PFAS Exposure Linked to Reduced Benefits of Bariatric Surgery in teens
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Meta Description: New research reveals that higher pre-surgery levels of PFAS “forever chemicals” in teenagers undergoing bariatric surgery correlate wiht smaller improvements in blood sugar control.
Teenagers facing severe obesity who undergo bariatric surgery often experience life-changing weight loss and improved metabolic health. Though, a new study from the Keck School of Medicine at the University of Southern California suggests that exposure to environmental pollutants, specifically per- and polyfluoroalkyl substances (PFAS), may diminish these benefits. Researchers found a link between higher pre-surgery PFAS levels and smaller improvements in glucose control over a five-year period following the procedure.
The shadow of “Forever Chemicals”
PFAS are a large family of industrial chemicals used in a vast array of consumer products, including non-stick cookware and stain-resistant fabrics. Their persistence in the environment and tendency to accumulate in the human body have earned them the moniker “forever chemicals.” According to the study, most adults in the United States already have detectable levels of PFAS in their blood.
Previous research has connected PFAS exposure to a range of health problems, including kidney and liver issues, certain cancers, and potential disruptions in weight regulation and insulin sensitivity.This new work specifically investigates how these chemicals might impact the metabolic outcomes of adolescent bariatric surgery.
tracking Teen Health After Surgery
The findings are based on data from the teen Longitudinal Assessment of Bariatric Surgery (Teen LABS), a long-term study that follows adolescents through their weight loss surgery journey and tracks their health for years afterward. Researchers analyzed blood samples from 186 participants aged 19 or younger, measuring eight different PFAS compounds before surgery.
They then monitored changes in fasting glucose, HbA1c (a measure of average blood sugar), insulin levels, and estimated insulin resistance at various points up to five years post-operation. While the majority of teenagers demonstrated importent improvements in blood sugar control – indicating better insulin sensitivity and weight reduction – those with higher overall PFAS exposure experienced smaller reductions in HbA1c and fasting glucose. In some cases,these markers even began to increase again.
PFHxS: A Compound of particular Concern
One PFAS compound, perfluorohexanesulfonic acid (PFHxS), stood out as particularly strongly associated with adverse outcomes. Teens with higher PFHxS levels before surgery experienced an average yearly increase in HbA1c of approximately 0.15 percentage points. This rate of increase, researchers warn, could be enough to push someone from normal HbA1c levels into the prediabetes range, or from prediabetes into type 2 diabetes, within just a few years.
PFHxS was also linked to small but consistent increases in fasting glucose, possibly erasing initial post-surgery gains within a decade. The study did not establish clear connections between PFAS levels and insulin concentrations, but the authors emphasize the need for further inquiry in this area.
Implications for Adolescent Obesity and Diabetes Risk
These findings contribute to a growing body of evidence suggesting that environmental chemicals can subtly yet considerably influence metabolic health. Even after significant weight loss and surgical alterations to the gut,pre-existing PFAS exposure may limit the extent of blood sugar improvement some teenagers experience.
“This does not mean that bariatric surgery is ineffective for young people with severe obesity,” researchers clarified. “The procedure still brings major health benefits for most.” However, the study suggests that clinicians should consider environmental exposures when counseling patients and interpreting long-term results.
Looking ahead, screening for PFAS levels before surgery could help identify teenagers who require closer monitoring or additional interventions to maintain healthy blood sugar levels. More broadly, the research underscores the importance of policies aimed at reducing PFAS contamination in water, food, and consumer products.
