Fat
Butter, lard, coconut oil—the fear of saturated fats has fallen since heart experts realized that the trans fats in margarine were actually deadly. But that doesn’t mean saturated fat is off the hook: The New York Times reports that in spite of trendy diet advice (and wishful thinking), saturated fat can still contribute to heart attacks. People who replace saturated fat with olive or canola oil significantly cut their risk of cardiovascular disease.