Does e-liquid for e- cigarettes need to have a hecsher? if not Which rebbeim/poskim say its ok? Thanks!
Yes e-cigarrettes need to have a hechsher, as it has been publicized in the name of R’ M. Shternbuch shlit”a. Please see the following link https://dinonline.org/2016/07/18/e-cigarettes-kosher/