What impact do anti-fungals have on Microbiome Explorer test results?

Antifungal use can influence the gut microbiome, though the evidence base is more limited than it is for antibiotics. Research suggests antifungals may alter bacterial composition, so to reduce interference we recommend waiting four weeks after completing antifungal treatment before collecting a sample.
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Topical antifungals such as Nystatin — Nilstat or Mycostatin — are unlikely to impact results, since they aren't ingested and don't reach the digestive tract.