If you all would just listen to me-
1000mcg's B12 soon as you get up, B100 complex after lunch, Iron if you need it, Testosterone if you're low. And that only works if YOU do the work pushing yourself more every week till you build endurance.
DIET- Hopefully all know fatty foods such as potato chips ROB energy & has been proven. PROTEIN is a must I don't care how you get it.
If you buy prepackaged food, lowest salt highest protein works for me. I never look at calories.

If all above fails, buy a pusle/ox meter online for $35 like my neuro's office has as do I, and see if your oxygen's low. Adderall is precription speed if needed.