I'll give ya a bit of a yarn , I notice a lot about this sort of stuff , Now this is what I believe , You environment you live in will dictate how your body will react to microbes , In big city's or large community's you do not come in contact with local microbes or fungi on a day to day basic which in turn your body may not be able to handle it , . With Mammoth P I can't see how it would be a problem ,I can't get it here , but by mucking around in the dirt on a daily basic . I believe my body immune system is stronger for it . So I would say Mammoth P is not the problem it is you body system . We as a human race are getting far to sterile .
I may be total wrong here , I only observe what see .