In fact, the difference is not very big. The key to vitamins is to look at their absorption rate, and at the same time, to investigate their blood concentration and half-life. If it meets the requirements of vitamins, other active substances may be added to improve the absorption rate of vitamins. It is suggested that you take active vitamins, which have been synthesized into the active precursor form of ordinary vitamins through liver and kidney metabolism at the time of synthesis, which is more conducive to absorption and has little side effects!