Hydrogenated fats

Similar term(s): trans-fatty acids, trans fats, hydrogenated oils.


Hydrogenated fats (also called trans-fatty acids) are manufactured fats created during a process called hydrogenation whereby hydrogen units are added to polyunsaturated fatty acids to prevent them from becoming rancid and to keep them solid at room temperature.

Examples of foods that contain high levels of hydrogenated fats are stick margarine, fast foods, commercial baked goods (donuts, cookies, crackers), processed foods, and fried foods.


Hydrogenated fats may be particularly dangerous for the heart and may pose a risk of developping certain cancers.

Source: GreenFacts, based on Medline Plus Trans-fatty acids 

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