Guide · Collagen stimulators
Juvelook vs Sculptra PDLLA and PLLA collagen stimulators, compared honestly
Juvelook and Sculptra are both injectables that prompt your skin to make its own collagen, slowly. Here is how the two polymers differ, what the one head-to-head trial found, the real risks, and what is available in our network.
Quick answer
- Sculptra, made by Galderma, is poly-L-lactic acid (PLLA). Juvelook, made by VAIM in Korea, is poly-D,L-lactic acid (PDLLA) combined with non-cross-linked hyaluronic acid. Both are collagen biostimulators: they work gradually by triggering a controlled healing response, not by filling a space directly.
- Sculptra is mostly placed deeper, for volume and support in areas such as the temples and cheeks. Juvelook is often used more superficially for skin quality, pores and fine crepiness, as well as for folds.
- Both are usually given as a series of sessions about four weeks apart, with change building over weeks to months. A 2026 randomised split-face trial on nasolabial folds found the PDLLA product non-inferior to PLLA, with comparable improvement to 24 weeks.
- Nodules are the side effect to ask about; dilution, depth and technique all affect the risk. At IN Eternity Clinic, Dr Sin Yong offers PLLA and PCL collagen biostimulators and PDLLA skin boosters, priced at consultation; ask the clinic which brands it currently uses.
The basics
Two collagen stimulators, two polymers
Polylactic acid is a biodegradable polymer used in medicine for decades, including in dissolving stitches. Injected as tiny particles, it prompts immune cells and fibroblasts to gather around them and lay down new collagen. As the particles slowly break down, that collagen remains. In a human biopsy study after PLLA, collagen type I increased significantly at three and six months.
The difference between the two products starts with the molecule. PLLA uses only the L form of lactic acid and is semicrystalline. PDLLA mixes the D and L forms and is largely amorphous, which changes how the particles behave once mixed and injected. Juvelook also contains non-cross-linked hyaluronic acid; Sculptra does not.
Side by side
PDLLA (Juvelook) vs PLLA (Sculptra) at a glance
| PDLLA, e.g. Juvelook | PLLA, e.g. Sculptra | |
|---|---|---|
| Maker of the named brand | VAIM, Korea | Galderma |
| Polymer | Poly-D,L-lactic acid, largely amorphous | Poly-L-lactic acid, semicrystalline |
| Hyaluronic acid in the product | Yes, non-cross-linked | No |
| Common uses | Skin quality, pores, texture, under-eye crepiness; also folds | Volume and support in temples and cheeks, early sagging, décolletage |
| Usual course | A series, often about four weeks apart | A series, often two to four sessions about four weeks apart |
| When change shows | Gradually over weeks to months; the HA may give brief early hydration | Early swelling fades within days; collagen builds over weeks to months |
| Main side effects | Bruising, swelling, small bumps; nodules possible | Bruising, swelling; nodules possible, linked to dilution and technique |
| Head-to-head evidence | Non-inferior to PLLA for nasolabial folds in one split-face trial | Comparator in the same trial |
| In our network | PDLLA skin boosters at IN Eternity Clinic; ask which product | PLLA and PCL biostimulators at IN Eternity Clinic; ask which product |
Dilution
Dilution and mixing matter more than the logo
Both products arrive as a powder that must be mixed before use. With PLLA, the vial is mixed with sterile water and given time to hydrate; the amount of water depends on the area, and in a 2026 décolletage study vials were mixed with 8 mL or 17 mL of sterile water plus local anaesthetic. A review of PLLA side effects linked papules and nodules to incorrect mixing, an uneven suspension, injecting too superficially and skipping post-treatment massage.
PDLLA is also mixed before treatment, and the doctor sets the dilution according to the goal: more dilute and shallower for skin quality, less dilute and deeper for folds. PDLLA products are sometimes marketed as less prone to lumps. That has not been shown in head-to-head human safety data, and a 2026 laboratory and mouse study found PDLLA particles clumped more than PLLA particles after mixing. In short, how the product is prepared and placed matters at least as much as which one is chosen.
Timeline
Sessions, onset and how long it lasts
Neither is a one-visit treatment. Studies of both have used a series of injections about four weeks apart: three sessions in the split-face trial, and up to four in the décolletage study. The number you need depends on your skin, the area and the goal, and is set at consultation.
With PLLA, the water causes some fullness on the day that settles within a few days; the real change comes as collagen builds over the following weeks to months. With PDLLA, the hyaluronic acid can make skin look briefly more hydrated, then the collagen effect follows. How long results last varies with age, metabolism and lifestyle, and maintenance is planned individually rather than promised. Because biostimulators cannot be dissolved the way HA filler can, careful planning comes first.
Evidence
What the research shows
The only randomised head-to-head trial we found compared a PDLLA-plus-HA product with PLLA on the nasolabial folds. In 33 people, each side received one product, three injections four weeks apart. Both sides improved significantly at every time point to 24 weeks, the improvement was comparable, and the PDLLA product was judged non-inferior. The authors called for longer-term safety studies.
For biostimulators as a group, a 2025 meta-analysis of 25 studies found high satisfaction, frequent minor side effects such as pain and bruising, and nodules in about 5% of treated people. Evidence specific to PDLLA is newer and mostly comes from small studies, so it should be read with that in mind.
Risks
Nodules and other risks
- Common: pain at injection, bruising, swelling and redness for several days.
