Small Intestinal Bacterial Overgrowth (SIBO) falls under the Gut Health category.

Evidence-based

Small Intestinal Bacterial Overgrowth (SIBO)

Fact-checked by:

Kamal Patel, Nick Milazzo

•Last Updated: November 20, 2025

Small intestinal bacterial overgrowth (SIBO) refers to an abnormal amount of bacteria in the small intestine. The exact causes are unknown, and diagnosis can be challenging because SIBO shares symptoms with several other diseases. SIBO can be treated with antibiotics, and certain probiotics may enhance their efficacy.

Fact-checked by:

Last Updated:November 20, 2025

Overview

What is SIBO?

What are the main signs and symptoms of SIBO?

How is SIBO diagnosed?

What are some of the main medical treatments for SIBO?

Have any supplements been studied for SIBO?

How could diet affect SIBO?

What causes SIBO?

Research FeedRead all studies

Frequently Asked Questions

How is SIBO different from SIFO?

What causes the symptoms of SIBO?

How do tests for SIBO work?

How is hydrogen-positive SIBO different from methane-positive SIBO?

What factors influence the accuracy of breath tests?

How do medical treatments for SIBO work?

What other conditions are associated with an increased risk of SIBO?

References