The article indicates it is tritium, hydrogen-3. Though if it was heavy water, "Poisoning would require that the victim ingest large amounts of heavy water wit

The article indicates it is tritium, hydrogen-3. Though if it was heavy water, "Poisoning would require that the victim ingest large amounts of heavy water without significant normal water intake for many days to produce any noticeable toxic effects." [0] [0] https://en.wikipedia.org/wiki/Heavy_water#Effect_on_biological_systems https://en.wikipedia.org/wiki/Heavy_water#Effect_on_biologic...