First of all, I want to overturn the previous person's answer, is the medicine three poisons right, but B why to take medicine class? Do not take health care products class of it? There are B class I suggest not to take separately, it is best to take at the same time so that easy to absorb, but each vitamin every day has its highest intake, in fact, B is a very good thing, we are taking the office, nothing harmful, a day a piece of no matter.