I did quite a lot of reading about Rhodiola before ordering it. Many people claimed that it really helped fix their moods and made them feel happy and eliminated stress. All of that sounded pretty good, but something that all those people seemed to have in common was they were on some kind of anti-anxiety or anti-depression medication, which I am not on and don't need to be on. That was the first red flag, but I ignored it (so many people can't be wrong, right?)
I also read what WebMD had to say about it...
Rhodiola is used for many conditions, but so far, there isn’t enough scientific evidence to determine whether or not it is effective for any of them.
Red flag number two, but I went ahead and ordered my first batch (500mg veggie caps). It arrived relatively quickly and so I started having one cap with my morning coffee. After about a week I didn't notice any difference, figured maybe it took a bit of time to kick in so decided to keep at it for another week. Two weeks later and I still didn't notice any change.
At that point I decided to try taking it in the morning and evening (upping my daily dose to 1000mg), that just made the first batch run out quicker and again I saw no noticeable difference. I still wasn't ready to give up so decided to order another batch.
The second batch was a much stronger dose (1500mg) and after a couple of weeks of trying that out, I didn't feel any difference still. At that point I decided to finally give up.
About a month (maybe two) later was when my two month vacation started. That's when I noticed a difference - all the headaches, tension and stress went away, without any Rhodiola. So I would have to say that just like many herbal supplements, Rhodiola is just another one of those snake oil inventions designed to make you spend money on a hope, but doesn't actually deliver any tangible results.
So there you go, instead of looking for some kind of miracle cure, take a break, go on holiday. Rhodiola doesn't work.