It is a manifestation of the breeding of miscellaneous bacteria. Self-made enzymes have many uncontrollable components, which are easy to produce methanol and toxic. Moreover, the weight of enzyme is numerous, and it is not so easy to extract it. Caution. It's not easy to sell. Many of them are lies.

Let's just say that the function of oral enzymes has not been scientifically proved at all. At present, it is the propaganda of some small businesses. Not credible.