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Rejuran Before and After: What Results Actually Look Like at Week 2, Month 1 and Month 3
Written by FillersFairy Editorial · Reviewed by FillersFairy Clinical Team · Last updated: June 22, 2026
Quick Answer
Rejuran results develop gradually over weeks, not instantly. Week 1–2: improved hydration and glow as PN binds water in the dermis. Month 1: visible texture improvement, pores appear tighter, fine lines soften. Month 2–3: collagen remodelling reaches its peak — skin elasticity, firmness and overall quality at their strongest. Full protocol is typically 3 sessions at 2–4 week intervals, with results lasting 6–12 months. The before-and-after change is subtle but cumulative — patients often describe it as “my skin just looks healthier” rather than a dramatic single-moment transformation.
The Results Timeline
Rejuran works through biological repair, not mechanical filling. That means the results build progressively as the polynucleotide activates fibroblasts and new collagen forms. Understanding this timeline prevents the “it didn’t work” complaint at Day 3 and builds realistic expectations.
| Time Point | What the Patient Sees | What’s Happening Biologically |
|---|---|---|
| Day 0–3 | Mild swelling, possible injection marks (tiny bumps at entry points). Skin feels slightly puffy. This resolves within 2–3 days for most patients. | PN fragments are integrating into the dermis. Mild inflammatory response initiates the healing cascade. No collagen stimulation yet. |
| Week 1–2 | Skin looks more hydrated, plumper. Some patients notice an immediate “glow” once the injection bumps resolve. Fine lines appear softer. | PN acts as a hydrophilic polymer, binding water in the dermis. A2A receptor activation begins — fibroblasts are starting to respond. |
| Week 2–4 (+ Session 2) |
Texture improvement becomes noticeable. Pores appear tighter. Skin tone evens out. The “glass skin” effect starts to emerge. | Collagen synthesis is accelerating. Session 2 adds a fresh round of PN on top of the ongoing fibroblast activation from Session 1. |
| Month 1–2 (+ Session 3) |
Skin elasticity noticeably improved — skin bounces back when pressed. Fine lines significantly softened. Acne scars (if treated with Rejuran S) begin to shallow. | Three rounds of PN active simultaneously. Collagen matrix is building density. Elastin production supports skin firmness. |
| Month 2–3 (Peak results) |
Maximum improvement. Skin firmness, texture, hydration and luminosity at their best. This is the optimal window for before-and-after photography. | New collagen matrix is fully mature and integrated. Skin thickness measurably increased. A split-face study documented improved skin elasticity and increased dermal thickness on the Rejuran-treated side (Kim et al., PMID 31702128). |
Results by Skin Concern
Different skin concerns respond at different speeds. Setting concern-specific expectations during consultation prevents mismatched expectations:
| Skin Concern | First Visible Improvement | Peak Result | Degree of Change |
|---|---|---|---|
| Dehydrated, dull skin | Week 1 | Week 2–3 | Dramatic — “glass skin” glow |
| Fine lines | Week 2–3 | Month 2–3 | Significant softening |
| Enlarged pores | Week 3–4 | Month 2–3 | Noticeable tightening |
| Skin elasticity loss | Month 1 | Month 2–3 | Measurable improvement (bounce-back test) |
| Under-eye dark circles (Rejuran I) | Week 2–3 | Month 1–2 | Moderate — skin thickening reduces vascular show-through |
| Acne scars (Rejuran S) | Month 1 | Month 2–3 | Moderate — gradual collagen filling of depressions |
Timeframes are typical ranges based on clinical observation and published data. Individual results vary.
Results by Rejuran Variant
| Variant | Best For | Sessions | Duration |
|---|---|---|---|
| Rejuran Healer | Full-face rejuvenation, texture, glow, fine lines | 3, every 2–4 weeks | 6–12 months |
| Rejuran S | Acne scars, surgical scars, focal texture issues | 3, every 2–3 weeks | 6–12 months |
| Rejuran I | Under-eye dark circles, periorbital rejuvenation | 3, every 2–4 weeks | 6–12 months |
| Rejuran HB | Deep hydration + skin barrier repair | 3, every 2–4 weeks | 6–12 months |
What Changes After Each Session
After Session 1: Hydration boost is immediate once injection bumps resolve (Day 2–3). Skin feels more supple. Some patients are underwhelmed because they expect a dramatic visible change — reassure them that collagen stimulation is underway beneath the surface.
