Injectable treatments that stimulate the body’s natural collagen production, providing gradual skin thickening, improved texture, and long-lasting rejuvenation from within.
Biostimulators are injectable substances that work differently from traditional dermal fillers. Rather than adding volume directly, they trigger the body’s own fibroblasts to produce new collagen. This results in gradual, natural-looking improvement in skin quality, thickness, and firmness over weeks to months.
Common biostimulator substances include poly-L-lactic acid (PLLA, e.g., Sculptra) and calcium hydroxylapatite (CaHA, e.g., Radiesse). At St. George Hospital, biostimulator selection is based on the patient’s skin quality, treatment goals, and anatomical considerations.
After injection, biostimulator particles are surrounded by the body’s immune cells, which trigger a controlled foreign body response. This process stimulates fibroblasts to lay down new type I and type III collagen around the particles. As the biostimulator is gradually absorbed over months, the newly formed collagen framework remains.
The result is a progressive improvement in skin thickness, elasticity, and firmness that develops over 2-6 months and can last 18-24 months or longer. This mechanism produces results that are more subtle and natural-looking than volumizing fillers, making biostimulators particularly suited for overall skin quality improvement.
Our physicians will evaluate whether this treatment is appropriate for your condition after a thorough assessment.
Treatment involves a series of injection sessions (typically 2-3) spaced 4-6 weeks apart. The physician injects the biostimulator in a grid or fan pattern across the treatment area after applying topical anesthetic. Sessions take 30-45 minutes. Mild swelling and bruising may occur and resolve within a few days. Results develop gradually over the following weeks and months as collagen production increases.
Biostimulators have robust clinical evidence supporting their safety and efficacy. Poly-L-lactic acid (Sculptra) and calcium hydroxylapatite (Radiesse) are both approved by regulatory authorities in Europe and the United States. Long-term studies published in the Journal of Cosmetic Dermatology, Dermatologic Surgery, and Aesthetic Surgery Journal demonstrate sustained improvement in skin quality and patient satisfaction. Side effects are generally mild; proper injection technique is essential to avoid nodule formation.
