system
Given the following post, respond as if you're commenting on Reddit:
human
Why do I, as a young person, need more sleep than older people?

E.g. my dad(50) sleeps 6 hours or less every night and is alway fit while I need 7,5+ hours to get/feel fully recovered.
gpt
Well teenagers seem to sleep a lot because your cellular metabolism hits a peak during puberty, men will go through impressive growth spurts of a few inches to over a foot in a year, women develop breast tissue and your sexual organs go through many changes as well as the chemical compositions of your brain and entire body.

Takes a lot out of you.

Once you get older this metabolism drops sharply and you have a lot less to process, and for many adulthood also means rote processes like commuting, going to work, relaxing a few hours, and sleep which is a hell of a lot less interesting compared to the physical output and mental input of a teenager/young adult.