Not certain if my lack of energy is due to possible adrenal fatigue (not diagnosed with) or my anemia (which is slowly improving due to diet changes, but I have tried the rhodiola and found that it gives a very quiet boost of energy. I would start at the 100 mg of the new chapter brand and see how that hits.
Also I found that this does not have a happy relationship when mixed with my allegra, so I have to choose one or the other. I did a search online and found only one indication that antihistimines may not be good to take with it and that is uncertain. All I know is I sleep like a charm when taking it alone, but when I take the allegra in same day I wake up alot at night.