Avoid trans fats, found largely in commercially prepared baked and fried foods, These fats not only raise “bad” LDL cholesterol, but also lower levels of heart-healthy HDL cholesterol. High trans-fat intake has been linked to coronary heart disease, in which fatty plaques build up in the heart arteries, sometimes leading to a heart attack.
The food industry has been widely replacing trans fats with interesterified fat, another unnatural fat to completely avoid.
The interesterification process hardens fat, similar to the hydrogenation process, but without producing oils that contain trans fats. The end product, like trans fat, is less likely to go rancid and is stable enough to use to fry foods.
However, like hydrogenation which generates unnatural trans fats, interesterification also produces molecules that do not exist in nature.
Studies show that interesterified fat raises your blood glucose and depresses insulin production. These conditions are common precursors to diabetes, and can present an even more immediate danger if you already have the disease (Nutrition & Metabolism 2007, 4:3doi:10.1186/1743-7075-4-3)
Editor’s Note: Stay with healthy fats such as olive oil, and even saturated fats in moderation such as butter or coconut oil.
To round out your healthy fat intake, be sure to eat raw fats, such as those from avocados, raw dairy products, and olive oil, and also take a high-quality source of animal-based omega-3 fat, or if vegetarian, supplement with Krill oil.