Receipts made with so-called "thermal paper", which lose their impression over time, are potential causes of serious hormonal disorders.
A study carried out by the University of Granada (UGR) in Spain revealed that a high percentage of purchase "tickets" contain substances that may be the cause of diseases of a hormonal nature, such as genitourinary malformations, infertility, obesity and cancer, in particular of breast.
According to the researchers, most tickets or receipts, which "are made with the so-called thermal paper, contain bisphenol-A (BPA), a known endocrine disrupter that changes hormone balance in exposed people "and leads to the diseases mentioned.
The research was also attended by experts from the Institute of Research of Biosanitary of Granada (ibs.GRANADA), Hospital Universitario San Cecilio of Granada; the Université Paris Descartes and the Necker Enfants Malades Hospital in Paris (France), and the National School of Public Health in Rio de Janeiro (Brazil).
The researchers studied 112 tickets from the three countries they came from. Nicolás Olea, a professor of medicine at UGR, explained that they are "receipts that lose printed matter over time" and that "often all you find is a fine white powder that comes out when you remove it from the bag or pouch ". This powder, he said, is exactly BPA.
"We can recognize this type of paper because if we approach a source of heat, for example, a match, it is darkened instantly," adds the researcher.
Do not collect food tickets
According to the study, 90% of the revenues collected in Spain and Brazil contain GAP; while in the case of France only half, due to the fact that measures have been taken since 2014, according to the Report21.
"The bad thing is that the French alternative seems to be BPS (bisphenol-S), which we find mainly in the recipes from that country and rarely in the Spanish and Brazilian," says Olea, adding that this other compound "is also an endocrine disruptor, greater environmental persistence and, therefore, can not be a valid option ".
While they expect regulatory action to be taken, the researchers recommend not mixing food tickets and not "playing with them, or wrinkling them to play them, write notes or store them in the car, purse or purse," said the researcher.
"We need to handle this kind of ticket as little as possible," he says.