Skin Guide · Sep 2026
Skin Guide
Three injections, three jobs
They are offered as alternatives to each other. They are not doing the same work.
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Skin Guide · Juvelook
Juvelook vs Rejuran vs HA skin boosters: which does what
People arrive having been told these are three versions of the same thing, and that the choice is mostly about budget. It is not. The three materials behave differently once they are in the skin, and that difference decides which one suits what you actually want changed.
Maylin Apgujeong · Skin Guide
The useful question is not which one is strongest. It is what the material does after it is in there, because that single answer sets the timeline, the kind of change you get, and the risks that come with it.
Three different answers:
An HA skin booster holds water
Stabilised hyaluronic acid, placed superficially. Hyaluronic acid binds water, so the material itself is the effect. Skin looks plumper and more reflective while the product is present, and returns to its baseline as the body resorbs it over the following months.
It is the only one of the three where what you see soon after the appointment is roughly what the treatment does. That makes it the predictable option, and also the one that needs repeating.
Juvelook scaffolds, then leaves
Poly-D,L-lactic acid microspheres with a small amount of hyaluronic acid. The hyaluronic acid smooths briefly and goes. The microspheres act as a scaffold, prompt your skin to build collagen on and between them, then break down and clear.
So the result is not the product. The result is tissue you made, and the material that caused it is gone by the time you are looking at it. Our Juvelook page sets out the usual course: three sessions, about a month apart.
Rejuran works on repair
Polynucleotides, derived from salmon DNA. Rather than occupying space like a filler or scaffolding like a collagen stimulator, this class is used to support the skin’s own repair processes. The target is skin quality and resilience rather than contour.
It is usually given as a course spaced a few weeks apart, and the change is gradual. If you are hoping to see a difference in the mirror on the way home, none of these three except the HA booster will oblige, and even that one is partly swelling on the day.
Strongest is the wrong question. What the material does after it is in there is the right one.
On choosing between the threeThe timelines are not comparable
This is where most of the disappointment comes from, because people judge all three on the same schedule.
An HA booster shows earliest and fades earliest. Rejuran builds over its course. Juvelook is the slowest of the three to show anything. The collagen response usually becomes visible somewhere from week four to week eight, and it keeps improving after the final session, which none of the others do. Week two after a first Juvelook session looks like nothing happened, and that is the expected shape of it rather than a failure. We cover that in the timeline article.
What none of them do
None of the three lifts a face, and none of them replaces lost volume. Those are separate problems with separate answers, and a skin-quality treatment will not solve them however many sessions you have. If sagging is the complaint, all three are the wrong conversation and we will say so at consultation.
The risks are not the same either
Delayed nodules, a firm lump appearing weeks or months after the injection, are the characteristic risk of the poly-lactic-acid class. That is a real difference between Juvelook and the other two, not a technicality, and it is worth understanding before you consent rather than after. What they are, and how they are treated.
It is also why the same three materials are not interchangeable under the eyes. Nodular reactions in the tear trough are specifically documented, and the skin there is thin enough that small irregularities show, so we approach that area conservatively, or not at all.
Choosing, and combining
Crepey, thin-looking skin where the goal is firmness over months points one way. Wanting to look rested for something in three weeks points another. Having had filler already and wanting skin quality treated separately points somewhere else again.
They are also not mutually exclusive, and people are often on more than one over a year. What that should look like depends on your skin and your dates, which is an examination question rather than an article question.
What the evidence covers, and what it does not
Our own doctors have published a review of skin boosters covering hyaluronic acid, poly-L-lactic acid, poly-D,L-lactic acid, polydeoxyribonucleotide and polynucleotides: all three of the materials on this page. Yi K, Park M, Ree Y, Kim HM. Korean Association for Laser Dermatology and Trichology 2023;4:1–5. It is published in a Korean society journal that is not indexed on PubMed, so there is no link to give; the full list is on our Journal Articles page.
For poly-D,L-lactic acid specifically, a randomised evaluator-blinded trial in 260 patients compared it against hyaluronic acid for nasolabial folds over 52 weeks, with 67.6 per cent of the PDLLA group improved by at least one grade at 24 weeks against 60.9 per cent for hyaluronic acid. Ting W, et al. Aesthetic Surgery Journal 2024;44(12):NP898–NP905. PubMed 39178357. What it does not show: the product studied is AestheFill rather than Juvelook, it was a single injection rather than a course, and hyaluronic acid filler in a fold is not the same thing as an HA skin booster.
And the honest limit on the whole page: there is no trial that puts these three materials side by side in the protocols they are actually used in. Anyone giving you a clean ranking of the three is giving you an opinion. This article is an explanation of what each material does, which is a different and more defensible claim.
Read next
If you have decided Juvelook is the one you want to understand properly, start with why it is not a filler, then what the first eight weeks look like.
General information, not medical advice for your individual case. What is appropriate depends on your history and on an examination. See also our Medical Disclaimer and Medical Review Process.
Published
Medically reviewed by Hyoung Moon Kim, MD, PhD on .
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That is what the consultation is for. We will look at your skin and tell you what we would recommend and what we would leave alone, including if the answer is nothing for now.
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