katana isnt very liver toxic, which is why u can stack it nicely. but yeah good question. i got 2 containers ov var and 3 of katana. was thinking of running a beast/katana or methadrol ex/katana when my s4 runs out.. but im not sure of which, havent heard too much about methadrol yet. i acquired it in a swap for hella and seein the ingredients it looked killer. but either of them will be run with katana