This video shows oxidation at work on a humble apple, yet it's the same oxidation that imperceptibly yet inexorably ages you me and the family dog.
Oxidation is caused by acids.
When we die our acids take over and we rot.
Acids and ageing are, in this sense, synonomous.
While we are on the subject, let's discuss apples.. and carrots, and mangoes and all things that make for wonderful juices.
An off-the-shelf high speed juicer is an excellent oxidiser. The heat it generates as it mecerates the fruit or vegetable kills the enzymes that keep a glass of juice alive, oxidation begins