Testing for Yeast Overgrowth

The most reliable test for yeast overgrowth is the test developed by Dr. William Shaw at Great Plains Laboratory. This is a urine organic acids test that measures some yeast metabolites.

The test is described in the book, Biological Treatments for Autism and PDD, by Dr. William Shaw.

The benefit of using this test is that is may confirm a yeast overgrowth or detect other metabolic problems. The disadvantage is that the test may not detect a yeast overgrowth because the test can only measure some of the metabolites of yeast, but not all of them. It is called a "false negative" when the test comes back "negative," but the person still has yeast overgrowth.

I recommend the test for people who need the benefit of measuring a yeast overgrowth for comparison over time. However, even when the test comes back negative, trying treatment for yeast symptoms still may be beneficial.

A doctor must prescribe the test. The test kit is free and is available from the Great Plains Laboratory. For more information, contact the Great Plains Laboratory, www.greatplainslaboratory.com.

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