Researchers from the University of Linkoping in Sweden found that children who smoke their parents outside the places where they have children have a nicotine proportion in their bodies twice as many as non-smokers.
But the proportion of nicotine in these children is much lower than children who are directly exposed to cigarette smoke.
Experts said the best way to protect children is to never smoke.
The researchers reviewed studies on the effects of secondhand smoke.
A study of urine samples tested 366 children aged 2 to 3 years to detect cotinine, a substance formed when the body breaks down nicotine.
Of the 366 children surveyed, 216 were trying to smoke outside their children.
The study showed that the proportion of cotinine in children who smoke their parents abroad is twice that of non-smokers.
But in homes where adults smoke, the proportion of cotinine in their children was 15 times higher than that of nonsmokers.
A separate study of 1,600 children aged 1 to 2 found a link between passive smoking and respiratory diseases in children.
The researchers also found that parents realize that passive smoking can harm their children but they do not know why.
They said relatively few people quit smoking when they had children, but many actually changed their smoking style.
"Health care workers tend to avoid being charged, but they may sometimes be very cautious," said public health researcher Anakarin Johansson, who conducted the study.
"Seventeen children under the age of five are admitted to hospitals every year in the UK because of secondhand smoke," said Naj Dilafi, a researcher at the Action Health and Anti-Smoking Group of the BBC News Online. "Although parents smoke outside Where children are concerned for the health of their children, but exposure to accidental cigarette smoke is still happening."
But the proportion of nicotine in these children is much lower than children who are directly exposed to cigarette smoke.
Experts said the best way to protect children is to never smoke.
The researchers reviewed studies on the effects of secondhand smoke.
A study of urine samples tested 366 children aged 2 to 3 years to detect cotinine, a substance formed when the body breaks down nicotine.
Of the 366 children surveyed, 216 were trying to smoke outside their children.
The study showed that the proportion of cotinine in children who smoke their parents abroad is twice that of non-smokers.
But in homes where adults smoke, the proportion of cotinine in their children was 15 times higher than that of nonsmokers.
A separate study of 1,600 children aged 1 to 2 found a link between passive smoking and respiratory diseases in children.
The researchers also found that parents realize that passive smoking can harm their children but they do not know why.
They said relatively few people quit smoking when they had children, but many actually changed their smoking style.
"Health care workers tend to avoid being charged, but they may sometimes be very cautious," said public health researcher Anakarin Johansson, who conducted the study.
"Seventeen children under the age of five are admitted to hospitals every year in the UK because of secondhand smoke," said Naj Dilafi, a researcher at the Action Health and Anti-Smoking Group of the BBC News Online. "Although parents smoke outside Where children are concerned for the health of their children, but exposure to accidental cigarette smoke is still happening."
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