I don't have the info on Derma since it's not my product but needto has posted some blood test results and the findings were impressive. We did the same thing with UNLEASHED -- checking for supression of sex hormone binding globulin increases in "Free" testosterone and although results varied, there was an average of 20% increase in Free T levels. Now I know that doesn't sound as impressive as some of the outrageous claims by some companies but the difference is, one; an increase in Free T is more meaningful than total T because it's what's "useable" , and two; Protein Factory and Primordial Performance use real world results as opposed to the fabricated delusions of some of these suspect companies.