" So many modern diseases, including heart disease, depression, cancer, Alzheimer’s, and all the autoimmune diseases (such as rheumatoid arthritis and lupus), occur in part because our body’s immune systems produce excess chronic inflammation. In chronic inflammation, the immune system stays on too long and may even begin to attack the body’s own tissues, as though they were outside invaders. The causes of chronic inflammation are many, including diet and, of course, the countless chemical toxins that become embedded in the body. Chronically inflamed bodies produce chemicals, called pro-inflammatory cytokines, which contribute to pain and inflammation. "

― Norman Doidge , The Brain's Way of Healing: Remarkable Discoveries and Recoveries from the Frontiers of Neuroplasticity