Why r u lethargic?
That's the first question to answer.Thyroid problems, depressed, diabetic, over weight, sleep
isn't sound, working way too hard, poor diet
, B12 deficiency, iron
deficiency, neurologic problems
, heart problems
, muscle problems - the list is almost endless.
Unless you are very quick and accurate in finding the reason why, the best thing to do is start with your primary care physician.