Quick Answer : When comparing Rejuran vs Sculptra, both stimulate collagen production , but through different active ingredients and mechanisms. Rejuran uses Polynucleotide (PN) derived from salmon DNA, focusing on skin repair and hydration, with results lasting around 6 months. Sculptra uses Poly-L-Lactic Acid (PLLA), focusing on intensive collagen stimulation to lift sagging skin, with results lasting 1.5–2 years.
What Are Rejuran and Sculptra?
Before comparing the two, let’s understand what each one actually is.
Rejuran is a Skin Booster containing Polynucleotide (PN), derived from salmon DNA. It’s injected into the Dermis, where it sends biological signals that encourage skin cells to repair themselves.
Sculptra is a Biostimulator containing Poly-L-Lactic Acid (PLLA), a synthetic, biocompatible substance. Once injected, it gradually breaks down while stimulating Fibroblast cells to produce new collagen over time.
Read More : What is Sculptra
Rejuran vs Sculptra : Key Differences
| Detail | Rejuran | Sculptra |
|---|---|---|
| Active ingredient | Polynucleotide (PN) from salmon DNA | Poly-L-Lactic Acid (PLLA) |
| Main mechanism | Repair signalling + mild collagen stimulation | Intensive Fibroblast stimulation for collagen production |
| Best for | Dull skin, shallow acne scars, enlarged pores, dehydration | Sagging skin, deep folds, age-related collagen loss |
| Recommended sessions | 3–4 sessions, every 2–3 weeks | 2–3 sessions, every 4–6 weeks |
| When results appear | 3–5 days after the first session | 2–3 weeks after injection |
| How long results last | Around 6 months | 1.5–2 years |
| Investment | Lower cost per session, but needs more frequent top-ups | Higher upfront cost, but longer-lasting |
Why Do Both Claim to “Stimulate Collagen” — Yet Give Such Different Results?
This is where most people get confused. Both Rejuran and Sculptra genuinely stimulate collagen — but the intensity of that stimulation is very different.
Sculptra works through PLLA particles that break down slowly over months, triggering the body to build dense new collagen tissue. This makes it especially suited to people with visibly sagging skin who want structural lifting.
Rejuran, on the other hand, works through PN sending biological repair signals to skin cells. This mechanism is gentler and focuses more on skin quality than structural support — making it a better fit for dull skin, acne scarring, or dehydration rather than sagging.
Which One Should You Choose?
- Dull, dehydrated skin with shallow acne scars or enlarged pores → Rejuran
- Sagging skin, deep folds, visible signs of ageing → Sculptra
- Want to see results quickly → Rejuran (visible in 3–5 days)
- Want results that last longer without frequent top-ups → Sculptra
- Dealing with both dullness and sagging → Combining both may be appropriate, under a doctor’s assessment
Can Rejuran and Sculptra Be Combined?
Yes. When comparing Rejuran vs Sculptra, many people choose to combine both for comprehensive results, since they work on different layers and through different mechanisms. Rejuran focuses on repairing surface-level skin quality, while Sculptra works on deeper structural support — so the two don’t overlap or compete with each other.
That said, the timing between the two treatments should be spaced out according to your doctor’s recommendation, allowing your skin to recover properly between sessions.
How Safe Are Rejuran and Sculptra?
Both have a well-established safety profile and have been used in aesthetic medicine for years. Rejuran is widely approved across Asia, including South Korea, Singapore, Japan, and Malaysia, and is used clinically in Thailand under medical supervision, while Sculptra has been internationally recognized for over a decade. Both are made from substances that are highly biocompatible, meaning the risk of allergic reaction is low.
That said, safety always depends on three key factors:
- the experience of the doctor performing the injection,
- the authenticity of the product used,
- and a thorough skin assessment beforehand.
Choosing a clinic with experienced doctors and genuine products is the single most important factor in minimising risk.
How to Prepare Before Getting Rejuran or Sculptra
Good preparation leads to better, safer results — regardless of which treatment you choose.
Before your appointment,
let your doctor know about any allergies, medications or supplements you’re currently taking, and any procedures you’ve had in the past 1–3 months. This helps your doctor plan your treatment safely and appropriately.
On the day of treatment,
avoid alcohol for at least 48 hours beforehand, and avoid blood-thinning medications such as aspirin or NSAIDs for at least a week prior, to reduce the risk of bruising. Always check with your doctor before stopping any regular medication.
Aftercare
also differs between the two.
After Rejuran, avoid touching or massaging the injection area firmly for the first 24–48 hours.
After Sculptra, your doctor will likely recommend gentle massage of the treated area, following specific instructions, to help distribute the product evenly and reduce the risk of lumps forming.
Always follow your doctor’s specific aftercare instructions, as protocols can vary slightly between clinics.
FAQ : Rejuran vs Sculptra
A: Both involve a topical numbing cream beforehand, so the sensation during treatment is similar — most people describe mild tightness or pressure rather than sharp pain.
A: Not necessarily. It depends on your skin concerns. If sagging is your main issue, Sculptra alone may be enough. But if you also want skin that looks healthier and more radiant, combining it with Rejuran can give more well-rounded results.
A: Generally, Sculptra costs more per session, but lasts significantly longer, which may make it more cost-effective in the long run depending on your goals. A consultation with your doctor can help you plan what fits your budget and goals best.
A: The most common side effects are mild redness or swelling at the injection site, which usually resolve within 1–2 days. Both treatments have strong safety records, and risks are low when performed by an experienced doctor.
Related Links
- What Is Rejuran?
- Skin Booster vs Biostimulator: What’s the Difference?
- Different Types of Skin Booster
Still unsure whether Rejuran, Sculptra, or a combination of both is right for your skin? The team at La Grace Clinic offers a free skin consultation at any of our 8 branches in Bangkok. Book via LINE @lagraceclinic or visit your nearest branch.
