5. Sago Palm (Cycas revoluta)
The Sago Palm is admired for its exotic, feathery appearance, but it poses one of the most severe risks among houseplants.
Every part of this plant—especially the seeds—contains cycasin, a toxin that can cause rapid liver failure in pets and severe symptoms like vomiting or seizures in children.
There have been numerous cases reported where even minimal ingestion led to emergency vet visits or hospitalization for children.
The Sago Palm’s striking look simply isn’t worth the danger in homes with curious kids or animals.