No. People who type is re20 a filler into Google usually mean Re2O, an ECM-type collagen booster, not a filler.
A filler occupies space to rebuild a contour on the day it is injected; Re2O is placed to support the skin’s own matrix and is judged over weeks. Different job, different result, different reason to book it.
Before anything else, a spelling problem worth thirty seconds of your time. Re2O ends in a capital letter O and is the ECM booster this article is about.
Re20, written with the digits two and zero, is not a separate product. It is the same name typed with a zero in place of the letter O, and it turns up in search bars, chat messages and even some clinic menus.
If you searched is re20 a filler, you are asking about Re2O, and everything below applies to you.
With that untangled, the rest of this guide covers what the material does, how the three overlapping categories of filler, booster and stimulator actually divide, and the situations in which a filler really is the better-suited answer.
We are Relieve Clinic, in Apgujeong, Seoul, and our working principle is that beauty is perfected in comfort. Dr. Park Tae-oh consults and treats one-to-one in a private room — no sales consultants, no handover to a different injector once you have agreed to something.
The short answer to is Re2O a filler
Category matters more than product name. Once you know which of three boxes something sits in, you can predict roughly how it will behave without knowing anything else about it.
| Category | What it does | When you judge it | Example |
| Filler | Occupies space, projects a contour | Same day | Hyaluronic acid filler |
| ECM booster | Supports the skin’s structural matrix | Weeks to months | Re2O |
| Collagen stimulator | Provokes new collagen production | Months | PDLLA or PLLA products |
| Repair booster | Calms and repairs without heat | Weeks | Polynucleotide products |
Re2O sits in row two. If your goal is a defined chin or a raised nose bridge, row two will disappoint you no matter how many sessions you buy.
The reverse holds as well: a patient whose real complaint is thin, tired-looking skin across the whole cheek will not be satisfied by a product engineered to project a single point, however skilfully it is placed.
Most disappointment in aesthetic medicine starts as a category error rather than a technical one.
What Re2O contains and what that means
Re2O comes from the Elravie line, a Korean injectables family, and is positioned around extracellular matrix support rather than volumising.
The extracellular matrix is the structural mesh sitting between your skin cells — the scaffolding that determines whether skin feels supported or slack.
We deliberately keep the ingredient discussion at that level rather than reciting a specification sheet. Where a composition detail is not something we can verify, the manufacturer’s own material is the place to read it, and we say so in consultation instead of improvising.
This is a newer category in which evidence is still accumulating, and describing it accurately is more useful to you than describing it enthusiastically.
What the matrix framing does tell you is the kind of change to expect: quality of skin rather than shape of face.
Filler, booster, stimulator: three different jobs
The confusion is understandable. All three arrive in a syringe, all three go into skin, and all three are sold under the loose heading of injectables. But the mechanisms have almost nothing in common.
- A filler is a volume object. It stays where the injector puts it and its effect is visible before you leave the chair.
- A booster is a conditioning treatment. Nothing is being built up; something is being supported or repaired, and it reads as texture and light reflection rather than contour.
- A stimulator is a request to your own body. It asks tissue to lay down new collagen, so its timeline is measured in months.
- The injection depth differs too. Fillers are typically placed deep for structure; boosters work in the dermis where skin quality lives.
Our broader explainer on skin booster vs filler in Korea walks through the same division with more examples on each side. The FDA’s page on dermal and soft tissue fillers is a useful third-party reference for what regulators mean when they say filler, which is narrower than how the word is used in clinic marketing.
Where Re2O is placed and what changes
Placement follows category. Because it is a skin-quality treatment, Re2O is distributed across a region rather than deposited at a single point.
Cheeks, the area around the mouth, the neck in some plans — anywhere the complaint is described as slack, dull or thin rather than hollow.
Depth is chosen by region too, since the skin over the jawline behaves differently from the skin of the mid-cheek and will not tolerate an identical pass.
What patients report noticing, when they notice something, is not a new shape. It is that skin sits differently: a little firmer to the touch, a little more even under light. That is the honest description of what an ECM-directed treatment is aiming at, and it is why we record a 3D skin analysis at the first visit. Comparing a measured scan across sessions is a far more reliable way to assess a subtle change than comparing your memory of a face to the face in today’s mirror.
💡 If you are also weighing whether Juvelook is a filler, that guide answers the same question for the PDLLA family, where the reasoning runs slightly differently.
Sessions and how Re2O is combined
Boosters in this category are planned as short courses with weeks between visits, not as a single appointment. The spacing exists so each round can be assessed before the next is added.
Combination is common and sensible. A structural deficit might be handled with filler while the surrounding skin is treated with a booster; a patient recovering from a laser course might have a repair-family product first and matrix support later.
The sequencing is the clinical decision, and it is made after an examination rather than from a menu. Readers who want the full map of which family does what will find it in our guide to Korean skin booster types, and the product-level detail lives in the Re2O ECM booster in Korea.
When a filler is the more suitable answer
Sometimes the right advice is to put the booster conversation down entirely, and a clinic that never says so is not doing you a favour.
If the problem you see in photographs is a shadow — a hollow temple, a flattened cheek, a chin that reads as short in profile — that is a structural deficit and it wants a structural material. No amount of matrix support will project a contour that is not there.
Equally, if what bothers you is downward drift rather than deflation, the answer may be energy-based lifting instead of anything in a syringe.
Being told which of these applies to you, before you pay for the wrong one, is most of the value of a proper consultation. International patients can send photographs and questions ahead of a trip, and we continue follow-up remotely after you fly home, so that which matters more than anything that happens in the chair.
This page is general information and not medical advice. Individual results vary with skin type, age and the concern being treated, and any treatment plan should be confirmed in a face-to-face consultation with a licensed doctor.
Chat with Relieve Clinic — Free English Consultation
Is Re2O the same as Re20?
Yes. Re20 with the digits two and zero is a common misspelling of Re2O, which ends in a capital letter O. Both names refer to the same ECM-type collagen booster.
Will Re2O add volume to my cheeks?
It is not designed to. An ECM booster supports skin quality across a region rather than projecting a contour. If your concern is a hollow, a filler or a volumising biostimulator is the more suitable conversation.
How many Re2O sessions are usual?
Treatments in this category are planned as short courses with several weeks between visits so each round can be assessed before the next. The exact number depends on your skin and is decided at consultation. Individual results vary.
Dr. Park Tae-oh is the founder and director of Relieve Clinic Seoul in Apgujeong, Gangnam, where he performs consultation and treatment personally. His work centers on reducing discomfort during aesthetic dermatology, drawing on more than 30,000 clinical cases. In June 2026 he demonstrated periorbital radiofrequency technique using XERF at Cynosure Lutronic Academy Korea.
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