The gut parasite cleanse claim has been flooding my Instagram feed for months, and I have been watching it with the particular attention of someone who does not know what to believe.

The video is always structured the same way. A thumbnail of an unidentified organism. A narrator speaking in the calm, authoritative register of someone who has discovered a truth the medical establishment does not want you to have. Then the claim: ninety percent of people carry parasites in their gut. Most of them do not know it. The cure is wormwood, black walnut hull, and cloves — the so-called holy trinity of herbal antiparasitic treatment. And do not forget the binder, the narrator always says, to prevent die-off symptoms when dying parasites release heavy metals into your bloodstream.

I am not a doctor. I am also not a credulous person. But I have learned, over years of thinking seriously about systems, that the absence of institutional validation is not the same as the absence of truth. What I want to do here is something harder than dismissal and harder than belief. I want to look at what we actually know.

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