PFAS Are Making Adults Gain Weight
NonToxCo Research
Science & Safety Team · 4/8/2026
PFAS don't just contaminate your body. They may be making you gain weight. A new scoping review connects forever chemicals to obesity.
PFAS and Weight Gain
A 2026 scoping review in Sci Total Environ examined the association between PFAS exposure and adult overweight, obesity, and gestational weight gain. The review found evidence linking higher PFAS levels to higher body weight and excessive weight gain during pregnancy.
PFAS interfere with lipid metabolism, thyroid function, and insulin signaling, all of which control how your body stores and burns fat. They're acting as obesogens: chemicals that directly promote weight gain regardless of diet and exercise.
A Hidden Factor in the Obesity Epidemic
People blame obesity on willpower. But when environmental chemicals actively disrupt your metabolism, eating less and exercising more can only do so much. PFAS exposure has increased dramatically over the past 50 years, right alongside rising obesity rates. The review suggests the connection isn't coincidental.
What You Can Do
Reduce PFAS exposure: filter your water, avoid nonstick cookware, skip stain-resistant products, and choose unpackaged foods when possible. These steps support your metabolism while reducing your chemical burden. Browse non-toxic home essentials for PFAS-free alternatives.