👉 Polyunsaturated refers to a type of fatty acid that is not saturated but has at least one double bond between two carbon atoms. Examples of polyunsaturated fatty acids include linoleic, linolenic, and palmitic acids. These types of fatty acids are commonly found in plant-based sources such as eggs, nuts, seeds, and fish, but they can also be produced by the body from certain foodstuffs like butter and palm oil.