The Candida Immune Complex test is used by some alternative practitioners. It costs approximately $100. Labs that perform this test include Immuno Sciences, Great Smokies Diagnostic Lab, and Antibody Assay Laboratories.
There is very little scientific evidence showing that candida yeast overgrowth is common, or that diets, herbs, and supplements can help.
One clinical trial looked at the use of the antifungal drug nystatin in 116 people who were thought to have candida yeast overgrowth. After four weeks, treatment with nystatin improved symptoms compared to placebo. Some people in the study also avoided dietary sugar and yeast and reported an even greater improvement in symptoms.
Another study, involving 42 women, didn't find any benefit in symptoms with nystatin use.
Crook, WG. The Yeast Connection: A Medical Breakthrough. Jackson, Tenn., Professional Books, 1983.
Martin, Jeanne Marie and Rona, Zoltan P. The Complete Candida Yeast Guidebook. Rocklin, California:Prima Books, 1996.
Dismukes WE, Wade JS, Lee JY, et al. A randomized, double-blind trial of nystatin therapy for the candidiasis hypersensitivity syndrome. N Engl J Med. (1990) 323:1717-1723.
Santelmann H, Laerum E, Roennevig J, et al. Effectiveness of nystatin in polysymptomatic patients. A randomized, double-blind trial with nystatin versus placebo in general practice. Fam Pract. (2001) 18:258–265.