Rejuran vs Juvelook
These two are asked about together more than any other pair in Korean clinics. Both are injected across the skin rather than placed in one spot, and there the similarity ends.
The short answer
Rejuran (polynucleotide) is a repair treatment. It suits thin, reactive, tired-looking skin, and the under-eye area.
Juvelook (PDLLA) is a firmness treatment. It suits skin that has lost resilience and someone willing to wait two to three months to see it.
Quick comparison
| Rejuran (polynucleotide) | Juvelook (PDLLA) | |
|---|---|---|
| What it is | Purified DNA fragments, usually salmon-derived | Poly-D,L-lactic acid in a hyaluronic acid carrier |
| Main effect | Repair, calming, skin quality | Collagen building, firmness |
| First visible change | From the second or third session | Month 2–3 |
| Sessions | 3–4, two to four weeks apart | 2–3, four to six weeks apart |
| Duration | Months; maintained with repeat sessions | Around 12–18 months |
| Reversible | Not applicable — absorbed | No |
| Under-eye use | Common | Cautious |
| Immediate look | Small bumps for up to a day | Slight plumpness that fades, then returns as collagen |
Choose Rejuran if
- Your skin is thin, easily irritated or looks tired regardless of skincare
- The under-eye area is the main concern
- You have had a course of hydration boosters and want something that does more than hydrate
- You want the safer option to start with, because it is the gentler of the two
Choose Juvelook if
- Your complaint is firmness rather than fragility
- You can wait two to three months and prefer fewer sessions
- You want the result to last a year or more
- You have already tried repair-type boosters and want a different mechanism
The mistake to avoid
Judging either one at two weeks. Both look underwhelming early — Rejuran because one session is a third of a course, Juvelook because the carrier fades before the collagen arrives. People who conclude nothing happened at week two often add more product than they needed.
If you can only do one course
Ask the consultation to name the problem first. If the answer is “your skin barrier and quality”, that is Rejuran territory. If it is “your skin has lost support”, that is Juvelook territory. If the answer is “you have lost volume”, neither is right and you are looking at fillers instead — the distinction is set out in skin booster vs filler.
FAQ
Can I do both?
Clinics do combine them across a year, usually as separate courses rather than mixed in one session. Doing both at once makes it impossible to tell which one your skin responded to.
Which is better for under the eyes?
Polynucleotide boosters are the more common choice there, because the aim is skin quality in very thin skin. Biostimulators in that area are handled more cautiously.
Which lasts longer?
The collagen effect from a PDLLA course generally outlasts a polynucleotide course. That is a consequence of the mechanism rather than of quality.
Are these the only two?
No — the category is crowded and brands change. The type matters more than the brand, and the two types on this page cover most of what is offered.