“My temples are sunken, my cheeks have collapsed – I’m only 30, but from the side I look 40.” This is the ageing anxiety of many women. Hyaluronic acid fillers give immediate results, but require regular touch‑ups, and the “foreign body sensation” puts some people off. Autologous fat grafting, on the other hand, has long been criticised for “low survival rates and unpredictable results.” The Korean Byul 3D Full‑Layer Fat Grafting uses “multi‑layer centrifugation purification + three‑dimensional tunnel injection” technology to increase fat survival rates to over 70% – allowing hollow areas to “regenerate” naturally full, youthful contours – using your own fat to reclaim your own face.
Traditional fat grafting usually uses “single‑centrifugation + coarse needle injection” – fat cells are mechanically damaged during harvesting, centrifugation is not thorough enough, and the fat is mixed with oil droplets and blood. Injection is often done in “clumps,” leaving fat cells lacking blood supply, leading to partial necrosis, liquefaction, and eventual absorption – with survival rates typically only 30‑50%, results are inconsistent, and 2‑3 touch‑up sessions are often needed to achieve the desired outcome.
Worse still, if the injection layers are uneven or too concentrated, it can lead to “hard lumps,” “calcification,” or “uneven contours” – distorting the facial profile. Many patients, after one “ineffective” session, lose faith in fat grafting and turn to HA fillers – only to face the hassle of “annual touch‑ups.”
The core issue is that fat grafting is not just “moving house” – it’s “planting a tree.” It requires cell viability, suitable “soil” (blood supply), and precise “planting” positions. Byul Full‑Layer Fat Grafting has been comprehensively upgraded across these three dimensions.
Byul 3D Full‑Layer Fat Grafting is an autologous fat transfer protocol that manages the entire chain – from “harvesting, purification, to injection” – with extreme precision. It uses “multi‑layer low‑negative‑pressure aspiration” to protect fat cell viability; “double‑centrifugation + membrane washing” to obtain the “golden fat” layer; and “three‑dimensional tunnel mesh injection” to evenly distribute fat cells to target areas, ensuring every cell gets adequate nutrition and blood supply.
Byul technology emphasises the “full‑layer” concept – not only filling the deep subcutaneous layer (for volume support) but also performing “fine patching” in the superficial layer (about 2‑3mm from the skin) so that the grafted fat seamlessly integrates with the original tissue – soft to the touch, natural in expression, with no “foreign body” feel. At the same time, the addition of platelet‑rich plasma (PRP) for “bio‑activation” further enhances fat cell survival and engraftment.
A 2.0mm micro‑cannula is used for “fan‑shaped sweeping” aspiration under low negative pressure (‑0.5atm), avoiding high‑pressure tearing of fat cells. Aspiration is performed in layers, prioritising deep “stable fat” (such as the outer thigh and deep abdominal fat) – these areas contain larger, metabolically stable fat cells with higher survival rates after grafting. No chemical agents are used throughout – a purely physical process that preserves cell membrane integrity.
The aspirated fat suspension undergoes a three‑step purification – “double‑centrifugation (low‑speed 300g×3min + medium‑speed 600g×5min) + membrane washing” – removing oil droplets, blood cells, and connective tissue fragments, retaining only the “golden fat layer” with intact cell structures. This layer is rich in adipose‑derived mesenchymal stem cells and endothelial progenitor cells, which have strong regenerative and vascularisation capacity. The purified fat has a “cheese‑like” texture – uniform and fine, ideal for precise injection.
A 1.0mm blunt micro‑needle is used for “multi‑plane, multi‑tunnel” injection in target areas (such as temples, cheeks, tear troughs, and nasolabial folds). The surgeon performs “fan‑shaped retro‑injection” at the periosteal layer, deep fat layer, and superficial fat layer, forming a three‑dimensional mesh distribution – each tunnel receives only a tiny volume (0.05‑0.1ml) of fat, ensuring every cell is in close contact with the vascular bed for adequate oxygenation. This “mesh engraftment” model raises the survival rate of grafted fat to 70‑80%.
