The thymus gland, the master organ of the immune system, produces T cells, key defenders of your health. As we age the thymus gland shrinks, leaving only the remnants of thymic protein stimulation. The single protein contained in ProHealth Longevity ThymusPro supports thymus activity by increasing the production of T4 lymphocytes. Until recently, the idea of oral administration of proteins has been excluded, because large polypeptides would be digested and unabsorbed. Because ThymusPro is taken sublingually, the degradation of the protein in the stomach is avoided. Furthermore, large proteins can be absorbed intact across oral mucous membranes.