According to this article replacing saturated fats with polyunsaturated fats can cut the risk of heart disease by a fifth. That’s according to a US study carried out by The Harvard Medical School. The team analysed the findings from 8 previous studies which covered research on 13,000 people. They found that cutting down on saturated fats which are found in meat and butter could help cut the risk of heart disease. Replacing them with polyunsaturated had the opposite effect of increasing the levels of good cholesterol. In fact for every 5% increase in polyunsaturated fat consumption there was a 10% fall in heart disease.