Fasting actually Boosts the Immune System
Fasting has various effects on the immune system. Juice fasting maximizes the ability of your immune system. This immune enhancement is due to three factors.

1. The absense of the burden of digestion that demands all the resouces of the immune system.
2. Lowered plasma viscosity due to less traffic in the bloodstream (less fat, sugar, and protein).
3. Increased  nutrients assist in immune performance.

The result of fasting on the immune system is amazing, you can detoxify years of toxic built up, in the immune system due to alcohol, drug and tobacco addiction in weeks. Juice fasting can reestablish normal homeostatic balance and reduce the suffering from cravings.

Fasting Increases Immune System Processes Elevated Macrophage Activity: Macrophages engulf and destroy bacteria, viruses and other foreign substances. They can ingest worn-out or abnormal body cells. Macrophages form an important first line of defense against harmful particles that have reached the body’s interior. The body cannot function well with an overabundance of dead cells, so macrophages take on the mission of breaking down the excess.  A macrophage cell can literally detect dead cells through smell, much like a scavenger bird detects dead animals. Whenever dead cells reach the part of the bloodstream patrolled by a macrophage, the macrophages surround them and convert them into easily removed components. At the same time, the macrophage covers the dead cells with a substance known as an antigen. This action tags the cells for further attack from other types of cells in the body’s immune system. Ideally, the macrophages and killer T-cells should render both dead cells and foreign invaders harmless enough to re-enter the bloodstream for elimination. When macrophages become overwhelmed, however, they may allow some dead cells to pass through unprocessed. The DNA from those cells may trigger an inflammatory reaction as the dead cells combine with other substances. This process is the basis for many autoimmune diseases such as Crohn’s disease or lupus. Bolstering the body’s macrophages is often a course of treatment recommended for autoimmune diseases and even some forms of cancer.  Once the macrophages and other immune system components have essentially digested the body’s dead cells, the cells make their way through the bloodstream and eventually into the digestive system for final disposition. This means that the solid waste we call fecal matter is largely composed of dead cells sloughed off by the various organs and processed for elimination by macrophages. This process is dramatically increase during fasting as catabolism increases cellular breakdown to be utilized for fuel.