So each manufacturer is responsible for creating their own.
Some use UNITS
Some use SUNITS
The bottom line is that the marketing department of the company make up the numbers and they have nothing to with anything.
The original studies of serrapeptase performed in Japan were performed using the formula that we sell.
Here is why I think we sell the most powerful serrapeptase product that is available:
1) Over the years we have personally tried most every new product that comes on the market, never found one that works better.
2) If you exceed the recommended maximum dosage of 2 - 5 mg tablets three times per day, the side effects can include dry mouth and or you may not be able to produce a good spit.