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The BBC are reporting:
Toenails point to heart disease
Measuring the nicotine content in toenail clippings can help predict a woman's heart disease risk, a US study in nurses suggests.
Analysis of toenails from more than 62,500 women showed double the level of nicotine in those with heart disease than those without the condition.
The researchers said the test may be more accurate than simply asking a person about their smoking history.
It is well established that smokers have a higher risk of heart disease.
There are existing tests for the presence of nicotine in the body, for example testing the amount of nicotine breakdown products in saliva or urine, but they only reflect recent exposure to cigarette smoke.
Men and women who smoke are around twice as likely to suffer a heart attack in their life time as those who don't, and quitting smoking is one of the most effective ways to reduce this risk
Ellen Mason, cardiac nurse
Study leader, Dr Wael Al-Delaimy said because toenails grow slowly - at a rate of around 1cm a year - they may offer a longer-term estimate of a person's total exposure to tobacco smoke.
And would take into account exposure to passive smoking and smoking habits such as how much smoke a person inhales with each puff. ...
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