Are PFAS in blood tied to fewer fertile years for women?

What's actually in it

PFAS (per- and polyfluoroalkyl substances) are a group of man-made chemicals often called forever chemicals. They don't break down in the environment or your body. Instead, they build up in your blood over time. A 2026 study in Environ Sci Technol highlights that these chemicals have been present in human blood samples consistently from 2003 to 2021.

These chemicals are not just sitting in your blood. They are linked to physical changes in how your body works. A 2026 study in Env Sci Adv found that higher levels of PFAS in human serum correlate with higher levels of lipids in the blood. This shows that these chemicals can disrupt your internal health systems.

What the research says

When it comes to your reproductive years, the data is concerning. A 2026 study in Reprod Toxicol specifically looked at how these substances affect menstrual cycle characteristics in midlife women. The study used data from the Study of Women's Health Across the Nation to confirm that these chemicals are associated with changes in the cycle.

The impact of these chemicals starts early. A 2026 study in Clin Nutr found that PFAS exposure is linked to changes in adipokine levels (proteins that regulate metabolism) and eating behavior in children during their first 2 years of life. This peer-reviewed research shows that these chemicals affect the body's systems from a very young age.