Regular use of cleaning sprays can have as much of an impact on health as smoking a pack of cigarettes a day, according to a new study.

Scientists at Norway’s University of Bergen tracked 6,000 people, with an average age of 34 at the time of enrolment in the study, who used the cleaning products over a period of two decades. According to the study, they found that lung function and capacity declined in women who regularly used the products.