Common mistakes around microbiome tests include: 1) Overinterpreting results – many tests report relative abundances of bacteria but lack validated clinical risk scores. 2) Lack of standardization – different labs use 16S rRNA or shotgun metagenomics, making cross-comparisons unreliable. 3) Ignoring confounders – diet, medications, stress, and recent travel can drastically alter the microbiome, so a single snapshot is rarely representative. 4) Assuming an 'ideal' microbiome – there is no universal healthy profile; diversity is important but individual variation is normal. 5) Following direct supplement or diet recommendations without medical guidance – many commercial tests suggest interventions that are not evidence-based. 6) Neglecting clinical context – a microbiome test cannot replace diagnostic workup for conditions like IBS or IBD. Consumers should be wary of claims that a test can 'diagnose' or 'cure' diseases. Evidence level: practice (general scientific consensus).
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