Key Takeaways

At-home gut microbiome tests are costly and largely unregulated

Gastroenterologists say most over-the-counter test results offer no actionable medical advice

Consumers can improve their gut health through diet and other healthy habits

WEDNESDAY, Nov. 12, 2025 (HealthDay News) — The market for at-home gut microbiome tests is booming, with companies promising insights into health, chronic illness and even longevity through intestinal bacteria.

But many gastroenterologists are urging consumers to be cautious, according to The Associated Press , as the science backing these direct-to-consumer tests is extremely limited.

The human gut is home to a complex ecosystem of microbes that aid in digestion, vitamin absorption and fighting inflammation. While research suggests a he

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