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.
1 Polyunsaturated fat. 2  This is a type of fat found mostly in plant-based foods and oils. 3  Evidence shows that eating foods rich in polyunsaturated fats (PUFAs) improves blood cholesterol levels, which can decrease your risk of heart disease. 4  PUFAs may also help decrease the risk of type 2 diabetes. 5  Omega-3 fatty acids.