A healthy immune system plays a role in the first line of defence by creating a barrier that stops invaders or antigens from entering the body. Should a virus or invader slip by a healthy immune system will respond quickly to attack the foreign substance.  It will also work to find the suitable antigen or produce the right antigen. Supplements are an excellent way to support your immune system, especially when combined with healthy lifestyle choices such as moderate exercise, eating a healthy diet, getting enough sleep and managing stress