The butter-margarine debate is not a new one. People believed we found a healthier alternative to butter when margarine came along. After all, the majority of margarines contain healthy fats (mono- and poly-unsaturated fatty acids) and no cholesterol because they're made from vegetable oil, compared to butter which contains higher amounts of cholesterol and saturated (bad) fat. But then we discovered margarines contained trans fatty acids and all bets were off.
So what's the consensus today?