Drug testing

[Dr. JK]

What anabolics do they normally test for and what determines how much they can detect?

Also, do/can they test for less known substances like: Fina, Halo, clen...???

All I know about drug testing is they detect a "toxine" and then further tests are needed to determine the exact toxine.

Can anyone else confirm and/or add to the drug testing procedure?

Thanks,
Dr JK (wish I was a lab tech)