Every participant in a new pilot study had microplastics in their blood, and that's before anyone took a supplement. Then 11 people took 0.8 g/day of crayfish-derived chitosan for 15 days and saw blood plastic levels fall 26.3%, while controls didn't budge. Earlier rat work hints chitosan may gel in the gut and carry plastics out in stool. But with only 21 participants, no health outcomes and immature measurement methods, this is a promising lead rather than a proven detox. Here's what the study found, what it can't tell us, and how to think about it sensibly.
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