Collagen biostimulators: overview

Collagen biostimulators are injectable products that prompt the body to produce new collagen in the treated area. Unlike hyaluronic acid, which takes up space and shows results right after the injection, the collagen biostimulator works gradually: the effect appears over weeks and months, as the tissue itself responds.

This guide is an overview, at a review level, to help fit biostimulators into facial planning. It does not name brands, and it gives no dilutions, volumes or technique. Indication, preparation and injection follow each product's package insert and the decision of the qualified professional, according to the rules of their professional council in Brazil.

How does a biostimulator work?

Once injected, the product triggers a controlled tissue response. This response involves the activation of cells that produce collagen, which is gradually deposited around the particles or the injected material. Over time, part of the product is absorbed and the collagen formed remains, giving more firmness and some volume.

That is why the result depends on the patient. Age, skin quality, smoking, sun exposure and general health influence the response.

What are the main types?

The biostimulators most used in orofacial harmonization (HOF) belong to a few chemical families. Each has its own behavior.

Each manufacturer describes indications, areas, preparation and contraindications. They change from product to product, even within the same family.

What is the difference from hyaluronic acid?

The comparison helps explain to the patient why the plan may include both.

In practice, many plans combine the two: hyaluronic acid for volume and contour at specific points, the biostimulator for the overall quality of the tissue.

What are the most common indications?

• Mild to moderate laxity, mainly in the midface and lower face.
• Loss of skin firmness, with a "tired" tissue look.
• Diffuse volume loss, where the goal is to improve the overall structure instead of filling a single point.
• Complement to hyaluronic acid plans, to improve tissue quality where filler was placed.

Areas often mentioned include the cheekbone, the temples and the jawline, per each product's package insert. Areas of very thin skin, such as under the eyes, and areas with a lot of movement, such as the lips, are usually avoided or require a very specific indication, because of the risk of visible nodules.

What are the contraindications and precautions?

Besides the general contraindications in HOF, some points weigh more with biostimulators:

• Autoimmune diseases, especially when active, because of the possibility of an exaggerated inflammatory response.
• Tendency to keloids or abnormal healing.
• History of nodules or granulomas with fillers.
• Expectation of an immediate result, which does not fit the mechanism of the product.
• A patient with an upcoming event who wants the result ready in a few days.

Which complications are described?

Most complications are mild: swelling, bruising and local pain. The ones that worry most with biostimulators are:

• Early nodules, often linked to inadequate preparation, distribution or indication.
• Late nodules and inflammatory reactions, which may appear months later, including granulomas.
• Visible irregularities, mainly in thin skin.
• Vascular occlusion, a risk with any injectable, with the added problem that a biostimulator is not reversed by hyaluronidase.

This last point weighs on the choice of product in areas of high vascular risk, such as the nasolabial fold and the temples. The overview of complications is in the safety overview.

How to plan treatment with a biostimulator

Diagnosis

Before thinking about the product, define the problem: is it loss of volume, of firmness, of skin quality, or a combination? Facial assessment by thirds helps separate what is structure from what is coverage.

Sessions and intervals

Biostimulators are usually planned in sessions, with an interval between them to assess the response. The number of sessions and the interval are the professional's decisions, depending on the product and the patient.

Expectations

The patient needs to understand that:

• the result does not appear on the day;
• improvement is gradual and varies from person to person;
• the effect is on tissue quality, not on isolated volume;
• maintenance may be needed.

Documentation

Photograph before each session, always with the same protocol. Since the change is slow, without standardized clinical photography it is hard to show the patient what changed, and they may think it did not work.

How to combine a biostimulator and hyaluronic acid

When the plan includes both, the order and the interval between them are the professional's decisions, depending on the products and the patient. Some considerations usually enter that decision:

• The goal of each product in the plan. Isolated volume and support on one side, overall tissue quality on the other.
• Assessing the result. Injecting both at the same time in the same area can make it hard to know what came from each one.
• Swelling. Adding procedures increases the initial swelling and can confuse the assessment in the first weeks.
• Quote and stages. Spreading the products over stages helps the patient plan and allows the plan to be adjusted according to the response.

How to explain the biostimulator to the patient

The biostimulator is the HOF procedure that is hardest to "sell" honestly, because the patient leaves the office seeing no difference. Some ways of explaining it tend to work:

• Compare it to a process, not a product. "This treatment stimulates your skin to produce collagen. The improvement comes little by little, over the next weeks and months."
• Separate volume from quality. "Filler puts volume in one spot. The biostimulator improves the firmness of the tissue as a whole."
• Agree on how to assess. "We will take photos today and at every follow-up, always the same way, so you can see the progress."
• Be clear about sessions and maintenance. The number of sessions and the need for maintenance must be in the quote from the start.

Which mistakes appear most often?

• Indicating a biostimulator for someone who needs isolated, immediate volume.
• Injecting in a thin-skin area without a clear indication in the package insert.
• Not following the preparation indicated by the manufacturer.
• Assessing the result too early and concluding that it "did not work."
• Not photographing to a standard, which prevents showing the progress.
• Not warning that the product is not reversed by hyaluronidase.

And in Harmy?

In Harmy, the Plan records volumes in ml per area and the projection shows the likely visual effect of that volume, changing only the marked areas and without retouching the skin. It does not simulate the improvement in skin quality that the biostimulator aims for. When the plan combines hyaluronic acid with a biostimulator, the projection serves to show the volume part, and the conversation about the gradual effect of the biostimulator is up to you. It is an illustrative simulation, not a promise of results. The actual result feature in the history, on the other hand, helps compare the before photo with the follow-up photo, which is useful in slow-response treatments.

Checklist before indicating a biostimulator

1. Main problem defined (volume, firmness, skin quality).
2. Medical history with attention to autoimmune diseases and a history of nodules.
3. Area compatible with the product's package insert.
4. Expectation of a gradual result explained and accepted.
5. Number of sessions and intervals agreed.
6. Patient informed that the product is not reversed by hyaluronidase.
7. Standardized before photos.
8. Product, lot, preparation, volume and area recorded.

For the comparison between injection instruments, see cannula or needle.