For Those Curious About GOURI
If you have been thinking about skin firmness and texture, you have probably come across the term "skin booster." Among them, "GOURI" is often described as a liquid-type PCL collagen booster — yet when people ask exactly what it contains and what the procedure actually does, clear answers can be surprisingly hard to find.
In this guide, Dr. Kim Gun-woo, Medical Director of Cellinique on Dosan-daero in Gangnam, walks through how GOURI is consulted on and sequenced in practice. If you are also curious about how GOURI compares with other skin boosters, you are welcome to read the Rejuran vs. Juvelook Comparison Guide or the GOURI Treatment Information Page.
3-Line Summary
1. GOURI is a liquid-type PCL (polycaprolactone) collagen booster made by DEXLEVO. It has received Korea's MFDS medical device approval and the European CE mark (the approved indication reads: "temporary improvement of periocular fine lines in adults").
2. Because it disperses as a liquid rather than particles, it is described as stimulating dermal fibroblasts, and over time it is known to support the skin's own collagen production.
3. Suitability and recovery patterns vary considerably by skin condition, age, and lifestyle, and identical results cannot be guaranteed for everyone. The specific plan is decided during the pre-treatment consultation.
1. What Is GOURI? The Science Behind Liquid PCL
GOURI is a collagen booster that delivers PCL (polycaprolactone) in a fully liquid form. PCL is a biocompatible, biodegradable polymer that has long been used in medical applications such as sutures. What sets GOURI apart is that PCL is delivered not as particles (microspheres) but in a completely liquid state. The manufacturer, DEXLEVO, describes this as their proprietary CESABP technology.
The mechanism works as follows. The liquid PCL disperses into the dermis, stimulating fibroblasts — the cells responsible for producing collagen — and as the PCL is gradually absorbed and broken down over time, it supports self-collagen production as documented in the literature. Unlike fillers that add volume to a specific area, GOURI is closer to a skin booster that targets overall skin elasticity, density, and texture.
💡 Fact-check ✓
Source: Korea's MFDS (MFDS) medical device approval · Manufacturer DEXLEVO official information
- GOURI is a medical device containing liquid PCL (polycaprolactone), manufactured by DEXLEVO.
- It has received Korea's MFDS medical device approval and the European CE mark; the approved indication reads: "temporary improvement of periocular fine lines in adults." (The precise PCL concentration (%) and MFDS registration number are not stated as fact in this article.)
- Effect descriptions relating to the collagen booster function are at a general information level; results and duration vary between individuals.
That said, collagen production proceeds gradually over time, so this is not a procedure where everything is completed in a single session. It is more realistic to distinguish between the changes seen immediately after the procedure and those that develop over the following weeks.
💡 Fact-check ✓
Source: Dimonitsas et al., J Cosmet Dermatol 2025 (PMC11845914 · PMID 39703099) · PMID 40074205 (2025)
- Liquid PCL is described in the literature as progressing through inflammation, proliferation, and remodeling phases, stimulating dermal fibroblasts to promote collagen production.
- The liquid formulation without particles is introduced as facilitating uniform dispersion, and PCL's ability to stimulate collagen synthesis has also been reported in a separate study (PMID 40074205).
- The degree and duration of effects vary between individuals and cannot be guaranteed.
| Category | GOURI (Liquid PCL) | Hydration-Focused Skin Boosters |
|---|---|---|
| Primary Mechanism | Collagen stimulation (fibroblast activation) | Hydration and surface support |
| Core Ingredient Class | PCL (polycaprolactone) | HA (hyaluronic acid)-based |
| How Changes Are Perceived | Gradual changes over several weeks | Relatively quicker hydration feedback |
One-Line Summary
A skin booster that uses liquid PCL to stimulate fibroblasts and gradually support collagen production. The procedure approach, suitability, and duration of effect vary from person to person and are determined during the pre-treatment consultation.
2. GOURI at a Glance
| Item | Information |
|---|---|
| Ingredient Class | Liquid PCL (polycaprolactone) |
| MFDS Classification | Korea's MFDS medical device approval (approved indication: "temporary improvement of periocular fine lines in adults") |
| Manufacturer | DEXLEVO |
| Approval Scope | Korea's MFDS approval + European CE |
| Primary Mechanism | Fibroblast stimulation for self-collagen production |
| Anesthesia | Topical anesthetic cream (depending on treatment area) |
| Downtime | Generally short, but swelling, redness, and bruising vary considerably between individuals |
| Perceived Change Pattern | Gradual changes over several weeks; significant individual variation |
| Recommended Sessions & Interval | Determined individually during the pre-treatment consultation |
| Consultation & Treatment | Dr. Kim Gun-woo personally handles all consultations and treatments |
| Cases Requiring Careful Review | Pregnancy/breastfeeding, active infections, anticoagulants/immunosuppressants, autoimmune conditions, ingredient allergies — assessed during pre-treatment consultation |
※ The above is general information. Whether GOURI is appropriate for you and how the procedure will be structured can only be determined through a pre-treatment consultation. Suitability and experience vary depending on individual skin and health conditions.
