Re2O vs Rejuran: Which 'Regeneration' Does My Skin Need?

First Published 2026-03-24 / Last Reviewed 2026-03-24

Many people are contemplating between Rejuran, a steady seller in the skin booster market, and Re2O, which has recently gained attention. The most common question during consultations is, "Which one is more effective?" However, what's more important is accurately understanding "what state my skin is currently in and what it lacks." Here, we summarize the practical differences and selection criteria for these two treatments, based on daily observations of patients in the clinic.

During consultations, many patients are confused because both treatments are said to help 'skin regeneration'. However, their mechanisms of action are completely different. Rejuran uses ingredients extracted from salmon DNA to send 'regeneration signals' to the skin, while Re2O 'directly replenishes' the human-derived ECM (extracellular matrix) structure. To use a simple analogy, Rejuran is like giving nutrients to a dry potted plant to help it grow well, whereas Re2O is like directly filling a pot with good quality soil when the soil itself is insufficient.

The core ingredient of Rejuran, PN (Polynucleotide), is a DNA fragment extracted from salmon germ cells. It has high biocompatibility, being approximately 97% similar to human DNA, and when injected into the dermis, it activates fibroblasts to induce collagen production.

• Regeneration Signal Transmission: It has been reported to bind with adenosine receptors, promoting cell proliferation and angiogenesis.
• DNA Repair: The supplied nucleic acid fragments are utilized as raw materials to aid cellular DNA synthesis, supporting the skin's self-recovery ability.
• Diverse Lineup: It has the advantage of customized treatments for specific areas, such as 'Healer' for the entire face, 'HB+' for enhanced hydration, 'i' for the eye area, and 'S' for scars.

Re2O (Elravie Re2O) is an ECM skin booster based on hADM (human acellular dermal matrix). While existing skin boosters stimulate the skin to produce something, Re2O is characterized by directly injecting structures identical to human skin components into the dermis.

• ECM Structure Replenishment: The 3D structure itself, including collagen (Type I·III), elastin, and GAG, immediately increases dermal density.
• Human Tissue Derived: Classified as a human tissue graft material with cells and immunogenic substances removed, it theoretically has excellent biocompatibility.
• Long-term Remodeling: The injected particles are gradually absorbed over several months and undergo a process of being replaced by autologous tissue.

Here are three questions patients most frequently ask during consultations.

Q. Is Re2O much more expensive because it's made of human skin components? A. Re2O has a higher price point than typical hydration boosters due to its sophisticated human tissue processing. However, compared to Rejuran, its maintenance period is relatively longer, and it offers a structural advantage of directly increasing dermal density, leading to high satisfaction relative to its cost.

Q. Is the bruising/swelling less noticeable than with Rejuran? A. Generally, yes. Rejuran, with its dense injection of high-viscosity ingredients, can cause bruising/swelling that lasts for about 3-7 days. However, Re2O's particles are finer and integrate quickly with skin tissue, usually absorbing naturally within 1-2 days. This is why those who desire a quick return to daily life prefer Re2O.

Q. When do the effects appear and what do they feel like? A. With Rejuran, you can expect a 'Watery Glow' as your skin becomes clearer 1-2 weeks after the treatment. In contrast, Re2O is characterized by a 'Density Glow' where the dermal layer feels firmer immediately after the treatment, and over time, you will experience increased skin elasticity.

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Rejuran is a good option for those whose skin's 'basic strength' has declined.

• Those whose skin frequently breaks out due to an imbalanced oil-water balance.
• Those who are starting to notice fine wrinkles and whose skin regeneration speed has slowed.
• Those with sensitive skin who find strong laser treatments burdensome.
• Those with specific concerns requiring eye-area-specific treatments or scar restoration.

Re2O can be effective when the skin's 'structural elasticity' has deteriorated.

• Those whose dermis has thinned, making their skin feel weak and flimsy like paper.
• Those whose pores have sagged vertically, making their skin texture rough.
• Those who want to simultaneously enhance volume and elasticity in areas like under-eye hollows or dark circles.
• Those who prefer a relatively longer maintenance period with a single treatment.

The content of this blog is for informational purposes only, and treatment results may vary depending on individual skin conditions. For accurate diagnosis and treatment decisions, please visit the clinic and consult with a medical professional.

Author: Dr. Kim Min-seung

• Family Medicine Specialist
• Chief International Academic Director, Korean Society for Laser Dermatology and Hair
• Academic Committee Chairman, Korean Society of Aesthetic & Functional Medicine
• ICLAS Scientific Committee Chairman
• Main Clinical Areas: Lifting, Petit, Pigmentation, Skin Regeneration

Last Reviewed: 2026-03-24 💬 Inquire about the right skin booster for my skin now