Why there is so little proved information on anti aging?

I have recently turned 20 and it scares the shit out of me how quickly my life flew by and how much my looks have already deteriorated. I have been looking into anti aging and all I see is some keto fag and vegan circle jerk.
What pisses me off the most about this topic is that most information is contradictory.
So I have started to do my own research and most importantly look at people around me. And other than sun exposure (less you get younger you look), I can't come up with any concrete truths.