Seaweed cadmium and arsenic accumulation

The controlling scientific record is the public Heavy Metal Index synthesis, supported by 3 named anchor sources and expressed for Cadmium, Arsenic, Inorganic arsenic, Lead.

ICS does not reproduce the source extraction here. Keeping the evidence on the independent index preserves source-level methods, units, species, basis, uncertainty, and review state. This note records only the institutional consequence of that evidence.

Keep seaweed and kelp separate from terrestrial vegetables, preserve arsenic species, and require species-explicit reporting wherever inorganic arsenic is the governed analyte.

This disposition may change taxonomy, analyte coverage, test basis, surveillance priority, disclosure, or claim language. It does not allow a market occurrence percentile or a dramatic single study to become an initial certification value.

The finding is published in two additional authority layers: the HMI evidence record and the HMTc certification interpretation. Distribution should prioritize seaweed manufacturers, laboratories, retailers, regulators while preserving those distinct roles in headlines, briefings, interviews, and social posts.