[easy_rider]

I think he meant something in the line of sources of clinical trials etc. Nonetheless, the sources on Wikipedia suggest that they have been extensively tested in mice, like all the other stuff we take. And they do have proven use in treating Alzheimers etc. They are considered nontoxic or even neuro-protective, but in my opinion often sought out for based on reviews from first users who are mostly biased from the start and therefor easily placeboo'd. No offence :) I'd love to try them, but I'm in dubio for reasons stated above.