What Are Collagen-Stimulating Fillers and How Do They Work?

If we were to point our finger at the single biggest culprit behind aging skin, it would be the loss of collagen. This protein is found everywhere in your body, and it’s responsible for much of the support and structure of your tissues and organs, including the biggest organ of them all — your skin.

It makes sense, then, that one of the best ways to address aging skin is to encourage your body to rebuild its natural collagen support network. That is precisely the mission of collagen-stimulating and regenerative treatments.

As experts in cosmetic injectables, the Skin Shop MedSpa team, under the direction of key opinion leaders Dr. Tiffany Su and Dr. Hui “He” Kang, has found great success meeting, and exceeding, expectations with collagen-stimulating fillers. Here’s how.

The role of collagen in your skin

Let’s step back and briefly review why getting collagen back online is so important in reversing the aging process.

As we mentioned, collagen is a protein — the most plentiful protein in the human body — and it oversees your skin in myriad ways, including:

• Providing structure and support to soft tissues
• Encouraging fibroblast activity in your skin for new cell growth
• Giving your skin elasticity and tone
• Replacing dead skin cells

The collagen levels in your skin are highest in your early 20s, and their production begins to decline from there, by about 1% per year. While the natural loss of collagen production can affect your skin, existing collagen fibers in your skin can break down with time, usually due to exposure.

So, between the natural loss of collagen production and the breakdown of this protein, your once youthful skin gradually succumbs to aging.

Providing the right tools with collagen-stimulating fillers

Given all that collagen does to support healthy, vibrant skin, it makes sense to find ways to overcome the deficit as you age, which is where collagen-stimulating fillers come in.

At our practice, we have researched today’s leading collagen-supporting and regenerative options and selected four standout treatments:Radiesse®, Sculptra®, and Rejuran®, and Ariessence® Pure PDGF+. Here’s how they work:

Radiesse

The active ingredient in Radiesse is calcium hydroxylapatite (CaHA), which comes in tiny microspheres suspended in a gel. These spheres create a framework beneath your skin where new collagen can gather to lift and tighten loose, aging skin from below.

This biostimulation also leads to other positive changes that can breathe new life into aging skin, such as:

• Encouraging more elastin for tone
• Improving moisture retention to help your skin glow
• Angiogenesis — encouraging healthier blood flow to deliver nutrients and oxygen

And the best part about Radiesse? It offers immediate results thanks to the gel, as well as  longer-lasting results than traditional hyaluronic acid fillers — up to two years!

Sculptra

Sculptra collagen stimulators work much in the same way as Radiesse, but using a different ingredient. At the heart of Sculptra is Poly-L-lactic acid, which works beneath your skin to restore the structure with renewed collagen production.

This biostimulator creates a scaffold in the deeper layers of the tissue, to which type I collagen proteins can attach themselves, creating a new foundation for more youthful skin.

Like Radiesse, Sculptra also promotes glowing skin through improving moisture retention.

Sculptra also delivers impressive results that can last up to two years, which is great news given that satisfaction rates for these injectables exceed 90%.

Rejuran

This collagen-stimulating treatment is a bit different than the others. With Rejuran, we inject polynucleotides derived from purified salmon DNA into your skin to encourage healing and regeneration. 

Rejuran takes a healing approach to aging skin as the injected DNA fragments signal your skin cells to repair themselves, stimulating fibroblasts to naturally produce more collagen and elastin, which can hit the reset button on aging skin.

Ariessence Pure PDGF+

Ariessence Pure PDGF+ is a regenerative, topical treatment that complements procedures designed to renew the skin.

The formula combines recombinant platelet-derived growth factor-BB, or PDGF-BB, with hyaluronic acid. Unlike treatments derived from a patient’s own blood, Ariessence does not require a blood draw and provides a sterile, consistent formulation.

Ariessence is applied topically following procedures such as:

• Microneedling
• Radiofrequency microneedling
• Laser skin resurfacing
• Chemical peels

When used as a post-procedure enhancement, Ariessence supports the appearance of healthier, rejuvenated skin while helping improve visible tone, texture, hydration, and radiance. It may also help make the post-treatment recovery experience more comfortable and reduce the appearance of downtime.

Because Ariessence is a topical cosmetic rather than an injectable filler, it does not replace lost facial volume in the way Radiesse or Sculptra can. Instead, it complements collagen-stimulating procedures by supporting skin renewal and optimizing the appearance of treatment results.

Your road to collagen

Given what we’ve just discussed, it’s little wonder that collagen-stimulating fillers are becoming increasingly popular — nearly one million treatments were performed in 2024 in the United States.

If you want to join these satisfied numbers, we invite you to contact our Houston, Texas, office at 713-701-1717 today. You can also use the convenient booking feature on our website to schedule an appointment.