After Session 2: The cumulative effect becomes visible. Patients start noticing texture improvement and pore tightening. The “glass skin” glow is typically apparent by this stage. This is when patients start getting unsolicited compliments — “your skin looks great, what are you doing?”
After Session 3: Three rounds of PN are active simultaneously. The collagen matrix is building rapidly. Skin firmness is noticeably improved. The full treatment benefit continues developing for another 2–3 months as collagen matures.
Month 2–3 post-final session: Peak results. Take before-and-after photos for your clinic portfolio at this point.
Before-and-After Photography Guide for Rejuran
Baseline: Take photos before Session 1 under consistent lighting. Frontal, 45° and profile views. Close-up of primary concern area.
Key principle: Rejuran’s improvement is often more visible in close-up texture shots than in wide-angle face shots. Side lighting reveals texture changes better than flat lighting. Under-eye improvements show best in well-lit frontal close-ups.
Best timing for “after” showcase: Month 2–3 after the final session. This captures the peak collagen remodelling effect.
What to highlight: Skin texture (pore size, smoothness), hydration (glow, dewiness), fine lines (periorbital, perioral), and overall luminosity. For scar patients, standardised overhead lighting reveals depth changes most accurately.
Practitioner Confidence Summary
Rejuran’s before-and-after story is “healthy skin from within” — not an instant transformation but a cumulative biological improvement that patients and their social circles notice over weeks. The PN mechanism (A2A receptor activation → fibroblast stimulation → collagen + elastin) produces results that last because they come from the patient’s own tissue. For clinics, this means high satisfaction rates, strong word-of-mouth referrals, and a treatment that pairs naturally with almost every other aesthetic procedure on the menu. View Rejuran product details →
Frequently Asked Questions
When will I see Rejuran results?
Hydration and glow improve within the first 1–2 weeks. Texture and pore improvements become noticeable around Week 3–4. Full collagen remodelling peaks at Month 2–3 after the final session. The improvement is gradual and cumulative across the 3-session course.
How long do Rejuran results last?
Typically 6–12 months after completing the 3-session course. Duration depends on age, skin condition, sun exposure and maintenance. Many practitioners recommend a maintenance session every 6–9 months to sustain results.
Why don’t I see results after one Rejuran session?
One session provides a hydration boost, but the collagen-stimulating effect needs all 3 sessions to reach meaningful levels. The PN from Session 1 is starting to work, but visible collagen improvement takes 4–6 weeks to develop. Complete the full course before assessing results.
What is the “glass skin” effect from Rejuran?
Rejuran’s PN acts as a hydrophilic polymer that binds water in the dermis, increasing skin hydration from within. Combined with the texture-smoothing effect of new collagen production, this creates the luminous, translucent quality that Korean clinics call “glass skin.” The effect is most visible after Session 2–3.
Can I see Rejuran results on scars?
For acne scars, Rejuran S (the scar-specific variant) shows visible improvement from Month 1, with peak results at Month 2–3. Rolling and shallow boxcar scars respond best. Deep ice pick scars respond poorly. See our Rejuran for Acne Scars guide for detailed scar-type analysis.
Related Guides
Disclosure: FillersFairy is a wholesale supplier of Rejuran and other Korean aesthetic products. This article is for educational purposes only and does not constitute medical advice.
References
- Kim et al. Split-face study on polynucleotide skin rejuvenation. PMID 31702128. 2020.
- PharmaResearch. Rejuran product line (Healer, S, I, HB) specifications. pharmaresearch.co.kr.
- Korean cosmetic physician survey on PN efficacy for skin quality and pore treatment. 2024.
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