Chronic arsenic exposure can impair ability of muscle to heal after injury

Chronic exposure to arsenic can lead to stem cell dysfunction that impairs muscle healing and regeneration. More than 140 million people worldwide and 4 million Americans chronically ingest arsenic in their drinking water. The 21st most abundant metal in Earth's crust, arsenic is naturally present in soil and bedrock-walled wells and has no odor, color or taste.