Yes indeed, two lines is unfortunately a negative identification.
Our test uses gh antibody, so it is extremely accurate. The first line just shows activation/saturation. The second line is impregnated with the antibodies to gh, which will bind gh and prevent the line from forming if present. This looks like a clear negative reaction (fake).
Be careful with blood testing. Many fakes use thing like GHRPs, which will elevate serum igf-1 and thus give you a false positive. So it can be tricky. Some people are happy so long as igf-1 is up, but these gh releasing peptides are much cheaper than hgh. Something to consider.
The only thing more accurate IMO would be a lab test on the gh itself. That is 100%. But the only thing I know of that can potentially beat our test right now would be somatrem (192aa gh variant), and we haven’t seen any in years. I don’t think any labs still make somatrem since it is a very similar but earlier synthesis method. No real savings.