Many foods are known to have a toxic element to them, including rhubarb, Raw Beans or Phytohaemagglutinin poisoning, and Green Potatoes. Toad Skins can be poisonous, and Honey produced from Rohdodendrons. Wheat can be affected by Karnal Bunt or Aflatoxins poisoning. Refined Canola Oil is reputed to cause problems. Histamine poisoning can occur from food. Poisonous Mushrooms are a well known threat. A list of Toxic and Non-Toxic plants can be a guide. Poisonous sea algae causing Red Tide are a form of Ciguatera algae. Mussels or other Shellfish or Pufferfish can be fatal.