosis, and chronic kidney failure. Certain medications like statins and chemotherapy can also drag it down.
Fast for 10-12 hours before the test. Go to bed at your normal time. Take the test before 10:00 am — testosterone varies throughout the day. Bring valid ID. If you take medication that doesn't need to be taken early, save it for after the blood draw. If you take a supplement containing biotin (often sold for hair and nails), pause it for two days before the test, as high doses can distort the result.
Order your test
Choose your test and pay online. Your lab referral is created straight away.
Give your sample
Visit any of our partner sampling locations. No appointment needed at most of them.
The lab analyses it
Your sample is analysed at an accredited Swedish laboratory.
Get your results
Your values appear in your account with reference ranges and an explanation of each marker.
Testosterone follows a circadian rhythm and is highest in the early morning. Testing before 10 am gives the most accurate and clinically useful snapshot.
Total testosterone counts everything — bound and unbound. Free testosterone (only 2-3% of the total) is the biologically active form your tissues can actually use. Testing SHBG alongside can help clarify the picture.
Absolutely. Quality sleep, regular strength training, stress management, maintaining a healthy weight, and cutting back on alcohol can all support healthy testosterone.