3. What Concerns Lead People to Consider GOURI?
GOURI is not a procedure recommended for everyone. During consultations, the possibility of treatment is typically explored together with clients who describe the following concerns.
If You Are Experiencing These Concerns
- Those who are bothered by elasticity that has changed from what they remember
- Those who are concerned about overall skin surface quality such as texture and fine lines
- Those who want to consider overall collagen stimulation rather than volume in a specific area
- Those who are thinking about treatment as part of a long-term skin management approach rather than a one-time effect
Of course, having these concerns does not mean GOURI is always the right answer. It means it is one of the options to consider together during the consultation. Actual suitability is determined based on individual conditions during the pre-treatment consultation.
Conversely, Cases That Require Careful Consideration
- If you are currently pregnant or breastfeeding, or planning to become pregnant
- If there is an active infection or inflammation in the treatment area
- If you are taking anticoagulants, antiplatelet agents, or immunosuppressants
- If you have a history of autoimmune conditions
- If you have a history of allergy to anesthetics (such as lidocaine) or to the product's ingredients
If any of the above applies to you, please be sure to let us know in advance during the pre-treatment consultation. We will confirm whether the procedure is appropriate and, if necessary, guide you toward alternative care options.
4. How Does the Process Flow?
At Cellinique, GOURI is performed in the following sequence. Because injection site selection, depth planning, and recovery management all influence the outcome, we keep the process streamlined and stable.
- Pre-treatment consultation + skin assessment — Dr. Kim Gun-woo personally reviews skin condition, degree of elasticity loss, prior procedure history, current medications, and lifestyle habits. Whether GOURI is appropriate is usually determined at this stage.
- Treatment area and design — Areas where collagen stimulation would be beneficial, as well as combinations and sequencing with other procedures, are reviewed together.
- Recovery and scheduling review — The timing of treatment is decided based on available downtime.
- Procedure — After topical anesthetic, the product is applied to the dermal layer via micro-injection. (Injection depth and volume are individually planned based on the area and condition.)
- Aftercare + next session guidance — Immediate post-procedure precautions, recovery checkpoints, and the timing of the next session (if needed) are provided separately.
💡 A Client's Experience — Some first-time clients have mentioned: "Because I was told in advance that collagen production takes time, I wasn't anxious even when the changes right after weren't dramatic." That said, recovery and change patterns vary considerably between individuals, so please feel free to contact Cellinique at any time if you notice anything.
5. How Is Downtime and Recovery Managed?
Downtime varies slightly depending on the treatment area and scope. It tends to be relatively short overall, but temporary swelling, redness, and bruising can occur due to the nature of injection procedures, and recovery varies depending on individual healing capacity and lifestyle habits.
Commonly Experienced Reactions Immediately After the Procedure
- Temporary swelling and redness at the treatment site
- Injection marks and light bruising (when they occur, they typically resolve within a few days)
- Temporary tenderness or a pulling sensation
- A feeling of small bumps when touching the area, depending on the site (usually settles over time)
First 24 Hours After the Procedure
- Avoid irritating cosmetics, excessive heat, and vigorous cleansing
- Light makeup can be started while monitoring the condition of the treatment area
- If you notice any change in how you feel, please do not hesitate to contact Cellinique
First Week After the Procedure
- Please avoid saunas, hot baths, and intense exercise
- Apply sun protection diligently
- Reducing alcohol and smoking where possible is advisable
The key point is that recovery patterns differ from person to person, so reviewing the recovery process and treatment schedule in advance together is essential.
6. Safety Standards and Precautions
GOURI is a proper medical procedure, so it would be inaccurate to say there is no risk whatsoever. Particularly when combined with other anti-aging procedures, it is important to set realistic expectations and to carefully plan the sequence — which is why Cellinique allows ample time for consultation, area design, and post-procedure follow-up.
💡 Fact-check ✓
Source: Dimonitsas et al., J Cosmet Dermatol 2025 (PMC11845914 · PMID 39703099) · Manufacturer DEXLEVO official information
- Liquid PCL is introduced as a particle-free formulation, and the literature reports cases where it was used without serious or long-term side effects. However, this reflects reported cases and does not mean every procedure carries the same level of safety.
