Calculated Free Testosterone (CFT)

The important piece of quantitative diagnostic data is NOT the Total Testosterone, but the Calculated Free Testosterone. This value is calculated from the Total Testosterone by a variety of methods, the simplest and most reliable of which is the Nomogram, as devised by Dr Malcolm Carruthers, MD, which he has kindly allowed us to reproduce here.

Click here for the Nomogram, which you can download and print out.