I sleep 10 hours a night but still need to nap constantly during the day. Even 400 mg of caffeine doesn’t buzz me, it just makes me feel 70% close to my normal, high energy 20s self. My daytime fatigue is so severe I’ve been mistaken for being drunk (even though I don’t drink), and I experience a dream like brain fog around friends unless I use caffeine pills to seem present.
I know this is part of normal aging for a woman in her 30s, but it’s frustrating to constantly need naps when I haven’t even done anything. Sometimes you just have to biohack. Still, I feel a bit jealous of how men age differently and seem to keep loads of energy.

Get a real sleep study done, not just your boyfriend watching you. It has nothing to do with aging slower, but if you are so tired you get mistaken for drunk after a full nights sleep, there is absolutely something going on that you need to look into.
You can have all the normal blood tests in the world and that doesn’t mean there isn’t something wrong. It took a couple years of blood tests and scans coming out normal for doctors to find out it was cancer causing my dad’s skin rashes, they only found it because of a chest x-ray for something entirely unrelated.