Teens with higher blood levels of PFAS regain more weight after bariatric surgery, study finds

Adolescents who bear bariatric surgical procedure face the next threat of weight regain, which might undermine remedy success and long-term well being, if they’ve elevated blood ranges of per- and polyfluoroalkyl substances (PFAS) previous to the process, in accordance with new USC analysis.

PFAS are manufactured chemical compounds utilized in consumer products that accumulate within the physique over time and are more and more linked to a variety of well being considerations, together with kidney problems, liver damage and various cancers.

The findings are revealed within the journal Obesity.

Bariatric surgical procedure, a type of weight-loss surgical procedure that alters the digestive system, is an efficient remedy for extreme weight problems that may cut back the chance of long-term well being issues akin to sort 2 diabetes and heart problems. However many individuals who get bariatric surgical procedure regain vital weight over time, which might restrict the process’s long-term health advantages.

Researchers imagine PFAS publicity might play a task in weight regain as a result of the chemical compounds are identified to disrupt endocrine and metabolic processes.

“With the rising use of weight reduction interventions world wide, it’s vital for us to know the affiliation between PFAS and profitable weight reduction administration, together with what this implies for long-term outcomes,” stated Brittney Baumert, Ph.D., MPH, a postdoctoral analysis fellow in inhabitants and public health sciences on the Keck Faculty of Medication of USC and the examine’s first creator.

Baumert and her colleagues carried out the primary long-term examine linking PFAS publicity to bariatric surgical procedure outcomes in teenagers. They tracked 186 adolescents for 5 years, discovering that these with greater PFAS blood levels earlier than surgical procedure regained extra weight and had larger will increase in waist circumference than these with decrease PFAS ranges.

The strongest associations had been noticed in a category of PFAS often known as sulfonic acids, which incorporates perfluorooctanesulfonic acid (PFOS), perfluorohexane sulfonic acid (PFHxS) and perfluoroheptanesulfonic acid (PFHpS).

The findings might assist well being care suppliers tailor remedy plans to higher serve sufferers, in addition to supply hints in regards to the organic mechanisms that underlie the well being results of PFAS. The examine additionally underscores the necessity for stronger limits on PFAS ranges in meals packaging, water provides and different sources of publicity, the researchers stated.

“Our examine reveals a transparent affiliation between PFAS publicity and weight-related outcomes in bariatric surgical procedure for adolescents,” Baumert stated.

“PFAS are a modifiable threat, which is why protecting insurance policies are so vital to scale back publicity and safeguard public well being—particularly for weak populations.”

Monitoring long-term outcomes

The researchers analyzed information on 186 teenagers from the Teen-Longitudinal Evaluation of Bariatric Surgical procedure (Teen-LABS) examine who underwent bariatric surgery between 2007 and 2012.

Earlier than surgical procedure, blood samples had been collected from every affected person and examined for ranges of seven varieties of PFAS. Weight, physique mass index (BMI) and waist circumference had been measured earlier than surgical procedure and 6 months, one yr, three years and 5 years after surgical procedure.

To research the info, the researchers divided sufferers into three teams based mostly on their blood PFAS concentrations: low, medium and excessive publicity.

Total, sufferers with greater blood ranges of PFOS, PFHxS and PFHpS gained extra weight and had larger will increase in waist circumference one to 5 years post-surgery, in comparison with sufferers with decrease blood ranges of these chemical compounds.

As an example the distinction for PFOS, adolescents with a beginning physique weight of 328 kilos within the low publicity group regained, on common, 35.9 kilos by the five-year mark. However teenagers of the identical weight with the very best PFOS publicity regained, on common, 46.9 kilos.

For PFHpS, teenagers within the highest publicity group regained weight at a mean of 4.3% of their baseline body weight per yr, in comparison with 2.7% per yr within the lowest publicity group.

Higher affected person care

The examine provides to the mounting proof supporting stronger regulation of PFAS, the researchers stated—significantly in public water supplies, that are the best supply of publicity.

It additionally factors to potential methods for bettering affected person care. Bariatric surgical procedure is dear and invasive, so understanding who’s more likely to profit may help suppliers make knowledgeable choices about the most effective course of remedy for every particular person.

“We’re additionally all in favour of exploring whether or not PFAS publicity is related to different weight reduction interventions,” together with GLP-1 drugs akin to Ozempic, Baumert stated.

As well as, Baumert and her workforce are investigating the hyperlink between PFAS and long-term metabolic well being. For instance: how would possibly PFAS publicity relate to an individual’s threat for sort 2 diabetes and metabolic dysfunction-associated steatotic liver illness (MASLD)? The researchers at the moment are analyzing these connections utilizing information from the Teen-LABS examine.