According to them it's because it is easily accessible and has multiple strains of bacteria in it (they were not trying to go for one strain in particular).
1 : chapter "Study intervention" of https://www.nature.com/articles/s41398-022-01977-z
According to them it's because it is easily accessible and has multiple strains of bacteria in it (they were not trying to go for one strain in particular).
1 : chapter "Study intervention" of https://www.nature.com/articles/s41398-022-01977-z