I too suggest the B-vitamins, B-6, and B-12 specifically are for energy, as well as the omegas.
There are other causes to feeling tired, among them, dehydration, CFS, anemia, hypoglycemia, and low thyroid function.
Anemia is either a b-12 deficiency, or an iron deficiency. You shouldn't take iron unless confirmed by a doctor. B12 is best taken in sublingual form, may also be administered intravenously. Dependant on the level of fatigue, this may be necessary for a while.
One of the main symptoms of CFS, and fibromalgia, are restless sleep. Current research suggests an underlying infection, as the cause. Can be viral, bacterial, microbial, or fungal. Can be confirmed with a simple blood test.
Other symptoms of low thyroid function include, being cold, dry skin, coarse, thinning hair, edema, weight changes, as well as fatigue. Can be confirmed with a TSH. A simple blood test.
If the fatigue continues, or is extreme, I would seek the help of a physician, to rule out any underlying illness.
In the meantime, increase your water intake, protein and good fats, cut back on simple carbs, (known to cause fatigue) and take a good multi vitamin, with a b-complex. B vitamins work together, it is best to take in a complex formula.
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