It has been revealed that those who eat more than 20 grams of chorizo or other embutidos a day could see symptoms and in severe cases suffer a chronic obstruction to the lungs, known as Epoc. It’s thought that the cause of the problem comes from the nitrates which are added as preservatives. The warning comes from CREAL, the Centre for Research in Environmental Epidemiology, who have published their study in the European Respiratory Journal. They say that more than 18,000 people die from Epoc each year.