Introduction

If you’ve been exploring non-surgical or minimally invasive options to restore youthfulness to your face, chances are you've come across Rejuran, fillers, and fat grafting. All three are popular in South Korea — not just because of K-beauty trends, but because they offer noticeable, customizable results with little downtime.

Let’s break that down — not with marketing promises, but with a surgeon’s perspective.

First, Let’s Get Clear: What Are We Comparing?

Before talking longevity, it’s essential to understand what each treatment is fundamentally doing:

• Rejuran (also called Rejuran Healer) is a regenerative skin booster. It uses polynucleotides (PN) — derived from salmon DNA — to stimulate collagen production, improve skin texture, and support natural healing.
• Filler (typically hyaluronic acid-based) is a volumizing substance that is injected to contour areas like under the eyes, cheeks, lips, and nasolabial folds. Its effects are immediate and structural.
• Fat grafting (also known as fat transfer or fat injection) involves harvesting your own fat from one area (like the thighs or abdomen) and re-injecting it into areas that need volume and rejuvenation — often the face.

They may treat similar concerns — fine lines, hollow cheeks, or under-eye volume loss — but they work in very different ways.

So, Which One Really Lasts the Longest?

Filler: 6–18 Months (But Highly Variable)

• Longevity: Depending on the type, density, and placement, most fillers last anywhere from 6 to 18 months.
• Factors That Shorten Duration:
  • High-movement areas (like lips or smile lines) break filler down faster.
  • Metabolism: People with fast metabolisms tend to absorb filler more quickly.
  • Filler type: Some newer fillers like Juvederm Voluma or Restylane Lyft are designed to last longer, particularly in deeper layers.
• Maintenance: Most patients return for touch-ups once a year.

Rejuran: 6–12 Months (With Cumulative Benefit)

• Longevity: Rejuran isn’t about instant results. Think of it as a long-term investment in your skin.
  Typically, results start appearing after 2–4 sessions spaced one month apart, with benefits lasting 6 to 12 months depending on your skin condition and lifestyle.
• What sets it apart:
  Rejuran stimulates your skin to produce more collagen and repair itself — a process that continues for months even after treatment ends. So while the “visible” glow may fade after a year, the foundational skin improvements can last much longer.
• Maintenance: For optimal results, many patients repeat the full protocol once or twice a year. But skin quality often remains improved even without frequent retreatment.

Fat Grafting: Years — Sometimes Permanent

• Longevity: This is where things get interesting.
  With proper technique and healing, fat grafting can last for several years — even permanently.
• But not all transferred fat survives. After the procedure, your body reabsorbs some of the injected fat — usually about 30–50% within the first few months. The remaining fat cells, once stabilized, can survive long-term just like fat anywhere else in your body.
• Longevity Factors:
  • Technique: The survival of fat depends heavily on how it’s harvested, processed, and injected. At Hugo Plastic Surgery, we use microfat and nanofat techniques to maximize integration and smoothness.
  • Your body: If you experience significant weight loss, the fat may shrink. If you gain weight, the grafted area might enlarge.
  • Location: Fat grafting to the cheeks or temples tends to last longer than areas with high mobility like lips.

So… Why Doesn’t Everyone Just Get Fat Grafting?

That’s a fair question — especially if it can be permanent.

• Rejuran is best for texture and elasticity — especially for patients in their 30s or 40s noticing fine lines, large pores, or dullness.
• Filler is ideal for quick, precise volume correction — perfect for first-timers or specific contour changes (e.g., nose bridge, tear troughs).
• Fat grafting is a more involved procedure, often recommended for people seeking more durable facial volume restoration — or undergoing other procedures like eyelid surgery or lifting.

Real-World Insight: What We See at Hugo Plastic Surgery

At our Gangnam clinic, we often treat international patients who come in asking for fillers — but leave choosing fat grafting after understanding their long-term goals.

Choosing the Right Option: How to Decide

Here’s a simple way to look at it:

Final Thoughts from the Clinic

• Rejuran enhances your skin’s ability to heal and regenerate.
• Fillers sculpt your face with instant results.
• Fat grafting offers natural volume that, when done well, can last for years.

The key is precision — and personalization. At Hugo Plastic Surgery, Dr. Seonghyeok Yang believes in tailoring every treatment to your facial structure, skin condition, and long-term aesthetic goals. Whether you’re looking for a subtle glow-up or lasting transformation, we’ll guide you with honesty and expertise.

Ready to explore the treatment that fits your goals?