Raw onions contain sulfur compounds that are toxic to pets.
The legend of the vampire, Dracula, may have had its basis in a very real disease known as Hereditary Porphyria.
You probably know that a brown recluse spider is poisonous. Well, brown recluse venom is both cytotoxic, meaning it can kill cells, and hemolytic, meaning it can destroy red blood cells. The extent of what this means if you’re bitten by a brown recluse varies. Learn more on this Moment of Science.
Vitamin C does a lot of good things for the body. It prevents diseases like scurvy, can lower the risk of certain forms of heart disease, and it is beneficial to people with anemia and iron deficiency.