Research has made it abundantly clear that the CNS and immune system not only communicate but in fact interact and rely on each other in intricate and complex ways. It is clear that maintaining a strong immune system is vital to supporting not only brain function, but also preventing disease. By the same token, maintaining optimal brain health and proper stress management are also clearly essential to toning and aiding the immune system, and preventing any of its complex cells from becoming too numerous, or their functions going awry. Together, these two systems interact in a holistic way to keep one well throughout the lifetime. Thus it is essential not only to view this iteration through a holistic framework, but also to treat it via a holistic method or practice such as yoga, which not only supports brain health and immune function, but which serves to bolster the whole body system, for an intelligent defense against injury or disease.