An overgrowth in the gastrointestinal tract of the usually benign yeast (or fungus) Candida albicans has been suggested as the origin of a complex medical syndrome called chronic candidiasis, or yeast syndrome.^{1, 2}

Purported symptoms of chronic candidiasis are fatigue, allergies, immune system malfunction, depression, chemical sensitivities, and digestive disturbances.^{3, 4} Conventional medical authorities do acknowledge the existence of a chronic Candida infection that affects the whole body and is sometimes called “chronic disseminated candidiasis.“⁵ However, this universally accepted disease is both uncommon, and decidedly more narrow in scope, than the so-called Yeast Syndrome—a condition believed by some to be quite common, particularly in people with a history of long-term antibiotic use. The term “chronic candidiasis” as used in this article refers to the as yet unproven Yeast Syndrome.