Is it the vitamin K in the nattokinase or something else that does you all the good?
For example there are supplements that say nattokinase. Is that sufficient or do you have to buy fermented soy. (so its likely the bacteria in the nattokinase that is so helpful.)
The food natto has vitamin K in it, but nattokinase sold as a supplement generally does not. Nattokinase by itself is very healthy for the cardiovascular system, even apart from its ability to degrade the toxic spike protein https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6043915/ .