1. The core ingredients and principles of Sculptra's "童顏針" (youthful face needle). The main ingredient of Sculptra is poly-L-lactic acid (PLLA), a synthetic substance that can be slowly absorbed by the human body, featuring good biocompatibility and safety. When Sculptra is injected into the dermis layer of the skin, poly-L-lactic acid gradually activates the body's own repair mechanisms. It acts like a "wake-up call", stimulating the activity of fibroblasts, promoting the mass production of collagen. Collagen serves as a key substance for maintaining skin firmness and elasticity. As people age, collagen gradually diminishes. Sculptra works by replenishing collagen, building internal support structures within the skin, thus improving aging issues such as skin laxity and wrinkles. This method of achieving beauty results through activating the body’s self-repair capabilities differs from traditional fillers, offering a more natural rejuvenation effect.