Researchers Examine Impact of Lifestyle Factors on Female Microbiome Composition and Function

A comprehensive review published in Microbial Ecology highlights how modifiable lifestyle behaviors significantly influence the female microbiome across multiple body sites. The analysis examined factors such as diet, smoking, alcohol use, obesity, stress, physical activity, and hygiene, showing that these behaviors can alter microbial diversity and function, with important implications for women’s health.

Emerging evidence confirms that women exhibit unique microbial patterns, largely influenced by hormonal fluctuations.

In the vaginal microbiome, dominance of Lactobacillus is considered a hallmark of a healthy state, while imbalance—known as dysbiosis—is linked to conditions such as Pelvic Inflammatory Disease, sexually transmitted infections, endometriosis, and preterm birth.

The review synthesized findings across four major microbiome sites: vaginal, gut, oral, and skin. Diet emerged as a key factor, with high-fiber intake associated with beneficial microbial profiles and reduced risk of bacterial vaginosis.

These effects may be mediated through short-chain fatty acids and hormonal regulation. In contrast, alcohol consumption and smoking were linked to reduced Lactobacillus levels and increased microbial imbalance.

Obesity also showed strong associations with microbiome disruption, including unfavorable bacterial shifts in both gut and vaginal environments. Hygiene practices, particularly the use of vaginal cleaning products, were associated with a higher risk of infections such as urinary tract infections. Stress was identified as another important factor, potentially disrupting microbial balance through hormonal pathways involving cortisol.

Overall, the findings emphasize that lifestyle choices play a crucial role in shaping the female microbiome. Positive behaviors like healthy diet and physical activity may support microbial balance, while harmful habits can promote dysbiosis.

REFERENCE: M. Davidson, I., Nikbakht, E., M. O’Neill, H. et al. Shaping the Female Microbiome: A Review of Lifestyle Factors Influencing the Vaginal, Gut, Oral, and Skin Microenvironments. Microb Ecol (2026). DOI: 10.1007/s00248-026-02747-w, https://link.springer.com/article/10.1007/s00248-026-02747-w