the tenderloin, which is the most tender can be removed as a separate subprimal, and cut into filet mignons, tournedos or tenderloin steaks, and roasts (such as for beef Wellington). They can also be cut bone-in to make parts of the T-bone and Porterhouse loin steaks.
I’m fairly certain it would be cocaine, since it’s much more common and is more of the stimulant.
To monitor changes to the problem. They need to be able to see the changes.