Based on several years of anecdotal clinical evidence which has shown that XIGO is effective in alleviating the symptoms of the common cold-the findings of which are supported by competent and reliable evidence from in vivo and in vitro and clinical trials studies on each of the individual active ingredients of the formulation, it has been proposed that XIGO, when administered orally, has a direct stimulatory effect on multiple components of the immune system. It is proposed that this stimulation increases both the immune cell population as well as its functionality and this will be observed in cells and molecules from both the innate and adaptive responses.