The use of such drugs is strictly prohibited in football or sport in general, but somehow Pogba seems to have broken it. I don't really expect him to do that because of the risks to his career if proven, but the career path of a footballer is very uncertain.
In the past, many Brazilian players ended up throwing away their football careers due to drinking and drug use. I don't really remember who they were, but I honestly didn't expect Pogba to end his football career in that way. Of course that would have a bad effect on him, but I wonder if that's true?
Pogba career wasn't very good after his return from Manchester United because he couldn't contribute much due to injuries and in addition to the doping case. Indeed, the use of such drugs is strictly prohibited and in fact this is quite a serious case that Pogba must accept, he could have his contract terminated by Juventus if he is truly proven to have done doping.
Juventus was hit by many cases after last season where points were deducted and this season the cases happened to their players. I think something like this will disrupt the team's performance on the field because a problem that the team continues to experience will make their players lose concentration.