Candida albicans is a naturally occuring organism which lives in the intestines. When the body becomes too acid, or becomes toxic because of effete matter congested in the bowel, candida albicans can overgrow. This tips the delicate balance of intestinal flora so that the favourable organisms get outnumbered, with candida albicans dominating the field. See Merrilyn's post: http://merrilynhope.com/roundup-herbicide-causes-severe-candidiasis/ Candida can also take over when the immune system has been shocked. Emotional shock, or environmental shock such as sudden exposure to harmful chemicals, or radiation from  X rays, can weaken the immune system drastically and kill off the organisms which we need in order to digest food properly. On-going ...