• Plants: the castor oil plant contains ricin,
a small protein 1 protein
Þ 1 dead cell.
- as used by the Bulgarian secret
police.
• Animals: puffer fish contain tetrodotoxin, nerve
poison - LD50 10mg/kg Japanese eat
after preparatn , a few fatal errors reported.
• Fungal: aflatoxin Asperigillus
flavus toxin
in 1960 Turkey X disease
killed 103s of birds.
>1ppb
causes liver cancers.
• Industrial : PCBs, PAHs, pesticides, dioxin.
• Food additives :
Paracelsus 1538
‘What is it that is not a
poison? Only the dose
decides that a thing is not poisonous’.