No. Our immune system is much more complex than that. Immunocal is not a magic pill. Undenatured cysteine for building up glutathione is only a part, although an essential one, of what keeps us healthier.
While Immunocal is clinically proven to raise and maintain optimal glutathione levels, high glutathione does not mean that you are immune to everything. It does mean that you will make fewer trips to the doctor, heal much faster and be less prone to illnesses.
Other components of a healthy immune system include a healthy diet that provides all co-factors of glutathione production and minimizes glutathione depleting agents; optimal vitamin D levels; low stress; at least 8 hours of restful sleep; exercising; and minimal exposure to environmental toxins.