What is Known:
• Secondhand smoke (SHS) has adverse effects on health, particularly for children.
• There might be correlation between SHS exposure and heavy metal concentrations in children.
What is New:
• The levels of chromium, nickel, arsenic, and lead in girls were significantly higher than in boys.
• SHS exposure in children was correlated with increasing levels of lead and cadmium in their hair because of exposure to SHS.