Before injection, autologous platelet‑rich plasma (PRP) is mixed with the golden fat at a 1:10 ratio. The growth factors released by PRP – such as PDGF and TGF‑β – promote capillary neogenesis in the grafted area and provide “survival signals” to the fat cells, greatly reducing early necrosis risk. At the same time, PRP stimulates surrounding fibroblasts to secrete collagen, improving the skin texture in the grafted area – achieving a dual effect of “filling + tightening.”
Natural feel: Post‑operative touch is soft and dynamic – facial expressions are unrestricted, without the “plastic” or “stiff” feel of HA fillers.
Harmonious integration: The filling volume matches the facial bone structure – no “overfilled” or “underfilled” imbalance, with smooth transitions to the original tissue.
Personalised precision: Based on each individual’s facial anatomy and degree of hollowing, a custom “3D injection map” is designed – determining where deep support is needed and where superficial patching is required – achieving “meticulous sculpting.”
Long‑lasting durability: Once the fat cells successfully engraft, they become part of the body – results can last for years, with no need for frequent “touch‑ups.”
| Dimension | Traditional Fat Grafting | Byul 3D Full‑Layer Fat Grafting |
|---|---|---|
| Harvesting method | High negative pressure – significant mechanical damage | Low negative pressure – layered, gentle collection |
| Purification process | Single centrifugation – many impurities | Double centrifugation + membrane washing – high purity |
| Injection technique | Clump filling – poor blood supply | 3D mesh tunnel – even engraftment |
| Survival rate | 30‑50% | 70‑80% |
| Bio‑activation | None | PRP mixing – promotes vascularisation |
| Result stability | Requires 2‑3 touch‑ups | Usually satisfactory in one session |
Those with severe emaciation (BMI<18), bleeding disorders, or autoimmune diseases should be evaluated by a doctor before deciding on a plan.
💰 Cost Reference
In Korea, Byul 3D Full‑Layer Fat Grafting is priced by the number of treatment areas and the complexity of fat processing. A single area (e.g., temples) costs approximately 5,000,000 – 8,000,000 KRW; two areas (temples + cheeks) about 8,000,000 – 12,000,000 KRW; multiple full‑face areas (temples + cheeks + tear troughs + nasolabial folds) range from 14,000,000 – 22,000,000 KRW. If body liposuction (donor‑site contouring) is performed simultaneously, an additional cost of about 4,000,000 – 8,000,000 KRW applies. The above includes fat harvesting, purification, PRP preparation, and injection – but excludes hospital stay (usually day surgery).
🕒 Recovery Timeline
Days 1‑3: Mild swelling and bruising at both the donor (liposuction) and recipient (filling) sites – normal. A compression garment (for the recipient area) and a body shaper (for the donor area) must be worn; gentle walking is allowed, but avoid strenuous exercise.
Days 4‑7: Swelling gradually subsides – facial contours begin to appear. Bruising turns yellow; normal face washing is allowed (avoid needle entry points), but still avoid pressing on the face. The head garment can be worn only at night.
Weeks 1‑2: Most swelling resolves – the filled areas feel soft and natural; normal daily activities and light social engagements can resume. Soreness in the donor area (e.g., thighs) largely disappears.
Month 1: The grafted fat enters the “engraftment phase” – volume may slightly decrease (about 10‑20%) – this is normal. Light exercise can be resumed, but avoid impact to the face.
Months 3‑6: The grafted fat is fully stabilised – survival rate reaches its final level – the best results are achieved. Facial contours are full and natural, with a touch indistinguishable from the original tissue. At this point, a minor touch‑up can be assessed if needed (usually not required).
A hollow face is like a dried‑up riverbed – it has lost the fullness of life. The significance of Byul Full‑Layer Fat Grafting is to use your own “living material” to re‑irrigate that land – not an external fill, but an internal regeneration. When the fat cells take root and grow in your face, you’ll find that the years are not “filled in” – they are “awakened.” That face you know so well has finally found its own curves and warmth again.