Polylactic acid (PLA) jẹ iru tuntun ti ipilẹ-ara ati ohun elo biodegradable isọdọtun, eyiti a ṣe lati sitashi ti a dabaa nipasẹ awọn orisun ọgbin isọdọtun (bii agbado ati gbaguda). Awọn ohun elo aise sitashi gba glukosi nipasẹ saccharification, ati lẹhinna bakteria ti glukosi ati awọn igara lati ṣe agbejade lactic acid mimọ giga, ati lẹhinna nipasẹ ọna iṣelọpọ kemikali lati ṣapọpọ polylactic acid ti iwuwo molikula kan. O ni o dara biodegradability.