聚左乳酸（PLLA）是童颜针核心胶原再生原料，采用精密微球工艺打造，粒径高度均一、分散性优异、批次稳定性出众，从源头保障注射效果平滑可控、起效均匀、长效稳定。本品为医用级可降解生物材料，生物相容性优异，可在体内安全代谢为二氧化碳与水，无残留风险。凭借精准粒径分布与出色稳定性，能持续激活自体胶原新生，实现自然渐进式紧致、丰盈与抗衰，效果自然持久。产品严格遵循医用级质控标准，纯度高、无杂质、溶解性佳、不易团聚结块，适配高端医美填充、胶原再生制剂开发，是打造合规、安全、长效童颜针产品的理想核心原料。

English（278 words）

Poly-L-Lactic Acid (PLLA, CAS: 33135-50-1) is the core collagen-regenerating raw material for Sculptra. Produced with precision microsphere technology, it features excellent particle uniformity, outstanding dispersibility, and exceptional batch-to-batch stability, ensuring smooth, consistent, controllable, and long-lasting injection effects. As a medical-grade biodegradable biomaterial with superior biocompatibility, it safely metabolizes into carbon dioxide and water without residues. With precise particle size distribution and reliable stability, it continuously stimulates autologous collagen regeneration for natural, gradual skin tightening, volume restoration, and anti-aging results. Manufactured under strict medical-grade quality control, our PLLA offers high purity, low impurities, excellent solubility, and resistance to agglomeration. It is ideal for high-end aesthetic fillers and collagen-regenerating formulations, serving as a premium core ingredient for safe, compliant, and long-lasting Sculptra products.