What Is SADI-S Weight Loss Surgery? Inside the Procedure That Remi Bader Underwent to Shed Pounds

Remi Bader is finally opening up about her weight loss and the procedure that helped her achieve it. In a March 2025 interview with Self, the model revealed that she underwent a form of bariatric surgery called single anastomosis duodenal-ileal bypass with sleeve gastrectomy (SADI-S) in December 2023. The surgery is a newer procedure, and many fans of Remi were curious to learn more about it.

What Is SADI-S Weight Loss Surgery?

A SADI-S procedure has two steps, with the first being a sleeve gastrectomy, a.k.a. gastric sleeve surgery, according to Mayo Clinic. This is where part of the stomach is removed, creating a tube shape. Then, during the second part of the procedure, “a section of the small intestine, known as the duodenum, is closed off just below the new stomach sleeve. This opening below the new stomach is then connected to a part of the lower small intestine, called the ileum. This is the duodeno-ileal bypass.”

Sia Reveals She Got Liposuction After Putting ​On ‘a Lot of Weight’

Mayo Clinic notes that the “bypass routes food through only about 10 feet of the small intestine, instead of the usual 25. This means there is less time and distance for the body to absorb fat and calories.”

How Much Does SADI-S Weight Loss Surgery Cost?

A SADI-S surgery can range in price, but it tends to fall on the higher end of bariatric surgeries, according to GoodRx. The outlet lists the procedure at an average price of $20,000 before insurance coverage. However, the total cost of the surgery can depend on the length of the hospital stay, surgeon fees, complications during surgery, anesthesia fees, geographical fees and more.

Why Did Remi Bader Get SADI-S Surgery?

In her interview, Remi revealed that her surgeon recommended the procedure because of the model’s binge eating.

Dr. Christine J. Ren-Fielding, surgeon and head of the division of bariatric surgery at NYU Langone Health told Self, “Nobody wants to have surgery. [Patients] usually come to me when they’ve tried every option to lose weight … diet, exercise, inpatient weight management centers like Duke. They’ve been on low-calorie diets, Atkins, keto — I mean everything — and they’ve either lost a lot of weight but weren’t able to maintain it, or they did not lose enough weight because it was just too difficult to stay on that plan for a prolonged period of time.”

Dr. Ren-Fielding told The New York Post that the ideal candidates for SADI-S surgery are “people who have hundreds of pounds to lose because it offers the absorption aspect.” Additionally, it may be the better option for patients with severe weight issues because of their low metabolism.

“What you need to do is add a component where the intestines aren’t absorbing as many calories in terms of fat,” she added.

What Is the Recovery Process for SADI-S Surgery?

SADI-S surgery has a typical recovery time of two to three weeks, according to Dr. Ren-Fielding. However, Remi detailed a “brutal” experience with her own recovery, explaining that she was “throwing up” for hours afterward.

Deal of the Day

Stay Dressed To Impress All Summer Long, Thanks to This Portable Steam — 70% Off View Deal

Celebrity Weight-Loss Extremes! What Kim Kardashian, More Did to Get Fit

“It was not normal. I was supposed to leave [the hospital] in one day. I could not stop projectile vomiting, and I couldn’t drink water. They won’t let you leave if you can’t drink water,” she said. “I actually can’t explain how horrible it was.”

Remi was discharged from the hospital after three days, but she said her symptoms continued for six weeks.

Today, Remi said that her binge eating is “better,” but she still struggles at times.

“I can’t physically binge as much because I don’t have the room for it. You cannot drink and eat within the same 30 minutes,” she said. “Sometimes I’m out to dinner with friends, and I run to the bathroom. It’s also hard; I’m going to these events and dinners, and I’m constantly getting sick.”