Restylane is the first and only dermal filler made of crystal-clear gel called NASHA (Non-Animal Stabilized Hyaluronic Acid).

NASHA is developed using a unique stabilization process that results in its long duration of effect in contrast to non-stabilized hyaluronic acid, which lasts only days to weeks, at most.

As opposed to other hyaluronic acid products, NASHA is not derived from animal sources. It is produced biotechnologically by natural fermentation in a sterile laboratory environment. This significantly diminishes the risk of transmitting diseases between species or of eliciting allergic reactions in patients who are sensitive to common foods, such as beef, chicken and eggs.

NASHA has been extensively researched for over a decade and proven to be safe and effective. Restylane does not require any allergy or skin test prior to injection.