Weight loss helps eliminate pollutants initially stored in adipose tissue. But when it is drastic, it could temporarily have slight consequences on liver and cardiovascular function.
Fat cells are well known for storing fat, but they are also a reservoir for many pollutants. This is particularly the case for persistent organic pollutants, such as PCBs and dioxins.
Obese people, because of their excess fat mass, store a quantity of pollutants 2 to 3 times higher than thin people. A study of 70 candidates for bariatric surgery showed that massive weight loss caused the pollutants to be released into the bloodstream. This phenomenon of “destocking” allows the body to get rid of a good quantity of toxins. But they also observed that the improvement in liver and cardiovascular functions normally observed during weight loss was less significant when the release of pollutants into the blood was high.
Back to normal in a few months
Be that as it may, in the case of obesity, losing weight is and remains beneficial to health. Especially since the researchers were able to observe, after 6 to 12 months, a reduction of around 15% in the total quantity of the most common pollutants (such as PCBs) in the body. Finally, if the blood level of toxins increases, it is to be better eliminated afterwards. This “increase” is in fact only a displacement from one tissue to another, before elimination. This is one more good reason to lose excess fat.
Kim MJ: Fate and Complex Pathogenic Effects of Dioxins and Polychlorinated Biphenyls in Obese Subjects before and after Drastic Weight Loss.” Paris Descartes University, INSERM UMRS 747.