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I found this article interesting about how the blood does it: http://kitchendoctor.com/healthconditions/parasites/blood_parasites.html
The frustrating thing about allopathic doctors not acknowledging the prevalence of parasites, is that they don't acknowledge how the blood gets rid of them either. AArgh! So there probably isn't "scientific" evidence for this, but if Ingrid Naiman is making this up, she's done a very good job of it, with the darkfield photos.
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Although I don't know about her "formulations" or protocol, everything that lady says in the link seems to agree with my data.