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.
Like MUFAs, PUFAs have been shown to improve cholesterol levels and reduce heart disease risk. One type is the omega-3 fatty acid, which is plentiful in some kinds of fishnot to be confused with omega-6 fatty acids, found in meats, corn oil, and soybean oil.