It was developed by the ruskies for the cosmonauts. used for mental alertness and energy. I used it this last and final time I went through WD's. It did seem to help, I liked it better than other things like L-tyrosine. I still use herbs,but I ran out of the Rhodiola. energy drinks certainly helped me, along with Ibuprohin
Rhodiola does the job for me. I've found that it does indeed bring me mental clarity -- uplifts my mood a great deal! I went through a half-dozen brands, where I got a tiny taste of what it could do, but never quite enough. I am now using Mind Body & Spirit, or Verde Botanica brands, and they work very well. You'll like Rhodiola!