Chemicals known as perfluoroalkyl substances (PFAS)—used frequently in fast-food wrappers and other products for their oil- and water-repellant properties—have been linked to hormone disruption, immune dysfunction, high cholesterol and even cancer. Now, a new study suggests that exposure to the chemicals could make it harder to keep weight off after dieting.
The study, published in PLOS Medicine, found that levels of PFAS in the blood were linked to greater weight gain in a group of people who had recently shed pounds, especially among the women. Another finding may hint at why: People with higher blood levels of PFAS also had lower resting metabolic rate, meaning they burned fewer calories during normal daily activities.
Excerpted from Time