Margarine
Source: shutterstock.com
Margarine became popular when people saw it as a healthy alternative to butter, but recent studies have shown that it is not. Margarine is made with trans-fat which can put you at risk of developing heart disease and diabetes. The vegetable oils used in the process of making margarine have a high concentration of unsaturated fat which can generate free radicals responsible for cell damage, aging, cancer, and cardiovascular problems. The trans-fat present in margarine increase insulin levels in the blood and levels of bad cholesterol which can cause diabetes and weight gain. Other healthy alternatives to margarine are olive oil, nut oil, and coconut oil.