Beauty buffs are showing up with “Ozempic body” — but it’s not the svelte physique they were promised.

Hollywood’s go-to rapid weight loss drug is leaving patients with lots of saggy skin where fat used to be, according to Kim Kardashian’s doctor.

Dr. Simon Ourian, 56, is the cosmetic dermatologist that stars, including the Kardashians, Lady Gaga, Jenna Dewan and Sofia Vergara, trust with their tune-ups.

But, as he recently told The Hollywood Reporter, patients who have used injectable diabetes drug Ozempic are now coming back to him for filler, to reverse the work of gravity prompted by fat loss.

“If you lose a lot of weight quickly, your skin gets saggy, everything from the face to the buttocks is deflated,” Ourian told the outlet, dubbing the unfortunate outcome “Ozempic body.”

“If you maintain your [new] weight for a year or two a lot of times your skin tightens up on its own. But if you want immediate results [because] you are in front of the camera, there are ultrasound and radiofrequency treatments, fillers or you can go as far as getting surgery,” the doctor further explained.

The Post has reached out to Ourian for comment.

Semaglutide, sold under the brand names Ozempic and Wegovy, quickly sheds pounds by making people feel fuller for longer and slowing digestion. However, some users have gained the weight back — or even more of it — when they stopped taking it.

And an Ozempic diet is an investment, costing consumers over $1,000 a month for off-label use.

Side effects associated with semaglutide include vomiting and diarrhea, runny nose or sore throat, headache, dizziness, and tiredness.

But for Ourian’s wealthy clientele, their best bet may be his $8,000 monthly package that includes injections of Ozempic, lab tests for advance screening and monitoring, vitamin D and B shots to counteract side effects, menu plans, and personalized body-contouring treatments.

Despite the Kardashian doc’s dishing, sister Khloe has denied using the drug — but other celebrities aren’t ashamed to share their Ozempic stories. Indeed, comedian Chelsea Handler even claimed to have taken the medication unknowingly because her doctor was practically giving it away.