We can now support natural immune defenses through the introduction of ProImmune's, Immune Formulation 200® to the system in a daily fashion. This product has been granted U.S. Patent RE 39734, underscoring its unique composition, nutrient selection, quality and immune-support potential.* With Dr. Crum’s extensive background in chemistry as an undergraduate and later at the Harvard Medical School, he was intrigued by what was observed clinically and what was going on in the body biochemically. He realized that glutathione was a pivotal molecule in the preservation and restoration of the immune system. He felt the approach should be to find a way of restoring the glutathione molecule intracellularly... he felt the best way was to allow the cell to carry out its natural function for which it had been evolved and perfected, namely synthesis of the glutathione molecule with specific enzymes et al. Dr. Crum felt that with the rapid turnover of glutathione, the most important way to achieve the physiological goal would be to facilitate and augment intracellular synthesis, which mechanism had already been highly perfected by years of evolution. Intracellular synthesis presented crucial and highly sensitive problems, because the most crucial entity cysteine could not be delivered into the cell per se. Dr. Crum’s invention foresaw cystine as being the primary systemic carrier of cysteine, hence this coupling’s being the reason why cystine could function as the primary carrier of cysteine. Dr. Crum’s patent is also an economic avenue for replenishment of bodily glutathione.*