When it comes to thread lifting for skin tightening, many people might think of COG threads or mint threads that require large needles and are inserted directly under the skin. But today, the latest innovation from Korea has introduced "Olidia," a liquid thread made from Poly-L-Lactic Acid (PLLA) extracted into a water-soluble form, which can be injected into the skin as an alternative to traditional thread lifting. What is liquid thread? Why is it called “liquid thread”? “Li