Dr. McGarey author of "Oils that Heal" suggests that castor oil packs can strengthen the Peyer's Patches, which are tiny patches of lymphatic tissue in the mucosal surface of the small intestine. The Peyer's Patches produce a substance which facilitates electrical contact between the autonomous and the cerebrospinal nervous system when it reaches those areas via the bloodstream. Dr. McGarey says that the health of the entire nervous system is, to an extent, maintained through the substance produced by the Peyer's Patches when they are in good health. Although the Peyer's Patches were discovered in 1677, it is only recently that medical Science has begun to recognize them as constituents of the body's immune system.
Current research appears to confirm Dr. McGarey's theory. A double-blind study, described by Harvey Grady in a report entitled Immunomodulation through Castor Oil Packs published in a recent issue of the Journal of Naturopathic Medicine, examined lymphocyte values of 36 healthy subjects before and after topical castor oil application. This study identified castor oil as an anti-toxin, and as having impact on the lymphatic system, enhancing immunological function. The study found that castor oil pack therapy of a minimal two-hour duration produced an increase in the number of T-11 cells within a 24-hour period following treatment, with a concomitant increase in the number of total lymphocytes. This T-11 cell increase represents a general boost in the body's specific defense status, since lymphocytes actively defend the health of the body by forming antibodies against pathogens and their toxins. T-cells identify and kill viruses, fungi, bacteria, and cancer cells