Chemical x Dictionary

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What is Hydrogenated or Partially Hydrogenated Oil ?

Hydrogenated or partially hydrogenated oil undergoes a transformative process by adding hydrogen to liquid fat, turning it into a solid form. Widely identified as trans fats, this ingredient not only alters the texture of foods but also acts as an economical means to enhance their shelf life, ensuring prolonged freshness and stability on the market. It serves as a versatile tool in the food industry, offering both structural benefits and cost-effective preservation, influencing the characteristics and longevity of an array of food items.

What are the other names this ingredient is also known as? 

Hydrogenated oil can appear on ingredient lists under various names, including-  Partially hydrogenated oil, Fully hydrogenated oil, Hydrogenation, Trans fats. These terms indicate different levels of hydrogenation and are associated with the process of converting liquid oils into solid fats. It’s crucial to be aware of these names when scrutinizing food labels for the presence of this particular ingredient, especially considering the health implications associated with trans fats.

What products is it used in? 

You will find this ingredient in commercial baked goods like cookies, cakes, and pies; popcorn; frozen foods such as pizza and nuggets; fried items like fries and doughnuts; non dairy coffee creamers, and many more products that require oil to seal the taste and increase their shelf-life.

What is the source of this ingredient?

Hydrogenated oil is a form of oil that has undergone a chemical process called hydrogenation. This process involves the addition of hydrogen to liquid oils to make them solid at room temperature. While the oil itself may be derived from natural sources, the hydrogenation process is a synthetic one. Hydrogenated oil can be either vegan or vegetarian, depending on the source of the oil. If the oil is derived from plant sources, it is considered vegan and vegetarian. However, if it is derived from animal fats, it would not be suitable for those following a vegan or vegetarian diet. Always check product labels or contact the manufacturer for specific information on the source of this ingredient. 

Why is it bad?

Hydrogenated or partially hydrogenated oil contain trans fats. Trans fasts can potentially raise LDL/bad cholesterol and reduce HDL/good cholesterol

What should I do?

Avoid at all costs.


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