I always wondered if the allied forces were giving their elite troops EPO or similar when tracking the Taliban up and down mountains in Afghanistan. If they weren't, I think they should have been.

I don't know about EPO, it probably wouldn't have been that useful. But it was an open secret that a lot of the elite ground troops used illegally purchased performance enhancing steroids to build muscle and accelerate recovery. Long patrols through rough terrain while carrying a heavy load are extremely grueling and a little enhancement was tremendously helpful. Use of those drugs was technically a violation of military regulations. But officers often looked the other way because they didn't want to endanger the mission, and regular urine tests didn't check for steroids.

Now that the GWOT is over, the peacetime military has been cracking down on steroid use.

You'd think they'd have a proper programme for it for the elite troops.

Unless you're doing completely stupid doses it can be managed safely, and it's not like the soldiers are not already doing something inherently risky.