In the last five years, there's been a huge push to abandon the idea that saturated fats promote heart disease. Books, magazines, podcasts, prominent newspapers, and even medical journals have spread the word that butter and meats rich in saturated fats might not only be harmless for our hearts, but may even promote health.
How did this all start? The majority of this momentum stems from two medical reports, published in 2010 and 2014, which were “meta-analyses." In other words, not new data, but rather a statistical crunching of prior studies in order to squeeze conclusions. Both of these studies have been harshly criticized for their omission and manipulation of data.
And so a lot of people have been wondering: Is butter really back?
The well-respected researchers (by the way, not known to be part of the vegan movement) began following over 125,000 nurses and health professionals in 1980 who were free of disease, and periodically assessed their diet and health. They then followed this large group for up to 30 years, a massive undertaking, and identified over 7,500 cases of new heart disease.