IRON, A HEAVY METAL, is the most abundant trace mineral in the body. Although iron is essen- tial for the transport of oxygen, the presence of excess iron in the blood can lead to iron toxicosis. The most common cause of iron overdose is accidental ingestion of iron-containing compounds; however, iatrogenic overdose via injection of agents to treat iron deficiency (e.g., iron dextran complex) is possible. Iron-containing agents that animals may accidentally ingest include multivitamins, birth controlpills, fertilizers, and chemical hand and foot warmers.
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