Eating fast food three times a week may lead to asthma and eczema in children, say researchers who have looked at global disease and dietary patterns.
Data from more than 500,000 children in more than 50 countries suggests poor diet may be to blame for rising levels of these allergy-related conditions.
Those who ate fast food, such as take-away burgers, risked severe asthma, eczema and itchy, watery eyes.
Eating plenty of fruit appears to be protective, Thorax journal reports.
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