It should be a very simple process.
Do not take anything that isn't given to you and/or approved by your team doctor/physio/manager/nutritionist. It doesn't matter if you have a leg amutated, you stub your toe, or you are suffering the after effects of a dodgy kebab. The protocols of what you can take and how much are the same.
If you decide to wander off the reservation and take something that you found on the internet, under your own steam, then on your own head be it. Zero tolerance if you get busted for it being "contaminated" or "mislabeled" or whatever the usual excuses are.
Bring into the fold, the lads that are on extended training panels (such as the fella up in Monaghan a couple of years ago) who may not have access to the usual intercounty protocols 24/7. If they are candidates for testing after a training session in February, then they need to be as educated and clued in as the regular starting 15.
It can't be that hard, can it?
Suppose it must be, given human nature. You can't stamp out someone going that extra mile to get that bit of edge, whatever that is You can stamp out being able to use ignorance as an excuse. The will to do so, doesn't really seem to be there.