Restylane is a FDA-approved dermal filler made of a biodegradable, non-animal stabilized hyaluronic acid (NASHA). Hyaluronic acid is a natural substance found in all living organisms and provides volume and fullness to the skin. Restylane is indicated for mid-to-deep dermal implantation for the correction of moderate to severe facial wrinkles and folds, such as nasolabial folds. Restylane is also indicated for sub mucosal implantation for lip augmentation in patients over the age of 21.