What is it? A heavy metal that becomes toxic when it builds up in the body
Where is it hiding? Old pipes and paint, gasoline, soil
how can I avoid it? Since lead most often enters the body through breathing or unintentional swallowing (with one exception: gasoline, which can travel through skin), the Mayo Clinic suggests washing hands and toys regularly, removing shoes before entering your house (to avoid tracking in soil with lead), running cold water from your pipes for a minute or so before use, and regularly cleaning dust-attracting surfaces. Houses built before 1978 may have lead-based paint so watch for peeling and crackling, which can release lead dust, according the Environmental Protection Agency.