first...
I believe that the person who owns the problem is one who must spend their own time doing there own reserach.
I simply repeated the position of the Wellness community on Siberian Ginseng (Russian Ginseng) ability to reduce Cortisol induced stress.
Having no background in the sciences I figured out how to research medline some 7 years ago. I know how to search for exact phrases, authors, and for journals in Medline. A person with a science background should have no problem. Ha, ... Hah, Ha!
I was researching a problem yesterday on the ability of deep breathing/ exhalation/ forced breathing to lower heart rates. I had better luck finding a relevant abstract searching Google than with Medline (since the Science people behind Medline don't have a clue as how to set up a good search engine). But, from that 1st abstract I turned up a half dozen more good abstracts on Medline.
You will still have to make your own conclusion, something that science people absolutely refuse to do. Doing so will make you a part of the Quacky Wellness Community. :)
Just thought that you might want to know. :)