The environment of a being defined as human is the human body. The beliefs with which we define ourselves will also define the environment and what we are in it. Dynamic memory response in the energetic re-generation of a perception pattern. It is something like an airplane putting out an identifying blip-echo for the benefit of a ground radar.
Free radicals seem to be biochemically the root cause of every body deterioration.
Vitamin C and E for example, soak out of the tissues the free radicals that have been left in it.