Is Butter Bad for You? The Real Benefits of Real Butter

For decades, people ate butter with nearly every meal, smeared on bread with fresh (homemade) jam or slathered over (non-GMO) corn. But in the 1920s when margarine made its debut, things changed for the creamy topper. We were quite literally sold on the benefits of this man-made chemical storm competitor, and only later would we figure out that it contained something called trans fats—far more dangerous than the saturated fats it chased us away from.