Sculptra (poly-L-lactic acid) works by stimulating your body’s own collagen production gradually over time. While it is well documented to improve skin thickness, volume loss, and overall texture, the improvement in tensile strength is more of an indirect effect. By enhancing collagen formation and supporting the extracellular matrix, the skin often becomes firmer and more resilient. Elastin regeneration, however, is not as robust as collagen stimulation—Sculptra’s main mechanism is collagen neogenesis rather than elastin production. So while you may notice improved firmness and support in the skin, true elastin regeneration remains limited compared to collagen. In summary, Sculptra helps restore structural integrity and firmness, which can feel like improved tensile strength, but the primary benefit comes from collagen induction rather than direct elastin synthesis.