- Even when performed appropriately, temporary swelling, redness, and bruising are possible; rare reports of nodules, infection, and allergic reactions have also been noted.
- The frequency and recovery pattern of side effects vary between individuals.
Commonly Reported Reactions
- Temporary swelling, redness, and bruising at the treatment site (most resolve within a few days)
- Rarely, mild tenderness, warmth, or a sensation of small nodules
- Very rarely, infection, allergic reactions, or persistent nodules
Situations Requiring Immediate Contact with Cellinique
- Severe swelling, warmth, or erythema at the treatment site
- Fever or chills
- A nodule that remains hard for more than two weeks or grows progressively larger
- Suspected allergic reaction (hives, difficulty breathing, etc.)
Information You Must Share Before the Procedure
- Pregnancy or breastfeeding status (including if you are planning to become pregnant)
- Any medications you are currently taking (especially anticoagulants, antiplatelet agents, and immunosuppressants)
- Any history of allergies (including to the anesthetic lidocaine)
- Any active infections or autoimmune conditions
- Any recent procedures you have had (interval and sequence adjustments may be needed)
The side effect management, emergency response, contraindications, and infection control standards that apply across all procedures can be reviewed in detail on the Cellinique Procedure Safety Information page. If you are considering GOURI, we recommend reading through it before your appointment.
7. GOURI vs. Rejuran vs. Standard Skin Boosters
"Would GOURI or Rejuran be a better fit for my skin?" This is one of the most common questions we receive. The deciding factor is not "which product is more popular" but "which mechanism suits my skin condition." The table below is general guidance to help you understand the differences — individual suitability is determined during the consultation.
| Category | GOURI | Rejuran | Standard HA Skin Booster |
|---|---|---|---|
| Core Ingredient Class | Liquid PCL (polycaprolactone) | PN (polynucleotide) class | HA (hyaluronic acid)-based |
| Primary Mechanism | Collagen production via fibroblast stimulation | Skin regeneration and recovery | Hydration and surface support |
| How Changes Are Perceived | Gradual changes over several weeks | Gradual regeneration-focused changes | Relatively quicker hydration feedback |
| Recommended Sessions & Interval | Varies by product, area, and individual condition — decided during the pre-treatment consultation | ||
It is difficult to definitively say that one product is always superior to another — they work differently, and depending on the situation, a combination may also be considered. There is no need to commit to a single procedure, and designing a sequenced approach can be explored together during the consultation.
8. How Cellinique Operates the GOURI Program
Cellinique is an anti-aging clinic on Dosan-daero in Gangnam. For procedures like GOURI where injection depth, volume, and area design significantly influence outcomes, we believe that consistent medical oversight and thorough product understanding play a major role in the stability of results.
Dr. Kim Gun-woo draws on his experience with GOURI product training to understand injection design, and manages the process directly from the initial consultation through the procedure and post-procedure follow-up. (Independent of any external certifications such as manufacturer or academic society trainer status, the above describes the clinic's own stated operational approach; details regarding qualifications and training history will be provided during the consultation, according to the clinic.)
Being located on Dosan-daero also means that return visits and post-procedure follow-up are conveniently accessible — an advantage for a procedure like GOURI, where tracking changes over time is important.
Frequently Asked Questions (FAQ)
Q1. Is GOURI the same as a standard filler?
GOURI is quite different from a standard filler that simply adds volume to a specific area. It is known as a collagen booster where liquid PCL disperses into the dermis to stimulate fibroblasts and support collagen production. It has been approved by Korea's MFDS as a medical device with the indication "temporary improvement of periocular fine lines in adults." Suitability and the approach will be determined during the pre-treatment consultation.
Q2. What exactly is PCL? Is it a safe ingredient?
PCL (polycaprolactone) is a biocompatible, biodegradable polymer that has long been used in medical applications such as sutures. GOURI is introduced as a product that delivers this PCL in liquid form. That said, no procedure is entirely without the possibility of side effects, so individual suitability and contraindications are confirmed during the pre-treatment consultation.
Q3. When can I expect to see results?
Because GOURI works in the direction of collagen stimulation, clients are advised that gradual changes develop over the weeks following the procedure rather than immediately after. However, there is significant variation depending on skin condition, age, and lifestyle habits, and identical results cannot be guaranteed for everyone. The changes you can realistically expect will be discussed thoroughly during your pre-treatment consultation.
Q4. Is one session enough, or will I need multiple sessions?
