Why am I asking this question on a Q board? Because Q people are probably a lot smarter than the other internet forums I frequent. Besides that, I don't think Q would mind anyway.

The vitamins subject is a deep rabbit hole. I don't have time to go down that rabbit hole, so I figure starting a thread and asking the Q community would be way quicker.

I've been feeling tired all the time for several weeks now. I'll throw in fatigued and lethargic too. I've got my mind made up that it's a vitamin deficiency. I think all of us could benefit from this knowledge about vitamins. I've heard that taking vitamin D3 can boost energy levels. What other vitamins are important?