Damage to fat compounds: The fatty

Damage to fat compounds: The fatty membranes surrounding the cells being the prime target to free radicals attacks. The damaged membranes then loose its ability to transport oxygen, nutrients or water to the cells.
Damage to protein molecules: Free radicals also attack the nucleic acid which comprise the genetic code within each cell. The nucleic acids function is to regulate the normal cell function, growth and also to repair the damaged tissues.
Cell damage: Damages done to the chromosoins and nucleic acids might initiate the growth of abnormal cells, which is the first step in cancer development.
Lysosomes damages: Lysosomes are little sacs in the cell that contain degenerative enzymes. The enzymes leak out when the membrane cell breaks and they start digesting the cell itself, spreading to nearby cell causing a chain reaction of destruction which, eventually, will lower the immune system resistance.