There are many causes for chronic fatigue. It can be triggered by a virus, mycoplasma (Gulf war syndrome), immune system, heavy metals and hormonal imbalances. For me it was a viral origin and I was cured of chronic fatigue after taking some clove oil (very hot!) or clove spices to rid of them, well at least for me. At the time, I had to put clove oil and applied externally on feet, legs, arms and hands so they can be absorbed by the skin. After several applications at intervals of 10-15 minutes, over 5 or 6 times, the chronic fatigue was completely gone. The other is taking magnesium chloride seemed to help also.
The other is mycoplasma origin which causes chronic fatigue, in that case taking between 3-6 drops of 3% H2O2 mixed in one glass of water should help. However, it had to be taken at one hour interval several times before it can give a long term effect in ridding the body of it.
The other way to reduce the viral/bacterial/fungal causes is to alkalize. There is to ways that I found work best for me, either take 1/2 teaspoon of baking soda twice per day or take 1/4 teaspoon of baking soda plus 1/4 teaspoon of citric acid three times per day. The mix will alkalize the body increase the body's oxygen and kill the pathogens by oxidation.
If your cause of chronic fatigue is a hormonal one or possibly adrenal exhaustion issues than taking DHEA, melatonin and licorice extract, at least for me had a dramatic effect in increasing the energy levels throughout the day. Of course, you can take DHEA in the morning, melatonin in the evening and licorice extract is taken anytime, but you should not take it for longer than a week and you can stop taking it for a week alternately. Hormonal issues could also be due to insufficient thyroid at which taking seaweed and kelp would really help.
If the cause is of an immune system problem, than taking natural thymus extract would be best to restore the body's immune system to normal.
It is most important that certain chemicals used in house can cause severe hormonal disruptions, such as insecticide and fungicide which both have can either be a pseudoestrogen while fungicide is well known to destroy your body's immune system. To reduce the toxic effect of overuse of pseduoestrogen compounds found in many personal care product is to reduce such use as well as eating fresh cabbage which will counteract the effects of psuedoestorgen since cabbage can increase the body's testosterone.
Most important is to stop the use of fluoridated and chlorinated water and fluoride toothpaste which is well known to disrupt the pineal glands (fluoride accumulates here) and thyroid (chlorine competes against iodine and causes hypothyroidism).
Most of the foods you eat, in particular vegetables not organic grown has dangerously high heavy metals coming from cheap chemical fertilizers. these heavy metals can cause havoc to our entire body's delicate system. The best way is to eat organically grown vegetables without the use of chemical fertilizers and pesticides.