I find kratom in moderation to be beneficial. Ive used it as much as 2-3 times a day for 8 or so months now. Currently I limit myself to once a day, usually before work.
It has some remarkable medicinal properties. That given, it can affect you psychologically if you find yourself depending on it. It can dehydrate you due to its diuretic properties. There's many factors surrounding kratom's benefits.
Another thing, for the unfamiliarized, therer are 4 main strains of Kratom. Bali & Indo (more sedating, relaxing), and Thai and Malaysian (this is stimulating, Malaysian is a more balanced mix of alkaloids providing stimulating and sedating effects.)
Just because it's not marketed by big pharm, I would not dismiss kratoms benefits. In moderation
, it can be helpful against anxiety, stress, even sickness such as the flu (although kratom should not be your ONLY relief, it just helps to provide comfort).
Anyway, theres a whole forum dedicated to kratom (kratomforum). For those interested, I suggest you go and do some reading. I also suggest staying away from extracts unless you just looking to get a buzz. If you stick to plain leaf crushed or ground, youll find yourself hardly affected by tolerance or withdrawals.
Just my two cents.