2. Poor Quality Drinking Water
Drinking water from the tap, like 25-million other Americans, is common practice. However, scientists from the Dartmouth Medical School caution against assuming your drinking water is clean and chemical free. For instance, researchers found that water from the average U.S. city well contains arsenic, and although levels have to be deemed safe by the U.S. Environmental Protection Agency (EPA), the chemical element is believed to weaken immune response to the H1N1 virus and other strains of influenza.