Cymetra™ is a human collagen product. The collagen is micronized (ground into tiny particles, and treated to remove any possibility of contamination with bacteria or viruses). It is then made into a dry powder. Before use, it is reconstituted to create a paste consistency that can be injected through a relatively fine needle. Commonest use is to fatten and firm up a paralyzed vocal cord . Duration of benefit varies between six weeks and six months. Consequently, this procedure is used when only temporary assistance is needed – as when it is believed that the vocal cord’s function will recover.