World journal of gastrointestinal pathophysiologySep 30, 2025

Gut bacteria as a key influence on sexual health

Gut-Brain Axis Weekly Brief ↗PubMed ↗DOI ↗

Updated Jan 20, 2026

Abstract

The gut microbiota may influence sexual health through its impact on hormonal levels and immune function.

A balanced gut microbiota supports optimal levels of sex hormones critical for sexual function and reproductive health.
Gut-derived metabolites are involved in maintaining mucosal barrier integrity and regulating immune responses essential for sexual health.
Dysbiosis, or imbalance in gut microbial composition, is associated with conditions like erectile dysfunction and reduced libido.
Lifestyle factors such as diet and stress can alter the gut microbiota, potentially affecting sexual health outcomes.
Therapeutic approaches like probiotics and fecal microbiota transplantation may restore gut balance and improve sexual health.

Simplified

The gut microbiota plays a pivotal role in human health, influencing diverse physiological processes, including those related to sexual health. Emerging evidence suggests a bidirectional relationship between the gut microbiota and sexual health, mediated by its impact on systemic inflammation, hormonal regulation, and immune function. A balanced gut microbiota supports optimal levels of sex hormones, such as estrogen and testosterone, which are critical for sexual function and reproductive health. Additionally, gut-derived metabolites such as short-chain fatty acids contribute to maintaining mucosal barrier integrity and regulating immune responses, which are essential for protecting against infections that may impair sexual health. Conversely, dysbiosis, an imbalance in gut microbial composition, has been linked to conditions such as erectile dysfunction, polycystic ovary syndrome, and reduced libido, emphasizing its role in sexual dysfunction. Lifestyle factors, including diet, stress, and antibiotic use, can modulate the gut microbiota and, consequently, sexual health outcomes. Recent therapeutic approaches, such as probiotics, prebiotics, and fecal microbiota transplantation, offer potential for restoring gut balance and improving sexual health. This review highlights the central role of the gut microbiota in sexual health, emphasizing its importance as a target for therapeutic interventions to enhance overall well-being.