Home›Glossary›Poly-D,L-lactic acid (PDLLA): Meaning in Aesthetic Medicine
Poly-D,L-lactic acid (PDLLA): what the term means
Medically reviewed by Dr Sin Yong · Last reviewed · 4 min read
Published 10 October 2026 · Reviewed by Dr Sin Yong
Poly-D,L-lactic acid, or PDLLA, is a biodegradable polymer made from both the D and L forms of lactic acid. In aesthetic medicine it is used as microspheres in collagen-stimulating injectables, most widely known in Juvelook, where it is combined with hyaluronic acid. It differs from the poly-L-lactic acid (PLLA) in Sculptra in particle shape and structure.
Key facts
Made of
D- and L-lactic acid polymer
Particles
Spherical and partly porous, about 30 µm, against sheet-like PLLA particles of about 50 µm (Su, Polymers 2025)
Hyaluronidase dissolves the hyaluronic acid carrier, not the PDLLA
Where poly-D,L-lactic acid matters on this site
PDLLA is discussed on this site mainly through Juvelook, and the pages below are where it is chosen, compared, or dealt with when it has been placed elsewhere.
Juvelook: the product page, where Dr Sin Yong treats it as a skin-quality tool first and explains why sagging is a lifting problem, not a reason for more product.
Collagen biostimulators: five products and two different jobs, with PDLLA beside PLLA, CaHA and PCL.
Which skin booster: when a hyaluronic acid or polynucleotide booster suits the goal better than a collagen stimulator.
Time Freeze Laser LCLR®: its Sculpting mode, which Dr Sin Yong uses for excess or clustered Juvelook placed elsewhere, including under the eye.
Regulatory status. The manufacturer, VAIM, classifies Juvelook as a disposable medical device intended for the temporary improvement of facial wrinkles in adults. In Singapore, medical devices are regulated by the Health Sciences Authority; see how aesthetic medicine is regulated in Singapore.
Not to be confused with
PDLLA products are often marketed against their neighbours, which makes the distinctions worth stating plainly.
Poly-L-lactic acid (Sculptra). The L-form polymer, supplied as irregular sheet-like particles and reconstituted before injection. Laboratory work shows the particles differ; no head-to-head clinical trial has shown one to be better.
Hyaluronic acid skin boosters. Juvelook contains hyaluronic acid, but only as a carrier. A pure hyaluronic acid booster can be dissolved; the PDLLA microspheres cannot.
Polynucleotides. Injected for skin repair, with no particle and no collagen scaffold. They are a different mechanism aimed at a different problem.
The collagen injection vs collagen biostimulator page explains why "collagen" on a label can mean placed collagen or grown collagen. Before agreeing to any of these, it is reasonable to ask which material is in the syringe, what part of it can be dissolved, and how a nodule would be managed if one formed.
What decides whether PDLLA matters for you
Dr Sin Yong starts by asking which problem is in front of him, because PDLLA answers some and not others.
Skin quality, volume or laxity? It is directed at the first two. Descent of the jowl or cheek needs a lift, such as the VF Lift – Vertical Facelift or focused ultrasound.
What has been injected before. Collagen stimulators and hyaluronic acid layered over several years are a common reason faces look heavy, so earlier work is mapped with ultrasound first.
The area. Under the eye, where the skin is thin, nodules have been reported; that area is approached with particular caution, and the when not to have tear trough filler guide covers the wider reasons for restraint there.
Acceptance that it cannot be fully reversed. Hyaluronidase dissolves the carrier, not the microspheres.
Placement, dilution and spacing are set after examination, and this site does not publish session counts.
Dr Sin Yong prefers energy-based treatment for almost every concern that injectables are used for: FSX Laser for the skin, and the VF Lift for lifting and hollow areas. It adds no product, so there is no injected material to cause pillow face, migration or lumps. Where an injectable is the right choice, he says so and explains why.
Both are polylactic acids that prompt the skin to lay down collagen over months as the particles break down. A 2024 review set out how their chemistry and particle shape differ, and a 2025 laboratory comparison measured the rounder, partly porous PDLLA spheres against PLLA's irregular sheets (Lee, Polymers 2024; Su, Polymers 2025). Neither study compared clinical results head to head.
Under the eye, PDLLA has been reported for the tear trough, and a 2025 case report described non-inflammatory nodules there that were managed with energy-based treatment rather than hyaluronidase (Wan, J Cosmet Dermatol 2025; Seo, J Cosmet Dermatol 2025). Full guide: Juvelook in Singapore; lumps after non-HA fillers: lumps after Sculptra, Radiesse, Ellansé or Juvelook.
“PDLLA builds slowly and cannot be dissolved, so the amount placed is a decision you live with.”
Dr Sin Yongon poly-d,l-lactic acid (pdlla) | dr sin yong
Frequently Asked Questions
Neither label fits exactly. Juvelook combines poly-D,L-lactic acid microspheres with non-cross-linked hyaluronic acid, so it behaves as a collagen stimulator with a hyaluronic acid carrier. Dr Sin Yong uses it first as a skin-quality tool, and for modest volume where the assessment supports it. It does not lift, so sagging is planned with a different treatment rather than more product.
It has been reported for the tear trough, and so have non-inflammatory nodules there that hyaluronidase cannot dissolve. Dr Sin Yong can use Juvelook, a PDLLA product, under the eyes, but he prefers energy-based treatment there: FSX Laser for the skin, and the Restore arm of the VF Lift for hollow areas. If PDLLA is used there, the skin is thin and the material is not reversible, so it is decided only after examination and ultrasound of any earlier filler. Where excess or clustered PDLLA is already present under the eye, Dr Sin Yong uses the Sculpting mode of Time Freeze Laser LCLR®.
No. Sculptra is poly-L-lactic acid (PLLA). PDLLA uses both D and L forms and has rounder, partly porous particles.
Not with hyaluronidase. Hyaluronidase breaks down the hyaluronic acid in products like Juvelook, but the PDLLA particles are degraded by the body over time.
References
Su CY, et al. Physicochemical comparison of poly-D,L-lactic acid and poly-L-lactic acid injectable fillers. Polymers. 2025;18(1):84. doi:10.3390/polym18010084. source
Lee KWA, et al. Poly-d,l-lactic acid (PDLLA) application in dermatology: a literature review. Polymers. 2024;16(18):2583. doi:10.3390/polym16182583. source
Wan J, et al. Poly-D,L-lactic acid injection for the tear trough in Korean women. J Cosmet Dermatol. 2025;24(3):e70058. doi:10.1111/jocd.70058. source
Seo SB, Wan J, Yi KH. Non-inflammatory nodules after poly-D,L-lactic acid in the tear trough treated with monopolar radiofrequency: a case report. J Cosmet Dermatol. 2025;24(1):e16575. doi:10.1111/jocd.16575. source
VAIM Co., Ltd. Juvelook and Juvelook Volume (Lenisna) product information: composition and intended use. source
Foreign Body Granulomas Reaction Related to Collagen Stimulatory Cosmetic Fillers: A Systematic Review. Journal of Cosmetic Dermatology (PubMed). pubmed.ncbi.nlm.nih.gov
Identification and complications of cosmetic fillers: sonography first. Journal of Ultrasound in Medicine (PubMed), 2015. pubmed.ncbi.nlm.nih.gov
