Free testosterone is the unbound fraction that directly fuels muscle growth, energy, libido, and mental sharpness in men. It may provide a clearer picture of your androgen status than total testosterone alone. Your healthcare provider can help evaluate your results.
Doctor's Assessment Included
Reference ranges may vary between laboratories. When you order a test, a BIG-registered doctor assesses your personal results in context. For treatment decisions, discuss your results with your GP.
Check your own valueThis test measures the fraction of testosterone not bound to proteins like SHBG or albumin. Free testosterone represents roughly 1-3% of total testosterone but is the most biologically active form. Your healthcare provider may compare this with total testosterone for a complete picture.
For men, free testosterone is the key driver of masculine vitality, strength, and reproductive function. Even with normal total testosterone, low free testosterone could suggest your body isn't accessing enough active hormone. Discuss your results with a healthcare provider for tailored advice.
Your healthcare provider may recommend testing free testosterone when experiencing fatigue, reduced libido, muscle loss, or mood changes. It could also be useful when total testosterone is normal but symptoms persist. Consult your provider for advice on optimal testing timing.
Low free testosterone may cause symptoms despite normal total testosterone. Consider SHBG testing and consultation with an endocrinologist.
Elevated free testosterone may indicate steroid use or testicular tumors. Consult with an endocrinologist for comprehensive evaluation.
Regular resistance training, adequate sleep, stress management, and maintaining a healthy body weight may support healthy testosterone levels. Ensuring sufficient zinc and vitamin D intake could also contribute positively. Always discuss supplementation or significant lifestyle changes with your healthcare provider.
This marker is included in the following test panels.
Measure your free testosterone, the fraction your body can use directly. No referral needed.
Age-appropriate screening including testosterone and PSA.
A broad men's health panel: hormones, heart, metabolic, and organ function in one blood draw.
Total Testosterone, Free Testosterone, SHBG, and Albumin: key male hormone markers.
Comprehensive testosterone workup.
Infectious-disease screening plus male reproductive hormones for the IVF partner.
Free Testosterone
€105,-