It's become the most vilified food of modern times: red meat, particularly the type you buy in a packet. According to the World Health Organisation, processed red meat like bacon, ham and sausages definitely causes cancer due to toxic additives in the products. But I will put my reputation as a diet expert on the line to say, with confidence, that not all processed red meat is bad for you. Demand for sliced, processed ham among UK supermarket shoppers is fallingIs a ham sandwich really healthy? I wouldn't eat a ham sandwich every day, but that is true for all foods; studies show the healthiest diets are the most varied.