Facial fat grafting (also known as fat transfer or lipofilling) has become an increasingly important part of modern facial rejuvenation. Unlike dermal fillers, which are temporary synthetic products, fat grafting uses the patient’s own tissue to restore volume and improve skin quality.
Two terms that are frequently used are microfat and nanofat. Although both are derived from harvested fat, they serve very different purposes. Microfat is primarily a volume restoration or structural treatment, while nanofat is primarily a regenerative skin treatment.
Understanding this distinction is essential when considering fat grafting for facial ageing, under-eye rejuvenation, acne scarring or skin quality improvement.
What Is Microfat?
Microfat consists of purified fat harvested from the patient’s own body, typically from the abdomen, flanks or thighs. The fat is processed and reinjected into areas of volume loss while preserving living fat cells (adipocytes). The goal of microfat grafting is straightforward: to replace tissue that has been lost through ageing.
As we age, facial fat compartments shrink and descend, leading to:
- Hollow cheeks
- Temple hollowing
- Under-eye volume loss
- Flattening of the midface
- Loss of facial support
Microfat restores volume using living tissue rather than synthetic filler. Because the transferred fat cells can establish a blood supply and survive long term, results can be extremely durable and, in some cases, effectively permanent.
What Is Nanofat?
Nanofat begins as harvested fat, but it undergoes further mechanical processing and filtration. During this process, the mature fat cells are largely destroyed, leaving behind a fluid rich in:
- Stromal vascular fraction
- Adipose-derived regenerative cells
- Growth factors
- Signalling molecules
Unlike microfat, nanofat provides almost no meaningful volumisation. Instead, its purpose is to improve the quality of the surrounding tissues. Nanofat is therefore best thought of as a regenerative treatment rather than a volumetric treatment.
What Are the Advantages of Fat Grafting?
One of the biggest attractions of fat grafting is that it uses the patient’s own tissue. This avoids many concerns associated with synthetic products and allows treatment of both volume loss and skin quality within the same procedure.
Potential advantages include:
- Use of autologous tissue
- Natural appearance and feel
- Long-lasting results
- Simultaneous treatment of multiple facial areas
- Potential regenerative effects
What Are the Limitations?
Fat grafting is a procedure rather than a simple injectable treatment. It requires:
- Fat harvesting
- Sedation or general anaesthesia
- Recovery time
- Technical expertise
Results can also be less predictable than fillers because not all transferred fat survives. Some patients require secondary grafting procedures to achieve optimal correction.
Summary Table
| Feature | Microfat | Nanofat |
|---|---|---|
| What is it? | Purified autologous fat containing living adipocytes | Mechanically processed fat containing regenerative cells and signalling molecules, with few or no intact fat cells |
| Main mechanism | Long-term volume replacement | Regenerative signalling and tissue remodelling |
| Primary role | Volume restoration | Skin quality improvement |
| Hydration improvement | Minimal | Mild |
| Texture improvement | Mild to moderate | Moderate |
| Fine line improvement | Mild | Moderate |
| Pore reduction | Minimal | Mild |
| Volume restoration | Excellent | Minimal |
| Collagen stimulation | Mild to moderate | Moderate |
| Effect on skin quality | Mild to moderate | Moderate |
| Best use | Temple hollowing, cheek augmentation, facial volume loss, facial lipoatrophy and structural rejuvenation | Crepey skin, under-eye rejuvenation, acne scars, solar damage and skin regeneration |
| Immediate results | Yes | No |
| Typical durability | Potentially permanent (although graft survival is variable) | Potentially years (although results are variable) |
| Reversible | No | No |
| Typical treatment course | Usually one surgical procedure, occasionally requiring secondary grafting | Usually one treatment session, occasionally repeated after 6-12 months |
| Closest injectables | Dermal Fillers, biostimulators, and hybrid products | Skin Boosters, polynucleotides, PRP, and exosomes |
Frequently Asked Questions
How Do Microfat and Nanofat Work?
The two treatments address different aspects of facial ageing:
- Microfat works through tissue replacement. It physically restores lost volume in areas where ageing has caused deflation. The transferred fat integrates into the recipient tissues and contributes structural support. The result is improvement in facial contours, fullness and overall facial proportions.
- Nanofat works through tissue regeneration. The cellular components and signalling molecules within the nanofat are believed to stimulate collagen production, tissue repair, improved skin quality, and extracellular matrix remodelling. Rather than changing facial shape, nanofat aims to improve the quality of the skin itself.
Is nanofat the same as PRP?
No. PRP is derived from blood and relies primarily on growth factors released by platelets. Nanofat is derived from adipose tissue and contains stromal vascular fraction, regenerative cells and signalling molecules.
Does PRP help fat grafting?
PRP treatment can be combined with facial fat grafting to improve fat survival, accelerate healing and enhance regenerative effects. PRP contains a high concentration of growth factors involved in angiogenesis and tissue repair, leading to the theory that it may help newly transferred fat establish a blood supply more quickly and therefore improve graft retention. Meta-analysis has shown higher fat graft survival rates and shorter recovery times when PRP is combined with fat grafting (1).
Does nanofat add volume?
Very little. Nanofat is primarily a regenerative treatment designed to improve skin quality rather than facial contours.
Is microfat permanent?
Transferred fat that successfully establishes a blood supply can survive for many years. However, some of the grafted fat is typically resorbed during the healing process.
Can nanofat and microfat be combined?
Yes. Many surgeons perform both treatments together. Microfat restores volume, while nanofat is used to improve skin quality and tissue regeneration.
Is fat grafting better than dermal fillers?
Neither is universally better. Microfat is often considered a biological alternative to dermal fillers – both treatments restore volume, but their characteristics differ significantly:
- Dermal fillers offer greater precision, reversibility and convenience.
- Microfat offers the possibility of larger-volume, longer-lasting correction using the patient’s own tissue.
For younger patients with isolated volume loss, fillers may be attractive because they are simple and reversible. For patients undergoing comprehensive facial rejuvenation, fat grafting often provides a more holistic solution.
What is the best age for fat grafting?
There is no specific age. The decision is based on anatomy, volume loss and treatment goals rather than chronological age.
Conclusion
Although nanofat and microfat are both derived from harvested fat – and often used in combination – they should be viewed as fundamentally different treatments.
- Microfat is primarily a volume restoration procedure. It replaces lost tissue using living fat cells and is often one of the most powerful tools available for structural facial rejuvenation.
- Nanofat is primarily a regenerative treatment. It is designed to improve skin quality, texture and tissue health rather than restore facial volume.
For many patients, the most effective approach is not choosing one or the other, but combining both. Microfat addresses the structural changes of facial ageing, while nanofat targets the overlying skin. Used together in fat transfer, they provide an effective, comprehensive, and biologically driven approach to facial rejuvenation.
