Yes, it is a national patent to cultivate bezoar in vitro, which is equivalent to natural bezoar and more stable than natural bezoar, so natural bezoar is based on it. Therefore, please feel free to use Angong Niuhuang Pill, which cultivates bezoar in vitro.
In addition: your grandmother's doctor is very considerate to patients. Angong Niuhuang Pill, which cultivates bezoar in vitro, is much cheaper than Angong Niuhuang Pill of natural bezoar, but the effect is just as good.