Is There an Enviornmental Link to Endometriosis?

Research published in Ginecología y Obstetricia de México (2006; 74(1):20–28) examined markers of oxidative stress and dietary antioxidant intake in 48 women with endometriosis. The investigators reported an inverse relationship between antioxidant intake and disease severity, with lower antioxidant status observed in women with endometriosis compared with healthy controls.

Additional clinical research has explored antioxidant-related markers in this population. A report published in Family Practice News (March 15, 2004) described changes in inflammatory markers among women with endometriosis receiving antioxidant supplementation, including vitamin E and vitamin C. Experimental research has also examined oxidative pathways in animal models. A study published in the Oxid Med Cell Longev. 2017:2017:7265238. suggests that oxidative stress—an imbalance between reactive oxygen species (ROS) and antioxidants—may play a role in the development of endometriosis by promoting inflammation in the peritoneal environment.

Separate lines of research have investigated environmental and chemical exposures in relation to endometriosis. Earlier studies suggested an association between endometriosis and exposure to certain persistent organic pollutants. Research published in Toxicological Sciences (2001; 59(1):147–159) found that animals with higher serum concentrations of dioxin and dioxin-like compounds had a higher prevalence and greater severity of endometriosis, with disease severity correlating with circulating toxin levels. Human studies have reported similar associations. Research appearing in Human Reproduction (2005; 20(1):279–285) examined blood levels of polychlorinated biphenyls (PCBs) in women with endometriosis and reported associations with anti-estrogenic PCB compounds. Additional findings published in Fertility and Sterility Volume 106, Issue 4p 959-966 September 15 also described relationships between body burden of PCBs and related chemicals and the incidence of endometriosis.

Taken together, these studies reflect ongoing research into oxidative stress, antioxidant status, and environmental chemical exposure in relation to endometriosis. While these findings do not establish causation, they highlight biologically plausible pathways that have been explored across clinical, observational, and experimental models.