Butter Increases Blood Cholesterol
High consumption of saturated fats or polyunsaturated fats does not affect the risk of cardiovascular disease— according to a large meta-analysis led by Rajiv Chowdhury from the University of Cambridge in the U.K. This startling finding contradicted mainstream nutritional advice dating back to the 1950s. You should not use this study as an excuse to pig out on ice cream and butter. Researchers from the University of Copenhagen in Denmark found that compared to olive oil, butter consumption caused small increases in blood cholesterol and LDL cholesterol (the bad cholesterol), but increased HDL (good cholesterol). People with high levels of blood cholesterol should avoid butter, but people with normal cholesterol levels can safely consume small amounts.
(American Journal of Clinical Nutrition, 102:309-315, 2015)