Especially when you consider Jackman is fucking 55 years old. In the pic in the left from 20 years ago, he's too old to look like the pic on the right.
It's just testosterone and trebolone, plus maybe a very short run of oral superdrol. Couple that with a ten week cut and some diuretics plus simple carbs just before filming. Six months bulking, three months cutting, every meal calorie counted and tracking macros. Still very hard on your body and requires more or less constantly thinking about.
Honestly, I'm not convinced. I know why people take it, but I genuinely think it's because of the name. There's a school of thought that says bodybuilders truly "exploded" in size when HGH came onto the scene, but I think it's more likely this change was due to insulin abuse. Some people say it makes their skin, hair and nails nice, and perhaps helps them lean down better around the middle. But I mostly hear people saying it is very underwhelming, not worth the money, and gives them carpal tunnel syndrome.
I thought that was the joke of the movie. That his abs are fake. Because they looked so super oiled up and fake. I don't even see why not. They can only maintain that kind of physique for a day of shooting or so.
I don't know if it'd be healthier if the guys getting superhero bodies just said it was done to drugs (like Tom Hardy), plus having a personal doctor, trainer and chef - just something that is unattainable for most people and unwise. As I imagine it's a contributor to the problems with men's mental health.
You also have to wonder about the actor's long-term health as things like HGH are really risky and diuretics can really put a strain on your system. If I was in the current generation of superhero actors, I'd be keeping a close eye on the first generation of musclemen, action heroes. It may be, with Hollywood money, you get regular checks to spot problems early and avoid the fate of a lot of the bodybuilders and wrestlers in their generation.