Free testosterone is the biologically active fraction that binds androgen receptors. It correlates more closely with symptom relief, libido, energy, and body composition changes than total testosterone.
High SHBG suppresses free testosterone even when total testosterone appears adequate, causing persistent hypogonadal symptoms on TRT.
Upload your bloodwork and get a full analysis of your Free Testosterone in context with your complete panel — including TRT-specific reference ranges and personalized insights.
Analyze My Bloodwork →GearCheck provides blood marker analysis and harm reduction education. Information is for educational purposes only and does not constitute medical advice. Always consult a healthcare professional.