Classically, chemical reactions encompass changes that only involve the positions of electrons in the forming and breaking of chemical bonds between atoms, with no change to the nuclei (no change to the elements present), and can often be described by a chemical equation.
Omega-3 Fatty Acids. A diet rich in PUFAs should include plenty of omega-3 fatty acids. This type of PUFA is found in cold-water fish, such as salmon, tuna, mackerel and herring.
4 Foods that Contain Polyunsaturated Fat. All foods with fats in them contain varying amounts of polyunsaturated, monounsaturated and saturated fats. Some of the more beneficial types of fats are Polyunsaturated Fats (PUFAs). These dietary fats are associated with lowering total cholesterol, called LDL or bad cholesterol.