What is Re2O (Elravie Re2O), and who is it for?
Elravie Re2O is an injectable skin booster developed in Korea by L&C Bio. It is made from donated human skin that has been processed to remove its cells, leaving the dermal matrix, which is then broken into fine particles for injection; this is called human acellular dermal matrix (hADM). It is aimed at skin quality, such as fine lines, texture, dryness and thin skin, rather than at lifting. It may suit people whose main concern is the skin itself; it does not suit people whose main problem is sagging tissue.
In Korea it is supplied under the regulations for human tissue products. It is not approved by the US FDA, and published long-term data are still limited.
What is in it
The dermis, the thick inner layer of the skin, is held together by a framework between the cells called the extracellular matrix. It is made mainly of collagen, elastin and other structural molecules, including hyaluronic acid. This framework gives skin its firmness, spring and thickness, and it thins with age and sun exposure.
Re2O supplies pieces of that framework directly. In his column on the product, Dr. Kim describes it as a different kind of skin booster: rather than adding a single ingredient, it delivers finely processed hADM, the same structural material that makes up the skin's own support (column on Elravie Re2O, 2026). The aim is to support the skin's own repair and improve its texture and thickness. How much it does this, and for how long, is still being studied.
Where it comes from, and why that matters
Acellular dermal matrix is not new in medicine. Sheets of processed donor dermis have been used for years in reconstructive surgery, for example to support tissue in breast reconstruction. Re2O applies the same kind of material in a particulated, injectable form for the skin.
- Donor screening: tissue comes from screened donors.
- Removal of cells: the cells are removed in processing, which is intended to reduce the risk of immune reactions and of transmitting disease.
- Regulation: in Korea it falls under the rules for human tissue products, not the rules for synthetic fillers.
Some people prefer not to receive any product made from human tissue, for personal, religious or other reasons. That is a reasonable choice. Tell the clinic, and other skin treatments can be discussed.
How it differs from other skin boosters
| Type | What is injected | Main idea |
|---|---|---|
| Hyaluronic acid boosters | Hyaluronic acid | Holds water in the skin for hydration |
| Polynucleotide boosters | DNA fragments, often from salmon | Thought to support the skin's repair environment |
| Collagen stimulators | Synthetic particles such as PLLA | Trigger the body to build collagen around them |
| Re2O | Human acellular dermal matrix | Supplies matrix components directly |
These are different approaches, not a ranking. Head-to-head comparisons are limited. A fuller comparison is in Re2O, Rejuran and other skin boosters: how do they differ?
How a course of Re2O usually goes
According to Dr. Kim's column, a session takes roughly ten minutes, and numbing cream is usually enough. He writes that one session can already help, and that around three sessions spaced three to four weeks apart give a fuller effect.
| Stage | What to expect |
|---|---|
| Before | The skin is assessed first. Cleansing and numbing cream. |
| Injection | Small amounts are placed in the skin across the area, with fine needles or a cannula. |
| Same day | Small raised bumps and redness, which usually settle within the day. No makeup on the day. |
| First week | Avoid alcohol, saunas and smoking for about a week. Bruising, if any, fades. |
| Following weeks | Changes in texture develop gradually and vary between people. |
The number of sessions and the spacing are decided by how the skin responds, not by a fixed package.
Who it may suit
In his column, Dr. Kim lists the people Re2O tends to suit:
- fine lines together with a general loss of elasticity
- enlarged pores or an uneven balance of oil and moisture
- dry, rough skin texture
- hollowing under the eyes, along the smile lines or at the side of the cheeks, in people who would rather avoid surgery or filler
- people who want to look after their skin before aging changes become marked
He also stresses that, as with any injectable, the result depends on who injects it and how, and that Re2O is chosen only when it is the most suitable booster for that skin.
Who it does not suit
- Sagging: heavy jowls, loose neck skin or a dropped brow are deeper-layer problems. A booster does not lift. Ulthera or surgery such as a mini facelift is more relevant.
- Marked volume loss: hollow temples or flat cheeks need volume support such as Sculptra.
- A preference against human tissue products.
- Pregnancy or breastfeeding, and active infection or inflammation in the area.
- People who expect a dramatic change after one session.
Tell the clinic about allergies, immune or autoimmune conditions, blood-thinning medicines and recent treatments in the area.
Risks and side effects
- Bumps, redness and swelling at injection points, common and usually short-lived
- Bruising, more likely with blood thinners
- Lumps or uneven texture, usually temporary
- Infection, rare with any injection; increasing pain, warmth and redness need prompt review
- Allergic or immune reactions, possible with any injected material
- An uncertain long-term profile, because the product is relatively new
What results to expect, realistically
Re2O is a skin-quality treatment, so the changes it aims at are subtle: skin that looks smoother, less crepey and more even, and that may feel more supple. It does not change the shape of the face, and it does not tighten a jawline. Changes develop over weeks, because the skin has to respond, and they vary a great deal between people. Some people notice a clear difference in texture; others notice little.
Results also depend on what else is happening in the face. If the skin is thin but the deeper support has loosened too, improving the skin alone may leave the overall look much the same. This is why the layers are assessed before a booster is chosen. How to tell the layers apart is explained in Fine lines or sagging: how do you tell which layer needs treatment?
Questions to ask before Re2O
- Which of my concerns is a skin problem, and which comes from a deeper layer?
- Why Re2O for my skin rather than another type of booster?
- How many sessions, how far apart, and how will we judge whether it is working?
- Will it be combined with a device, and if so, in what order?
- What should I avoid before and after, and what signs should make me call the clinic?
Re2O with energy devices
Dr. Kim notes in his column that Re2O can be used alone, but that it is often paired with focused ultrasound such as Ulthera or with radiofrequency such as Thermage. The device works on lifting and firmness, while Re2O works on the quality and structure of the dermis. Whether the two are done on the same day is covered in Can Thermage and Re2O be done on the same day?
Why it matters who plans it
A booster placed on skin that is really sagging, or on a face that has lost volume, will disappoint. Dr. Kim starts from the layer that has changed: he writes that lifting should begin by looking at every layer to find the cause (clinic blog, 2025). Trained in plastic surgery at Chonnam National University, where he served as a clinical professor, he has written about Re2O in his own column and lectured to clinicians in 2026 on stepwise combination treatment for skin quality. Why Dr. Kim for Thermage and Re2O
Common questions
Is Re2O FDA-approved?
No. In Korea it is supplied under the regulations for human tissue products. It is not approved by the US FDA, and published long-term data are limited.
How many Re2O sessions are needed?
Dr. Kim writes that one session can already help and that around three sessions spaced three to four weeks apart give a fuller effect. The actual number depends on how your skin responds.
Does Re2O lift the face?
No. It aims at skin quality, such as texture, fine lines and thickness. Sagging of the deeper layers needs a lifting treatment such as Ulthera, or surgery when it is marked.
Is there downtime after Re2O?
Usually little. Small bumps and redness at the injection points typically settle within the day. Makeup is avoided on the day, and alcohol, saunas and smoking for about a week.
Is a product made from human skin safe?
Donors are screened and the cells are removed in processing, which is intended to reduce the risk of immune reactions and transmitted disease. No injection is free of risk, and long-term data on Re2O are limited. If you prefer not to receive a human tissue product, other skin treatments can be discussed.
Related pages: Re2O · Dr. Kim on Re2O · Thermage + Re2O · Fine lines or sagging: which layer? · Sculptra