I posted a longer post about this but it vanished...My main point was that vacha is not approved for human consumption by the FDA. That probably explains why you can't order Mentat on the Himalaya site for the USA. You can get the other product at Whole Foods or there is an alternative at Banyan Botanicals.

I will rewrite some of the other stuff I wrote about ayurvedic herbs for PD after I see if this post goes!

Kim