I've seen information suggesting that the schizandra lignans may act as an AChE inhibitor. However, I've also read that it can elevate dopamine, abiet the instance where I read this involved rats, rather than humans. At a guess, I'm inclined to lean towards the former over the latter. Is there any solid evidence as to schizandra's mechanism in terms of its effects on neutotransmitters? What are some experiences people have had with this substance?