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Castor oil - Wikipedia
Ricin - Wikipedia
Ricin poisoning - Mayo Clinic
What Happens If I Eat Castor Beans? | Poison Control
Castor Oil: Uses and Benefits - WebMD
Ricinus - Wikipedia
CDC | Facts About Ricin
Ricin Poisoning: Causes, Symptoms, Next Steps - Healthline
Castor Oil - StatPearls - NCBI Bookshelf
Everything you need to know about ricin poison | Popular Science