Versailles,
Had never heard of this before so I went to WEB MD. and they mentioned it there. Below is what I found on it.
Chronic stress can reduce levels of serotonin, which can cause depression, anxiety and carbohydrate cravings. It can result in hypertension, which can constrict blood vessels and overstress the heart. It can cause increased susceptibility to illness and infection (by lowering white blood cell counts).
It can also result in gastrointestinal problems, such as irritable bowel syndrome and leaky gut syndrome, which can adversely affect energy level, metabolism, and diet.
Hope this helps a little,
RDW