14. Hydrogenated Oils

Hydrogenated oils are vegetable oils that cannot be extracted naturally. Therefore, they are treated with chemicals to separate the oils from the source. Afterward, they are often colored and deodorized in order to make them look appealing.

As a result, such oils contain large quantities of Omega-6 fatty acids, which are known to be the cause of heart disease and many cancers (skin cancer in particular).