Why I Still Don’t Use Collagen Stimulators as Fillers

Introduction: The Collagen Stimulator Debate

Collagen stimulators such as poly-L-lactic acid (PLLA), polycaprolactone (PCL), and calcium hydroxyapatite (CaHA) are designed to encourage the skin to produce more collagen.

At VIDASKIN, we use them thoughtfully — for example, CaHA can be applied in the subcutaneous plane to stimulate the reticular dermis (reticular cutis), where it helps strengthen the skin foundation.

However, we do not use collagen stimulators as “fillers” in the deep fat compartments. Collagen in these spaces does not behave like natural fat — it behaves more like scar tissue. And because collagen stimulators rely on inflammation to work, misusing them in fat compartments risks accelerating, rather than slowing, ageing.

What Are Collagen Stimulators

Collagen stimulators are injectable products that trigger a controlled healing response, leading to new collagen production over weeks to months.

Examples:

• Poly-L-lactic acid (PLLA)
• Polycaprolactone (PCL)
• Calcium hydroxyapatite (CaHA)

Why Collagen Stimulators Shouldn’t Be Used in Deep Fat Compartments

Key Considerations:

• Unpredictable Outcomes: Collagen formation varies widely between individuals.
• Not Reversible: Unlike HA fillers, collagen stimulators cannot be dissolved.
• Nodules and Lumps: In deep fat pads, collagen stimulators may lead to irregular or fibrotic deposits.
• Collagen ≠ Fat: Collagen in fat compartments is not youthful fat — it is fibrous, scar-like tissue.

The Role of Inflammation in Ageing

Collagen stimulators act by creating controlled inflammation. While this can encourage collagen in the right layer, excessive or misplaced inflammation can lead to “inflamm-ageing” — premature ageing caused by chronic low-grade inflammation.

Why this matters:

• Inflammation in the dermis may strengthen tissue.
• Inflammation in fat compartments may cause fibrosis and loss of natural softness.

How VIDASKIN Uses Collagen Stimulators Safely

At VIDASKIN, our philosophy is to place each product in its correct anatomical layer:

• CaHA (Radiesse) – used in the subcutaneous plane to stimulate the reticular dermis, strengthening the skin’s foundation.
• Not in Deep Fat Compartments – we avoid this because the outcome would be fibrotic rather than natural.
• HA Fillers – preferred for restoring volume in deep fat pads, as they are soft, predictable, and reversible.
• Profhilo Structura & Skin Boosters – for hydration, soft tissue support, and superficial quality improvements.

Where Collagen Stimulators May Play a Role

When used carefully, collagen stimulators may be suitable for:

• Improving skin thickness and firmness in the dermis.
• Supporting structural layers such as the reticular cutis.
• Selected areas such as temples, jawline, or neck when placed correctly.

They are not a replacement for fat compartments and should not be thought of as “fillers.”

FAQs: Collagen Stimulators vs. Fillers

Q1. Do you use collagen stimulators at VIDASKIN?
Yes — selectively. For example, CaHA is used in the subcutaneous plane to stimulate the reticular dermis.

Q2. Why not use them in deep fat compartments?
Because collagen there would act like scar tissue, not soft youthful fat. This risks hardness or irregularity.

Q3. How does inflammation affect ageing?
Chronic or misplaced inflammation can contribute to premature ageing (“inflamm-ageing”). Controlled use in the right layer can be beneficial, but not in fat pads.

Q4. What’s the safer choice for restoring fat compartments?
Hyaluronic acid fillers remain the mainstay for restoring fat volume because they integrate predictably and can be reversed if required.

Q5. What does VIDASKIN recommend?
Our doctors recommend treatment based on anatomy and goals, combining fillers, bioremodelling HA, skin boosters, and device-based lifting when appropriate.