For those seeking beauty, is hyaluronic acid injections or fat grafting more cost-effective? For better skin and anti-aging, should you choose hyaluronic acid or fat? Fat grafting with stem cells—is it worth the expense?
Key Point 1: Within 3-5 years, 80%-90% of fillers (like hyaluronic acid) may be replaced by fat grafting?
Fat grafting has emerged as one of the hottest techniques in recent plastic surgery research. Unlike traditional fillers (like hyaluronic acid), which are allogeneic, short-lasting, and expensive, autologous fat transfer offers distinct advantages. First, it's inherently safe with no risk of rejection complications. Second, its effects are permanent, lasting a lifetime.Third, harvesting is highly convenient—it can be taken from the patient's own body, collected from multiple sites, and repeatedly harvested. Fourth, it involves minimal trauma compared to surgical procedures.
The most distinctive feature of fat grafting is its tissue regeneration potential—something fillers like hyaluronic acid lack. When fat is injected into the face, for instance, in cases of aging with numerous wrinkles and poor skin texture and elasticity,However, after fat grafting, the adipose-derived stem cells within the fat exert their reparative and regenerative functions. This leads to noticeable improvements in skin elasticity, tone, radiance, smoothness, and thickness—the four key elements of healthy skin. These regenerative and restorative capabilities, absent in fillers, represent the greatest advantage of fat grafting.Adipose stem cells enable repair, regeneration, and enhanced fat graft survival rates. Current fat grafting techniques face no inherent limitations; rather, the focus lies in fully unlocking their potential. Given the multifaceted benefits and effects of fat—earning it the nickname "soft gold of the human body"—a crucial component is adipose stem cells. How to maximize their efficacy while controlling and quantifying their development remains an area requiring ongoing exploration.
Stem cells have multiple sources, primarily bone marrow stem cells, umbilical cord blood stem cells, and peripheral blood stem cells. However, these methods either involve significant trauma or ethical concerns, limiting their development. Only adipose stem cells offer widespread storage sources and convenient collection. Moreover, their functionality rivals that of umbilical cord blood and bone marrow stem cells, demonstrating remarkable potency.With minimal trauma and no ethical concerns, adipose-derived stem cells show significant potential to replace other stem cell sources.
During fat grafting procedures, adipose-derived stem cells perform multiple functions. First: They rapidly induce vascular proliferation around the graft site, accelerating blood vessel growth and enhancing blood supply to the fat tissue. This significantly improves the survival rate of transplanted fat.Second, adipose stem cells possess inherent repair capabilities. When injected into tissues with pathological changes—such as scarring—they activate scar repair mechanisms. This softens scar tissue, gradually diminishes hypertrophic scarring, and promotes scar transformation toward normal tissue. They also exhibit regenerative repair functions.Thus, the two primary functions of adipose stem cell transplantation can be summarized as follows: enhancing local blood supply and exerting their repair and regenerative capabilities.
Key Point Three: The recently emerging "nano-fat" technique represents a new highlight in fat grafting technology.
Previous applications of adipose-derived stem cells generally fall into two categories. The first involves extracting the cells, proliferating them in vitro, and then reintroducing them into the body. Due to various reasons, this method of proliferating and reintroducing cells is strictly controlled by China's National Health Commission and health supervision authorities. National government departments have very strict regulations on stem cell applications.The second approach involves processing the cells without proliferation. After enrichment, the stem cells are reintroduced into the body. This method has two variations: one uses enzymatic digestion to break down non-stem cell components, concentrating the remaining adipose stem cells for injection. The other, a recent innovation, is nano-fat. This technique employs simple physical processing to disrupt fat tissue, preserving more adipose stem cells.This method avoids enzymatic digestion and ex vivo cell proliferation, aligning more closely with current regulations while offering greater convenience. Clinicians can directly convert fat into nanofat through physical processing during surgery, injecting it as adipose stem cells. When nanofat is mixed with conventional fat for application, survival rates show a distinct difference.In well-executed fat grafting procedures, post-operative survival rates typically exceed 70%. However, using nano-fat implants can potentially increase this to 85%. Conversely, if the original fat graft success rate was lower—say, 50%-60%—applying nano-fat could elevate it to 70%-80%. This clearly demonstrates its efficacy in enhancing fat survival rates.
Key Point 4: Fat storage (cryopreserved fat) is a field currently being developed worldwide.
In the past, we discarded fat after harvesting and using it, which was wasteful.Now, after harvesting fat, we transform it into a filler material or isolate fat stem cells for reinjection. The question arises: should unused fat stem cells be discarded or stored for future use? This will be the central theme of next year's Fat Conference—fat storage, or the reuse of fat from a "fat bank."Countries worldwide are actively pursuing this research. Both current clinical practice and foundational studies support the extraction, transplantation, and long-term storage of adipocytes at controlled temperatures for future utilization.The efficacy of cryopreserved fat is nearly identical to that of fresh fat. Advanced techniques ensure optimal storage conditions. Fat cells can be frozen without crystallization—a non-freezing cryopreservation method has been developed, opening vast prospects for future fat harvesting and reuse.