This has probably been mentioned somewhere but I mentioned to my physician that I was experiencing the same stuff and she told me vitamin b12 (on top of vitamin D that I was taking). She said don’t worry about the amount because you just piss out the excess. Going to bed earlier, wear a weighted eye mask helps with staying asleep. Finally, go to the dentist and check if you have mild periodontal disease. If you don’t take care of your gums what happens is bacteria will seep through them directly into your bloodstream making you perpetually tired. They will lift under your gums to clean them and it helps a ton

With both those supplements + the weighted eye mask (I also use a watch to help gamify my sleep habits) + that under gum cleaning I stopped getting gray hairs, I no longer need to nap every day (i don’t need to nap at all anymore in fact) + I have more energy. I don’t even exercise really because I’m super lazy but those have made a significant difference in my day to day. Compared to 2 years ago I feel like a completely different person from 2 simple supplements, a single visit to the dentist (floss of course going forward) and an eye mask (weighted is really important)