Out of them:
90% of my male friends go to gym to build aesthetic bodies, it helps them attract females.
Out of them:
97% of them take whey protein, fish oil, vitamin D, creatine, withania smonifera
70% of them take anabolic steroids.
30% still end up with escorts and hookers.
That said these are my Dutch friends in Amsterdam.
So i would say very few actually go to gym for longetivity.
Particular my male friends, smoke and do drugs, they all say they wanna live a short but exciting life where they get everything they want, let it be money or girls.