Chemicals in nonstick pans could be causing weight gain, study says Researchers from Harvard University recently conducted a study to determine how using nonstick pans can interfere with weight loss. They examined 621 overweight individuals who participated in a six-month weight loss plan. After 18 months, they found that the dieters had gained back nearly half the weight they lost. People with the highest levels of perfluoroalkyl substances (PFAS), especially women, had gained the most weight. PFAS a