Weight loss takes hard word and discipline. So, it’s discouraging when you lose weight only to regain weight. Of course, there are many factors that affect weight loss, but researchers at Harvard University are finding that a common substance in cookware can complicate your weight loss efforts.

Perfluoroalkyl substances (PFAS’s) are chemicals used in different kitchen accessories, including paper plates and non-stick pots and pans. In fact, they’ve been used in cookware for over 50 years.

While these kitchen pieces certainly make cooking easier and more convenient, the PFAS chemicals in some non-stick pots and pans are also associated with cancer, immunity problems, and now diet complications.

The Harvard study observed 621 overweight and obese individuals over a two-year period while they dieted. On average, participants lost about 6.4 kilograms (approximately 14 pounds) in the first six months. But over the next 18 months, individuals also regained an average of 2.7 kilograms (or, about 6 pounds).

But what this study observed is that the women who had the highest amounts of perfluoroalkul (PFAS) in their blood were the ones who regained the most weight.

And according to Harvard researchers, this unwanted weight re-gain may be because PFASs slow down the body’s metabolism, making it more difficult to burn calories as quickly as it should.

Therefore, if you’re attempting to lose weight and keep it off, you might want to look at what you’re cooking with, and not just the food you’re cooking. If you’re using non-stick cookware, it’s possible that they’re contributing to higher levels of perfluoroalkyl, which might make it more difficult for you to lose weight and keep it off.