In an aesthetic practice, **biostimulators** are injectable treatments that stimulate the skin’s natural collagen and elastin production to improve firmness, texture, and volume over time. Unlike traditional dermal fillers that provide immediate volume, biostimulators work gradually by activating fibroblasts, leading to more natural-looking, long-lasting rejuvenation. Commonly used biostimulators include poly-L-lactic acid and calcium hydroxylapatite, and they are often chosen to address skin laxity, thinning, and overall quality rather than creating instant contour changes.