TEOSYAL® ULTIMATE is a non-pyrogenic, transparent, visco-elastic gel made of reticulated hyaluronic acid that does not have an animal origin. TEOSYAL® ULTIMATE works by adding volume to skin tissue that fills subcutaneous depressions and restores facial contours, then this biodegradable gel gradually absorbs. You can use TEOSYAL® ULTIMATE to add volume to the cheeks, chin, or other areas of facial tissue that have experienced volume loss. Inject TEOSYAL® ULTIMATE with a 23G1" hypodermic needle, included with the product, or for a different injection technique you can use a round cannula with side holes. Depending on the facial area treated, you should inject TEOSYAL® ULTIMATE into the fatty subcutaneous tissue or the pre-periosteal area.