There are countless “collagen skin boosters” at aesthetic clinics, with so many names and ingredients that it can be hard to know what’s what.

 

I personally find it challenging to keep track as well, since new products appear every time I give a talk at conferences.

 

That said, even though there are many types, the basic mechanism of collagen skin boosters is the same.

 

The Principle of Collagen Boosters

The biological basis for Sculptra®-induced augmentation (2014)

As the name suggests, these agents induce “new collagen remodeling” to replace age-degenerated dermal collagen.

 

By injecting biodegradable materials into the dermis to trigger a mild inflammatory response and promote new tissue formation, they aim to improve firmness and overall tone.

Poly-D,L-lactic acid stimulates angiogenesis and collagen synthesis in aged animal skin, Seyeon Oh (2023)

Since collagen exists within the dermis, the injection depth (layer) is extremely important.

 

If an expensive agent is injected too deeply into the fat layer, its effectiveness drops significantly.

 

Whether using a syringe or a cannula, the practitioner must be able to feel the resistance of the dermal layer to ensure accurate placement.

 

When examined under an electron microscope, Sculptra, Juvelook, and Ultracol all show a porous, bead-like structure.

It is known that the smaller and more uniform the particles, the lower the risk of nodules, so it is best to use clinically validated, research-backed products.

Skin rejuvenation effect of the combined PDLLA and non-cross-linked hyaluronic acid … (2023)

If the product is injected in the correct layer and in the appropriate amount, collagen remodeling will occur, leading to the formation of newly stained blue tissue under histological observation—resulting in improvements in firmness, fine wrinkles, and scars.

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Main Types and Characteristics

 

Sculptra (PLLA) & Juvelook (PDLA)
The two most representative collagen boosters are Sculptra and Juvelook.

• PLLA: Poly-L-lactic acid

• PDLA: Poly-D-lactic acid

 

Both are high-molecular polylactic polymers with the same chemical formula, but they differ in structure as mirror-image isomers.

Because of this structural difference, their biodegradation rates in the body vary, which results in different treatment durations and longevity of effect.

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Collaume (PLLA)

 

The original formulation is Sculptra (PLLA).

To address side effects such as nodule formation, Juvelook (PDLA) was developed in Korea, and later, Collaume, another PLLA-based product, was released as a subsequent generation in the same category.

Facial Enhancement and the European Experience with Sculptra™ …, Danny Vleggaar MD

The main treatment areas are the nasolabial folds and cheeks, where patients can observe overall improvement in skin firmness and volume.

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Radiesse / Bollasome (CaHA: Calcium Hydroxylapatite)

 

If Sculptra is the representative of the PLLA-based collagen stimulators, then Radiesse is the representative of the calcium-based boosters.

 

The key difference between the two lies in the core substance that induces inflammation in the dermis—PLLA in Sculptra versus CaHA (calcium hydroxylapatite) in Radiesse—though their mechanism and ultimate goal (collagen induction) are essentially the same.

 

Bollasome is positioned as a generic version of Radiesse, offering a more affordable price point.

CaHA, unlike synthetic polymers, is a biocompatible inorganic material that has the advantage of hydrating more quickly than PLLA.

Use of calcium hydroxylapatite (Radiesse®) for facial augmentation, Patricio F. Jacovella (2008)

The indications and effects are similar — the goal is to enhance skin firmness and volume.

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Ultracol (PDO)

 

Lastly, we have Ultracol, whose main ingredient is PDO (Polydioxanone) — the same material used in thread lifting sutures.

 

Think of it as thread-lifting fibers ground down into nanosized spherical particles.

PDO is also a synthetic polymer that gradually degrades in the body while inducing a mild inflammatory response within the dermis to stimulate collagen production.

 

This same principle is what inspired PDO-based thread lifts such as mono threads, cog threads, and spiral threads.

An Assessment of the Effectiveness and Safety of ULTRACOL100 … (2024)

The purpose is the same — to improve skin elasticity.

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Are there any side effects of collagen boosters?

 

Unlike skin boosters (such as Rejuran), collagen boosters have the advantage — and the drawback — of producing very long-lasting effects.

 

Histological images have shown that PLLA particles from Sculptra can still remain even 28 months after injection.

 

While this longevity is appealing, there have also been reports of nodules and granuloma formation as potential side effects.

Facial Enhancement and the European Experience with Sculptra™ …

Histological images after PLLA injection show palpable nodules, inflammatory reactions, and granuloma formation.

In other words, while inducing inflammation for tissue regeneration is effective, if the inflammation becomes chronic, it can lead to scarring as a side effect.

 

For this reason, in recent years, many clinics have started using Juvelook (PDLA) — the mirror-image isomer of Sculptra (PLLA) — as an alternative.

 

However, if the injection technique or layer is incorrect, even Juvelook can cause side effects, so proper administration is essential.

 

Although extremely rare, there have been reported cases of suspected blindness after high-volume Juvelook injections.

Fortunately, the patient’s vision recovered one month after treatment, but this case highlights that, just like with fillers, intravascular injection can be extremely dangerous.

 

Particular caution is needed when injecting around the eyes and nose, as these areas contain vessels connected to the ophthalmic artery system.

To ensure both effective results and patient safety, injections must always be administered in the correct anatomical layer.

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Summary

 

Even though collagen boosters differ in type, their basic mechanism remains the same —
controlled dermal inflammation → new collagen formation.

 

Maintaining the proper layer, dosage, and particle characteristics is the key to achieving stable results and minimizing complications.

 

Understanding the differences in material composition and degradation speed — whether PLLA, PDLA, CaHA, or PDO — allows for safer and more effective treatment planning based on the target area and purpose.

 

In high-risk areas such as around the eyes, a deep understanding of vascular anatomy and precise injection planning are essential for safety.

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Primi Clinic
3F, 52 Seongsuil-ro, Seongdong-gu, Seoul (Primi Clinic)

 

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