PDO is short for polydioxanone, which is a compound that has been used to create absorbable sutures used in surgeries for decades. In fact, PDO first found its use in the medical field as a way to close incisions related to cardiovascular surgeries. Repurposed for cosmetic facelifts, PDO is a body-friendly type of suture that can sit naturally beneath skin and is eventually absorbed into the body.

Although PDO is reabsorbed by the body, the natural regenerative properties of the body – specifically collagen production – are stimulated by the compound, which further extends the results of this treatment.