It is not only the foods you eat that determine your well-being. It is also the way your body uses these nutrients for good or ill. that's where stress comes in. The concept of stress is very prominent in modern society. We often hear people remark, 'I'm so stressed' or 'My problem is too much stress.' Indeed it is true that unbridled stress in reactions are associated with many illnesses. Few people realise, though, that it is not the stress itself but our reaction to the stress in our environment that depletes our immune systems and leads to illness. This reaction is as old as human history. It is caused by a natural chemical response to the perception of danger. The best way to describe the stress reaction is to get a mental picture of how the body responds to stress.