PFAS Weakens Your Immune System's Antibody Response

Your immune system makes antibodies (IgM and IgG) to fight infections and remember pathogens. A 2026 study in Archives of Toxicology found that PFAS chemicals directly suppress antibody production in human B cells. The mechanism: PFAS activates the glucocorticoid receptor, the same pathway used by stress hormones and immunosuppressant drugs, reducing your immune system's ability to mount an antibody response.

What the Study Found

Researchers from the University of Milan and Wageningen University exposed human peripheral blood mononuclear cells (PBMCs) to PFAS and measured what happened to antibody secretion. PFAS caused decreased IgM and IgG release from B cells. RNA sequencing then identified why: PFAS activated the glucocorticoid receptor (GR) and upregulated stress-response genes.

The researchers confirmed this mechanism by blocking the glucocorticoid receptor with an antagonist drug. When the receptor was blocked, the immunosuppressive effect of PFAS was reversed. This provides strong evidence that the GR pathway is how PFAS weakens antibody production. The effect was found in both male and female donor cells.

Why This Matters for Your Health

Antibodies are how your body fights current infections and retains memory of past ones. Suppressed antibody production means slower response to infections, reduced vaccine effectiveness, and a weakened ability to clear pathogens. This might explain the repeated observation that people with higher PFAS levels have higher rates of infections and lower vaccine response.

PFAS enters the body primarily through food and food contact materials. Nonstick cookware is a direct daily source. Browse non-toxic kitchen alternatives like stainless steel and cast iron that don't use PFAS coatings, and non-toxic home essentials free of stain-resistant PFAS treatments.

Source: Iulini M, Beekmann K, Hoogenboom RLAP, Galbiati V, Russo G (2026). Arch Toxicol.