Hello, I'm Dr. Jaeho Cho, Director of The Line Plastic Surgery.
The recent rise of GLP-1 receptor agonists such as Wegovy and Mounjaro has brought major advances to obesity treatment. However, a rapid drop in body mass index (BMI) can be accompanied by structural changes in the skin and soft tissue. Let's take a closer look, based on actual published research, at the background of "Ozempic face" and body sagging that can follow rapid weight loss, along with the current evidence — and its limits — around regenerative strategies to address it.
Is Ozempic face actually becoming more common?
Fat is not merely a mass of tissue — it is a three-dimensional structure that helps support the skin. When medication causes fat cell volume to shrink rapidly over a short period, the extracellular matrix (ECM) beneath the dermis tends to lose elasticity, as it cannot keep pace with the rate of shrinkage. This tends to appear first in the face, often leading to hollowing beneath the cheekbones and deepening nasolabial folds — commonly referred to as "Ozempic face."
In a December 2025 survey by the American Academy of Facial Plastic and Reconstructive Surgery (AAFPRS), 67% of respondents reported an increase in patients seeking treatment for aesthetic changes related to GLP-1 weight loss, a 45% increase from the prior year[1]. The same survey found that facial fat grafting procedures increased for two consecutive years, up 50%[1]. This appears to be less a matter of typical aging and more a case where the skin's support structure fails to adapt quickly enough to the pace of weight loss.
Is it true that "pre-diet cells are better"?
Multiple studies note that the quality of transplanted cells is one important variable in planning regenerative procedures. However, the claim that "fat or stem cells harvested before starting a diet — that is, before weight loss — have greater regenerative capacity than those harvested afterward" diverges from the current body of research.
A follow-up study of patients who lost weight after bariatric surgery found that adipose stem cells harvested after weight loss showed significantly improved mitochondrial respiratory function and markedly increased proliferative capacity[2]. Inflammation-related genes such as TNF-α, CCL5, and COX2 also decreased significantly after weight loss[2]. That said, the same study also found that cell characteristics do not fully return to a normal state even after weight loss[2], making it difficult to conclude definitively that "before is better" or "after is better."
In other words, no clinical study has directly compared transplant outcomes based on harvest timing (pre- vs. post-medication), and this remains an area where further evidence is needed.
The Line's approach to fat and stem cell processing
The Line applies a precise processing method designed to minimize cell damage during fat harvesting and processing, and manages tissue through its own storage system when needed.
That said, as noted above, it cannot be stated with certainty that harvesting and storing before medication produces better regenerative outcomes than harvesting afterward. The suitability of fat/stem cell storage and transplantation can vary depending on an individual's health status, rate of weight loss, and target area, so whether and when to proceed is best determined through individual consultation.
A clinical note
"What matters more than the number on the scale is the density of your line."
Focusing solely on a lower number on the scale, at the expense of one's natural vitality, is hard to call true success. Successful weight loss is not just about achieving a thinner body — it is about completing a healthy silhouette while maintaining elasticity.
While material quality clearly matters in transplantation procedures, the notion that "pre-diet cells are simply the best material" has not yet been academically established. If you are considering — or have already started — a GLP-1 medication, it is advisable to discuss with a specialist which options may be suitable for you in preparing for the skin laxity that can follow rapid weight loss.
By Dr. Jaeho Cho (PhD in Surgery)
--- Sources
1. American Academy of Facial Plastic and Reconstructive Surgery (AAFPRS). 2025 Annual Survey, fielded December 2025. AAFPRS 2025 Annual Survey press release
2. Effects of Bariatric Surgery-Related Weight Loss on the Characteristics, Metabolism, and Immunomodulation of Adipose Stromal/Stem Cells in a Follow-Up Study. PMC 12092157
This article summarizes questions around GLP-1 weight loss and skin elasticity based on the AAFPRS public survey and adipose stem cell research published on PubMed. Please consult a specialist to confirm your individual condition and treatment direction.