Um...what 'site' ?
American Academy of Family Physicians It is an excellent site to look up direct research reports as opposed to just abstracts you get from
PubMed searches.
Re 'Black Cohosh' and many other herbs...the 'ancient' ain't necessarily good...anymore than the recent.
First: we don't have the same genetic make-up that people did when those herbs worked so well;
Well actually, we do.
"No we don't."
"Yes,... we do."
no wait, that was another thread.

Genetics change pretty darn slowly over thousands of years and there is enough genetic mixing in the population to say we're not going to be that different that fast.
Second: those herbs aren't the same as they were during those times;
Why not?
Third: maybe it might also depend on various areas of the world at these times ?
Fourth: if you want to look at homeopathic ...however it started, and many still apparently work...but although there are basics... they are inevitably changing ? 
I think the real problem in thinking these ancient cures worked so well is the human nature to see patterns where they may not always be and the 'noble savage' type of myth.
A lot of herbal remedies have reputations deduced from faulty anecdotal evidence. Where as sometimes they may have been right, ginger root for nausea in pregnancy for example, they were just as likely to have gotten it wrong, herbs around your neck did not ward off the plague.
And there is another commonly believed myth that ancient people were in tune with the environment, that they knew the plants around them and so on. Reality is disease was rampant, life expectancy short, the supposed balance with nature seems to ignore things like the extinction of the Mammoths and so on.