wann ist eine stuhlprobe unbrauchbar — what are common causes?

A stool sample becomes unusable when collection, storage, or transport deviates from protocol. Common causes include: using a non-sterile or inappropriate container, insufficient sample volume, contamination with urine or toilet water, and improper temperature (e.g., leaving at room temperature >24 h or freezing when refrigeration is required). Recent use of antibiotics, probiotics, or laxatives can also alter the microbiome profile, making results unreliable. For MyBody-X gut microbiome tests, specific requirements apply: the sample must reach the lab within 24 h, not be frozen, and be free of blood or mucus. An unusable sample yields no actionable data; retesting is recommended. This guidance is based on laboratory best practices and manufacturer instructions, not on clinical trials. If you have gastrointestinal symptoms, consult a doctor before testing.