Doctor's Assessment Included
Every result includes a professional assessment from a BIG-registered doctor. For treatment decisions, discuss your results with your GP.
Free Testosterone
Free testosterone is the bioavailable fraction important for women's energy, mood, libido, and muscle tone. While present in smaller amounts than in men, balanced levels support overall wellbeing. Your healthcare provider can help interpret what your free testosterone means for your health.
Reference Ranges
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.
What It Measures
This 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.
Why It Matters
In women, free testosterone supports bone density, lean muscle, and sexual wellbeing. Elevated levels could suggest conditions like PCOS, while low levels may indicate decreased vitality. Tracking this marker with your healthcare provider may help manage cycle-related or menopausal concerns.
When to Test
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.
Symptoms
Low Levels
High Levels
Recommendations
Female
Low free testosterone may cause decreased libido and energy. Consider comprehensive hormone evaluation with an endocrinologist.
High free testosterone may indicate PCOS or adrenal disorders. Consider evaluation for PCOS and lifestyle modifications including weight management.
Lifestyle Tips
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.