GOURI versus Re2O: when to choose which
Both are candidates for thinned skin, so they get confused. The difference is exactly one thing: does it tell the skin, or give the skin?
The short answer
GOURI provokes a reaction so the body makes collagen; Re2O supplies collagen and elastin directly. Both are candidates when skin has thinned and lost density. If a foreign-body reaction and nodules worry you, or you are fine with human-derived material, Re2O; if you want your own collagen to increase rather than material added, and you accept that it cannot be reversed, GOURI. They have never been compared directly.
In one table
| GOURI (liquid PCL) | Re2O (hADM) | |
|---|---|---|
| Method | Foreign-body reaction makes collagen | Supplies collagen and elastin |
| Source | Synthetic polymer (polycaprolactone) solution | Extracellular matrix of donated human skin |
| Legal status | Korean approval text not located | Human tissue — tissue-bank licence |
| Human data | 33 people, up to 6 months, no control | 20 people, 20 weeks, HA-alone control (post-launch) |
| Nodules / foreign-body reaction | None found, but denominator of 33 | Not a foreign-body-reaction method |
| Reversible | Does not dissolve with hyaluronidase | Not dissolvable, but absorbed gradually |
| Traceability | Product lot | Donor to distribution — tight, as human tissue |
| Sessions | Manufacturer: one, optional more | No fixed protocol; 1–3 by condition |
Choose GOURI when
- You want your own collagen to increase rather than material added
- Volume is fine but firmness and density have dropped
- Human-derived material bothers you
- You understand it cannot be reversed and the data is 33 people, and choose anyway
Choose Re2O when
- Nodule risk from the PCL and PLLA class worries you
- Skin has thinned so much the material itself is lacking
- Non-reversible synthetic material is uncomfortable
- You know and accept the human-derived source
Neither when
Lost volume is filler territory and a sagging contour is RF territory. For neck and hands, the GOURI manufacturer recommends the face only and Re2O has no neck-specific data, so for both we say “no data” first.
Which treatment fits which concern
| Concern | Treatments to consider | Why |
|---|---|---|
| Lost firmness and density, want own collagen | GOURI | Makes collagen |
| Very thin skin needing material | Re2O | Supplies it |
| Nodule concern | Re2O or Rejuran | No foreign-body reaction |
| Prefer synthetic material | GOURI | Not human-derived |
| Hollow cheeks | Filler class | Neither |
| Sagging contour | Density / XERF | Neither |
Which treatment is “best” is decided by the state of your skin right now, not by the product. In consultation we look first at what has been lost and what is still there, before we talk about any product name.
Frequently asked questions
Which lasts longer?
GOURI was followed to six months, Re2O to 20 weeks. Neither has data beyond, so they cannot be compared.
Can I have both?
Split by area or timing, yes. Not the same area on the same day.
Is human skin as a source safe?
Only the structural material remains after cells and DNA are removed; it has long been used in burn and breast reconstruction. If it bothers you, we will not push it.
Read next
If you want to go deeper
Product page
Who wrote this
Written and reviewed by Lee Chi-Hak, MD, medical director of Miso Clinic in Daegu, South Korea. Studies are cited with their size and limitations, and where we could not find data we say so. Individual decisions need an in-person examination; this page does not replace one.
| Medical director | Lee Chi-Hak, MD |
|---|---|
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References
- GOURI manufacturer official FAQ — sessions (one recommended; optionally 1–2 follow-ups at 4–6 weeks) and treatment area (face only; hand and neck data still being collected).
- Ponzo M et al., PRS Global Open 2025;13(11), PMID 41210393 — 30-person pilot, six-month follow-up, no control group.
- Re2O manufacturer material (L&C Bio) — extracellular matrix from acellular human dermis (hADM), distributed as human tissue.
- Severance Hospital group, Int J Mol Sci 2026;27(5):2193, NCT07155278 — 20 people, 20 weeks, control was hyaluronic acid alone. Conducted after launch (November 2024).
Everything on this page is general information and does not replace medical diagnosis or treatment. Effects and side effects vary with individual skin condition, age and underlying illness, and the same result is not guaranteed for everyone. Any decision to proceed should be made in an in-person consultation with a physician.
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