- Small lumps or nodules: more likely with superficial placement, concentrated mixing or uneven distribution; some settle, some need treatment.
- Rare but serious: as with any injectable, product entering a blood vessel. Sudden severe pain, skin colour change or vision problems need urgent medical attention.
- Not suitable: pregnancy or breastfeeding, active skin infection in the area, known allergy to any component; discuss autoimmune disease, keloid scarring and blood thinners first.
- Generally avoided: the lips, and very superficial placement of PLLA around the eyes.
Choosing
Which might suit you
- Hollow temples, flattened cheeks or a gaunt look after weight loss: a deeper biostimulator such as PLLA or PCL is usually the conversation to have.
- Dull, crepey skin, enlarged pores or fine texture, with no real volume loss: a PDLLA skin booster or another skin booster may fit better.
- A clear structural hollow you want corrected now: hyaluronic acid filler acts on the day; a biostimulator does not.
- Sagging rather than volume loss: lifting with HIFU, radiofrequency or threads may be more relevant, sometimes combined with a biostimulator.
- Not ready for needles: start with a non-invasive skin-quality treatment, and see a doctor if you later want injectables.
In our network
Sculptra and Juvelook in Singapore: what we offer
Injectables in Singapore are a medical procedure, done by a doctor. At IN Eternity Clinic, 9 Scotts Road, #12-01 Pacific Plaza, beside Orchard MRT, Dr Sin Yong offers collagen biostimulators (PLLA and PCL) and injectable skin boosters (HA, PN and PDLLA). The clinic does not commit to a particular brand on its pages, so if you want Sculptra or Juvelook specifically, ask which products it currently uses. Treatment is priced at consultation; WhatsApp +65 8815 3008.
SkinRev Lab, at CityLink Mall, does not inject. For needle-free skin-quality care there, Needleless SkinBooster is S$288 per region (first region from S$98), and SKINTIGHT microplasma for crepey skin and texture is S$588 per zone, before GST. Neither replaces a biostimulator for lost volume.
Sources
References & sources
- Park JY, Im DJ, Jeon HD, Kim HJ, Rhee DY, Goo BL, et al. A split face study comparing the effect of a PDLLA based product and PLLA on the nasolabial fold (NLF). Skin Res Technol. 2026;32(1):e70324. PMID 41532837.
- Goldberg D, Guana A, Volk A, Daro-Kaftan E. Single-arm study for the characterization of human tissue response to injectable poly-L-lactic acid. Dermatol Surg. 2013;39(6):915-922. PMID 23464798.
- Narins RS. Minimizing adverse events associated with poly-L-lactic acid injection. Dermatol Surg. 2008;34(Suppl 1):S100-S104. PMID 18547172.
- Smith L, Rahmati M, Pizzol D, et al. Biostimulants in aesthetic medicine: a systematic review and meta-analysis of efficacy, safety, and patient satisfaction. Aesthet Surg J. 2025;45(12):1278-1284. PMID 40674466.
- Joseph J, Palm MD, Bråsäter D, Wolgast C, Weinberg F, Prygova I. Safety and effectiveness of two reconstitution volumes of poly-L-lactic acid for correction of décolletage wrinkles. J Drugs Dermatol. 2026;25(6):553-557. PMID 42235050.
- Jang J, Jin C, Ding Z, et al. PLLA and PDLLA fillers: linking crystallinity and mechanical stability to aggregation, redispersion, and collagen formation. In Vivo. 2026;40(3):1437-1451. PMID 42049428.
Common questions
Your questions,
answered
What is the difference between Juvelook and Sculptra?
Sculptra is poly-L-lactic acid (PLLA), while Juvelook is poly-D,L-lactic acid (PDLLA) with non-cross-linked hyaluronic acid. Both stimulate collagen gradually. Sculptra is usually placed deeper for volume and support; Juvelook is often used more superficially for skin quality as well as folds.
Is Juvelook better than Sculptra?
Not on current evidence. One randomised split-face trial on nasolabial folds found the PDLLA product non-inferior to PLLA, with comparable improvement to 24 weeks. Which suits you depends on the area and goal.
How many sessions of Juvelook or Sculptra do I need?
Both are usually given as a series, often two to four sessions about four weeks apart. The exact number depends on your skin, the area and the goal, and is set at consultation.
When will I see results from Sculptra or Juvelook?
Gradually. Early swelling from the mixing water fades within days, and the collagen effect builds over the following weeks to months. Juvelook's hyaluronic acid can give brief early hydration.
Do Sculptra and Juvelook cause lumps?
Nodules can happen with any biostimulator; a 2025 meta-analysis found them in about 5% of treated people. Correct dilution, depth and technique reduce the risk, and some lumps need treatment.
Is Sculptra available in Singapore?
Sculptra and Juvelook are offered by some medical clinics in Singapore, always by a doctor. IN Eternity Clinic offers PLLA and PCL biostimulators and PDLLA boosters; ask the clinic which brands it currently uses.
Can SkinRev Lab do Juvelook or Sculptra?
No. SkinRev Lab is a non-invasive aesthetic centre and does not inject. It offers needle-free options such as Needleless SkinBooster (S$288 per region) and SKINTIGHT (S$588 per zone), before GST.
How much do Sculptra and Juvelook cost?
At IN Eternity Clinic, biostimulators and boosters are priced at consultation, because the cost depends on the product, the amount and the number of sessions. Ask for the whole plan and its fees before starting.