The recommended number of sessions and interval vary depending on skin condition, goals, and the treatment area. It is generally mentioned that collagen boosters are performed over multiple sessions at regular intervals, but there is no single "correct" number of sessions — an individual plan is discussed during the initial consultation.
Q5. Can GOURI be combined with other procedures?
Whether combination is appropriate depends on the type, timing, and recovery status of procedures you are currently receiving. Procedures are not stacked all at once during the same period — they must be safely designed with appropriate intervals and sequencing. Please let us know during your consultation about any current procedures and medications, and we will work it out together.
Q6. What is the difference between GOURI and Rejuran?
They differ in core ingredients and mechanism. GOURI uses liquid PCL to stimulate fibroblasts and support collagen production, while Rejuran uses a PN (polynucleotide) class ingredient to support skin regeneration and recovery. Because they work differently, a combination may also be considered depending on the situation. For a detailed comparison, please refer to the Rejuran vs. Juvelook Comparison Guide.
Q7. What side effects and precautions should I be aware of?
Due to the nature of injection procedures, temporary swelling, redness, and bruising can occur at the treatment site. Rarely, mild tenderness or a nodule sensation may occur; very rarely, infection or allergic reactions have been reported. If you are pregnant or breastfeeding, have an active infection, are taking anticoagulants or immunosuppressants, have an autoimmune condition, or have ingredient allergies, please be sure to let us know during your pre-treatment consultation. Whether and to what extent side effects occur varies between individuals.
Q8. Can I come in just for a consultation?
Absolutely. GOURI is a procedure where the design varies based on the area, goals, and sequence with other treatments, so we actually encourage you to fully understand everything through a consultation before deciding. Whether or not you proceed with treatment, please feel free to contact us at 02-6203-3434 or via KakaoTalk. (Consultation and treatment fees vary depending on individual condition and design, and will be explained during the consultation.)
Closing
GOURI is not a procedure to pursue simply because it is well known — it is a collagen booster assessed through a pre-treatment consultation and skin evaluation for those exploring liquid PCL for collagen stimulation. What matters is not the product's name recognition, but whether its mechanism genuinely suits your skin and goals.
At Cellinique (Gangnam, Dosan-daero), Dr. Kim Gun-woo personally handles everything from the initial consultation through each procedure and follow-up visit. If you are interested in GOURI, we encourage you to start with a consultation where you can talk through your skin condition and care goals at your own pace. For comparisons with other skin boosters, see the Rejuran vs. Juvelook Comparison Guide; for procedure details, the GOURI Treatment Information Page; and for shared safety standards, the Cellinique Procedure Safety Information.
✅ Fact-check Report
The key medical information in this article has been verified against the following sources.
- Manufacturer DEXLEVO official information (gouri.co.kr) — GOURI ingredient (liquid PCL), manufacturer, Korea's MFDS medical device approval and European CE mark, approved indication ("temporary improvement of periocular fine lines in adults")
- Dimonitsas et al., J Cosmet Dermatol 2025 (PMC11845914 · PMID 39703099) — Liquid PCL's mechanism phases (inflammation, proliferation, remodeling) and fibroblast stimulation for collagen production; particle-free liquid formulation characteristics
- PMID 40074205 (2025) — Reported mechanism of PCL stimulating fibroblast collagen synthesis
- Approval scope — Korea's MFDS medical device approval + European CE. U.S. FDA approval or clearance is neither confirmed nor claimed in this article; information is limited to the scope of Korea's MFDS approval and European CE.
- The precise MFDS registration number and product classification of GOURI (DEXLEVO) can be confirmed through official MFDS channels or during consultation. PCL concentration (%) and detailed formulation information are referenced from the manufacturer's IFU or MFDS approval text. Dr. Kim Gun-woo's qualifications, including "certified trainer" status, can be confirmed through Cellinique's official clinic information.
- Verified items: ingredient (liquid PCL), manufacturer (DEXLEVO), mechanism (fibroblast stimulation / collagen production), MFDS approval/indication, CE mark, side effects, individual variation disclosed. Definitive statements regarding efficacy figures, duration of effect, precise PCL concentration, MFDS registration number, and overseas (FDA) approval status are not used in this article.
Medical Disclaimer
This content is intended for general health information purposes only. Individual diagnosis, suitability for procedures, and expected outcomes must always be determined through a prior consultation with a qualified medical professional. All medical procedures carry individual variation and the possibility of side effects.
Cellinique — Consultations & Appointments
Yeonseung Building 2F, B1, 228 Dosan-daero, Gangnam-gu, Seoul
Phone: 02-6203-3434
Hours: Monday–Friday 10:00–19:00 / Last Saturday of each month 10:00–16:30
