effects of  arsenic
Symptoms of arsenic poisoning begin with headaches, confusion, severe diarrhea, and drowsiness. As the poisoning develops, convulsions and changes in fingernail pigmentation called leukonychia striata, Mees' lines, or Aldrich-Mees' lines may occur.
For example, chickens may have small amounts of inorganic arsenic-containing pesticides added to their feed to prevent infections, which can be transferred to humans through the environment or through the food supply. Drinking water can also contain small amounts of inorganic arsenic. Arsenic can affect every organ.